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Józef T. Haponiuk
Department of Polymer Technology, Faculty of Chemistry, Gdańsk University of Technology, Gabriela Narutowicza 11/12, 80-233 Gdańsk, Poland

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Journal article
Published: 28 July 2021 in Materials
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Reactive blending is a promising approach for the sustainable development of bio-based polymer blends and composites, which currently is gaining more and more attention. In this paper, biodegradable blends based on poly(ε-caprolactone) (PCL) and poly(lactic acid) (PLA) were prepared via reactive blending performed in an internal mixer. The PCL and PLA content varied in a ratio of 70/30 and 55/45. Reactive modification of PCL/PLA via liquid organic peroxides (OP) including 0.5 wt.% of tert-butyl cumyl peroxide (BU), 2,5-dimethyl-2,5-di-(tert-butylperoxy)-hexane (HX), and tert-butyl peroxybenzoate (PB) is reported. The materials were characterized by rotational rheometer, atomic force microscopy (AFM), thermogravimetry (TGA), differential scanning calorimetry (DSC), tensile tests and biodegradability tests. It was found that the application of peroxides improves the miscibility between PCL and PLA resulted in enhanced mechanical properties and more uniform morphology. Moreover, it was observed that the biodegradation rate of PCL/PLA blends reactively compatibilized was lower comparing to unmodified samples and strongly dependent on the blend ratio and peroxide structure. The presented results confirmed that reactive blending supported by organic peroxide is a promising approach for tailoring novel biodegradable polymeric systems with controllable biodegradation rates.

ACS Style

Marta Przybysz-Romatowska; Mateusz Barczewski; Szymon Mania; Agnieszka Tercjak; Józef Haponiuk; Krzysztof Formela. Morphology, Thermo-Mechanical Properties and Biodegradibility of PCL/PLA Blends Reactively Compatibilized by Different Organic Peroxides. Materials 2021, 14, 4205 .

AMA Style

Marta Przybysz-Romatowska, Mateusz Barczewski, Szymon Mania, Agnieszka Tercjak, Józef Haponiuk, Krzysztof Formela. Morphology, Thermo-Mechanical Properties and Biodegradibility of PCL/PLA Blends Reactively Compatibilized by Different Organic Peroxides. Materials. 2021; 14 (15):4205.

Chicago/Turabian Style

Marta Przybysz-Romatowska; Mateusz Barczewski; Szymon Mania; Agnieszka Tercjak; Józef Haponiuk; Krzysztof Formela. 2021. "Morphology, Thermo-Mechanical Properties and Biodegradibility of PCL/PLA Blends Reactively Compatibilized by Different Organic Peroxides." Materials 14, no. 15: 4205.

Journal article
Published: 06 July 2021 in Journal of Basic Microbiology
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Trypsin is a protein-digesting enzyme that is essential for the growth and regeneration of bone, muscle, cartilage, skin, and blood. The trypsin inhibitors have various role in diseases such as inflammation, Alzheimer's disease, pancreatitis, rheumatoid arthritis, cancer prognosis, metastasis and so forth. From 10 endophytic fungi isolated, we were able to screen only one strain with the required activity. The fungus with activity was obtained as an endophyte from Dendrophthoe falcata and was later identified as Nigrospora sphaerica. The activity was checked by enzyme assays using trypsin. The fungus was fermented and the metabolites were extracted and further purified by bioassay-guided chromatographic methods and the compound isolated was identified using gas chromatography–mass spectrometry. The compound was identified as quercetin. Docking studies were employed to study the interaction. The absorption, distribution, metabolism, and excretion analysis showed satisfactory results and the compound has no AMES and hepatotoxicity. This study reveals the ability of N. sphaerica to produce bioactive compound quercetin has been identified as a potential candidate for trypsin inhibition. The present communication describes the first report claiming that N. sphaerica strain AVA-1 can produce quercetin and it can be considered as a sustainable source of trypsin active-site inhibitors.

ACS Style

Anoop Kallingal; Varun Thachan Kundil; Aravind Ayyolath; Tomy Muringayil Joseph; Debarshi Kar Mahapatra; Józef T. Haponiuk; E. Jayadevi Variyar. Identification of sustainable trypsin active‐site inhibitors from Nigrospora sphaerica strain AVA‐1. Journal of Basic Microbiology 2021, 1 .

AMA Style

Anoop Kallingal, Varun Thachan Kundil, Aravind Ayyolath, Tomy Muringayil Joseph, Debarshi Kar Mahapatra, Józef T. Haponiuk, E. Jayadevi Variyar. Identification of sustainable trypsin active‐site inhibitors from Nigrospora sphaerica strain AVA‐1. Journal of Basic Microbiology. 2021; ():1.

Chicago/Turabian Style

Anoop Kallingal; Varun Thachan Kundil; Aravind Ayyolath; Tomy Muringayil Joseph; Debarshi Kar Mahapatra; Józef T. Haponiuk; E. Jayadevi Variyar. 2021. "Identification of sustainable trypsin active‐site inhibitors from Nigrospora sphaerica strain AVA‐1." Journal of Basic Microbiology , no. : 1.

Journal article
Published: 07 June 2021 in Materials
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The utilization of forestry waste resources in the production of polyurethane resins is a promising green alternative to the use of unsustainable resources. Liquefaction of wood-based biomass gives polyols with properties depending on the reagents used. In this article, the liquefaction of forestry wastes, including sawdust, in solvents such as glycerol and polyethylene glycol was investigated. The liquefaction process was carried out at temperatures of 120, 150, and 170 °C. The resulting bio-polyols were analyzed for process efficiency, hydroxyl number, water content, viscosity, and structural features using the Fourier transform infrared spectroscopy (FTIR). The optimum liquefaction temperature was 150 °C and the time of 6 h. Comprehensive analysis of polyol properties shows high biomass conversion and hydroxyl number in the range of 238–815 mg KOH/g. This may indicate that bio-polyols may be used as a potential substitute for petrochemical polyols. During polyurethane synthesis, materials with more than 80 wt% of bio-polyol were obtained. The materials were obtained by a one-step method by hot-pressing for 15 min at 100 °C and a pressure of 5 MPa with an NCO:OH ratio of 1:1 and 1.2:1. Dynamical-mechanical analysis (DMA) showed a high modulus of elasticity in the range of 62–839 MPa which depends on the reaction conditions.

ACS Style

Kamila Gosz; Agnieszka Tercjak; Adam Olszewski; Józef Haponiuk; Łukasz Piszczyk. Bio-Based Polyurethane Networks Derived from Liquefied Sawdust. Materials 2021, 14, 3138 .

AMA Style

Kamila Gosz, Agnieszka Tercjak, Adam Olszewski, Józef Haponiuk, Łukasz Piszczyk. Bio-Based Polyurethane Networks Derived from Liquefied Sawdust. Materials. 2021; 14 (11):3138.

Chicago/Turabian Style

Kamila Gosz; Agnieszka Tercjak; Adam Olszewski; Józef Haponiuk; Łukasz Piszczyk. 2021. "Bio-Based Polyurethane Networks Derived from Liquefied Sawdust." Materials 14, no. 11: 3138.

Journal article
Published: 16 December 2020 in Materials
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In this paper, novel rigid polyurethane foams modified with Baltic Sea biomass were compared with traditional petro-based polyurethane foam as reference sample. A special attention was focused on complex studies of microstructure, which was visualized and measured in 3D with high-resolution microcomputed tomography (microCT) and, as commonly applied for this purpose, scanning electron microscopy (SEM). The impact of pore volume, area, shape and orientation on appearance density and thermal insulation properties of polyurethane foams was determined. The results presented in the paper confirm that microcomputed tomography is a useful tool for relatively quick estimation of polyurethane foams’ microstructure, what is crucial especially in the case of thermal insulation materials.

ACS Style

Paulina Kosmela; Jan Suchorzewski; Krzysztof Formela; Paweł Kazimierski; Józef Tadeusz Haponiuk; Łukasz Piszczyk. Microstructure–Property Relationship of Polyurethane Foams Modified with Baltic Sea Biomass: Microcomputed Tomography vs. Scanning Electron Microscopy. Materials 2020, 13, 5734 .

AMA Style

Paulina Kosmela, Jan Suchorzewski, Krzysztof Formela, Paweł Kazimierski, Józef Tadeusz Haponiuk, Łukasz Piszczyk. Microstructure–Property Relationship of Polyurethane Foams Modified with Baltic Sea Biomass: Microcomputed Tomography vs. Scanning Electron Microscopy. Materials. 2020; 13 (24):5734.

Chicago/Turabian Style

Paulina Kosmela; Jan Suchorzewski; Krzysztof Formela; Paweł Kazimierski; Józef Tadeusz Haponiuk; Łukasz Piszczyk. 2020. "Microstructure–Property Relationship of Polyurethane Foams Modified with Baltic Sea Biomass: Microcomputed Tomography vs. Scanning Electron Microscopy." Materials 13, no. 24: 5734.

Review
Published: 06 October 2020 in Biomedicine & Pharmacotherapy
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Natural carbon based quantum dots (NCDs) are an emerging class of nanomaterials in the carbon family. NCDs have gained immense acclamation among researchers because of their abundance, eco-friendly nature, aqueous solubility, the diverse functionality and biocompatibility when compared to other conventional carbon quantum dots (CDs).The presence of different functional groups on the surface of NCDs such as thiol, carboxyl, hydroxyl, etc., provides improved quantum yield, physicochemical and optical properties which promote bioimaging, sensing, and drug delivery. This review provides comprehensive knowledge about NCDs for drug delivery applications by outlining the source and rationale behind NCDs, different routes of synthesis of NCDs and the merits of adopting each method. Detailed information regarding the mechanism behind the optical properties, toxicological profile including biosafety and biodistribution of NCDs that are favourable for drug delivery are discussed. The drug delivery applications of NCDs particularly as sensing and real-time tracing probe, antimicrobial, anticancer, neurodegenerative agents are reviewed. The clinical aspects of NCDs are also reviewed as an initiative to strengthen the case of NCDs as potent drug delivery agents.

ACS Style

Akhila Nair; Jozef T. Haponiuk; Sabu Thomas; Sreeraj Gopi. Natural carbon-based quantum dots and their applications in drug delivery: A review. Biomedicine & Pharmacotherapy 2020, 132, 110834 -110834.

AMA Style

Akhila Nair, Jozef T. Haponiuk, Sabu Thomas, Sreeraj Gopi. Natural carbon-based quantum dots and their applications in drug delivery: A review. Biomedicine & Pharmacotherapy. 2020; 132 ():110834-110834.

Chicago/Turabian Style

Akhila Nair; Jozef T. Haponiuk; Sabu Thomas; Sreeraj Gopi. 2020. "Natural carbon-based quantum dots and their applications in drug delivery: A review." Biomedicine & Pharmacotherapy 132, no. : 110834-110834.

Review
Published: 01 October 2020 in Polymer Degradation and Stability
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Nowadays, growing attention is being paid to the environment and sustainability, what fully justified research works focused on modification of biodegradable polymers and their composites. In this field of research reactive extrusion seems to be the most promising approach, which fits well to sustainable development strategy. In the present work, the in-situ modification of biodegradable aliphatic polyesters and the compatibilization of their blends by the action of free-radical initiators has been reviewed. The main concerns are the mechanisms of the free radicals induced modification of aliphatic polyesters and their blends. The cross-linked, branched or degraded structures of the formed polymers/blends were comprehensively characterized as function of modifier type and processing conditions. Moreover, the reactive processing and various types of irradiation in respect to the inter chain modification of polymers were presented. Main advantages and disadvantages related to reactive extrusion of biodegradable aliphatic polyesters and their blends in presence of free-radical-initiators were also pointed and discussed.

ACS Style

Marta Przybysz-Romatowska; Józef Haponiuk; Krzysztof Formela. Reactive extrusion of biodegradable aliphatic polyesters in the presence of free-radical-initiators: A review. Polymer Degradation and Stability 2020, 182, 109383 .

AMA Style

Marta Przybysz-Romatowska, Józef Haponiuk, Krzysztof Formela. Reactive extrusion of biodegradable aliphatic polyesters in the presence of free-radical-initiators: A review. Polymer Degradation and Stability. 2020; 182 ():109383.

Chicago/Turabian Style

Marta Przybysz-Romatowska; Józef Haponiuk; Krzysztof Formela. 2020. "Reactive extrusion of biodegradable aliphatic polyesters in the presence of free-radical-initiators: A review." Polymer Degradation and Stability 182, no. : 109383.

Original paper
Published: 22 July 2020 in Applied Magnetic Resonance
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In this work, to characterize the mobility of different sections of the macromolecules of polyurethane (PUR), polyvinyl alcohol (PVA), and polylactic acid (PLA), as well as the density of crosslinks of the polymer chains when using fillers, we used the distributions of spin–lattice and spin–spin relaxation times for the protons. It is shown that the rigidity of the thermoplastic polymers depends on the sizes of the granules of the diatomite filler, which can embed in the polymer matrix. Consequently, relaxation times are reduced. If PLA is the filler of PUR, the dynamics of the molecules in the chains and the spin–spin interaction of the protons are affected by the crosslinking of PUR by PLA. An increase in crosslinks density reduces the rate of polymer degradation.

ACS Style

J. Kucinska‑Lipka; N. Sinyavsky; I. Mershiev; J. Haponiuk. Study of the Effect of Filling Thermoplastic Medical Polyurethane with PVA, PLA or Diatomite on the Relaxation Times Distributions of 1H NMR. Applied Magnetic Resonance 2020, 51, 759 -768.

AMA Style

J. Kucinska‑Lipka, N. Sinyavsky, I. Mershiev, J. Haponiuk. Study of the Effect of Filling Thermoplastic Medical Polyurethane with PVA, PLA or Diatomite on the Relaxation Times Distributions of 1H NMR. Applied Magnetic Resonance. 2020; 51 (8):759-768.

Chicago/Turabian Style

J. Kucinska‑Lipka; N. Sinyavsky; I. Mershiev; J. Haponiuk. 2020. "Study of the Effect of Filling Thermoplastic Medical Polyurethane with PVA, PLA or Diatomite on the Relaxation Times Distributions of 1H NMR." Applied Magnetic Resonance 51, no. 8: 759-768.

Journal article
Published: 18 May 2020 in Polymers
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The cure kinetics analysis of thermoset polymer composites gives useful information about their properties. In this work, two types of layered double hydroxide (LDH) consisting of Mg2+ and Zn2+ as divalent metal ions and CO32− as an anion intercalating agent were synthesized and functionalized with hydroxyapatite (HA) to make a potential thermal resistant nanocomposite. The curing potential of the synthesized nanoplatelets in the epoxy resin was then studied, both qualitatively and quantitatively, in terms of the Cure Index as well as using isoconversional methods, working on the basis of nonisothermal differential scanning calorimetry (DSC) data. Fourier transform infrared spectroscopy (FTIR) was used along with X-ray diffraction (XRD) and thermogravimetric analysis (TGA) to characterize the obtained LDH structures. The FTIR band at 3542 cm−1 corresponded to the O–H stretching vibration of the interlayer water molecules, while the weak band observed at 1640 cm−1 was attributed to the bending vibration of the H–O of the interlayer water. The characteristic band of carbonated hydroxyapatite was observed at 1456 cm−1. In the XRD patterns, the well-defined (00l) reflections, i.e., (003), (006), and (110), supported LDH basal reflections. Nanocomposites prepared at 0.1 wt % were examined for curing potential by the Cure Index as a qualitative criterion that elucidated a Poor cure state for epoxy/LDH nanocomposites. Moreover, the curing kinetics parameters including the activation energy (Eα), reaction order, and the frequency factor were computed using the Friedman and Kissinger–Akahira–Sunose (KAS) isoconversional methods. The evolution of Eα confirmed the inhibitory role of the LDH in the crosslinking reactions. The average value of Eα for the neat epoxy was 54.37 kJ/mol based on the KAS method, whereas the average values were 59.94 and 59.05 kJ/mol for the epoxy containing Zn-Al-CO3-HA and Mg Zn-Al-CO3-HA, respectively. Overall, it was concluded that the developed LDH structures hindered the epoxy curing reactions.

ACS Style

Zohre Karami; Mohammad Reza Ganjali; Maryam Zarghami Dehaghani; Mustafa Aghazadeh; Maryam Jouyandeh; Amin Esmaeili; Sajjad Habibzadeh; Ahmad Mohaddespour; Inamuddin; Krzysztof Formela; Józef T. Haponiuk; Mohammad Reza Saeb. Kinetics of Cross-Linking Reaction of Epoxy Resin with Hydroxyapatite-Functionalized Layered Double Hydroxides. Polymers 2020, 12, 1157 .

AMA Style

Zohre Karami, Mohammad Reza Ganjali, Maryam Zarghami Dehaghani, Mustafa Aghazadeh, Maryam Jouyandeh, Amin Esmaeili, Sajjad Habibzadeh, Ahmad Mohaddespour, Inamuddin, Krzysztof Formela, Józef T. Haponiuk, Mohammad Reza Saeb. Kinetics of Cross-Linking Reaction of Epoxy Resin with Hydroxyapatite-Functionalized Layered Double Hydroxides. Polymers. 2020; 12 (5):1157.

Chicago/Turabian Style

Zohre Karami; Mohammad Reza Ganjali; Maryam Zarghami Dehaghani; Mustafa Aghazadeh; Maryam Jouyandeh; Amin Esmaeili; Sajjad Habibzadeh; Ahmad Mohaddespour; Inamuddin; Krzysztof Formela; Józef T. Haponiuk; Mohammad Reza Saeb. 2020. "Kinetics of Cross-Linking Reaction of Epoxy Resin with Hydroxyapatite-Functionalized Layered Double Hydroxides." Polymers 12, no. 5: 1157.

Journal article
Published: 14 May 2020 in Polymer Testing
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The effect of exfoliated graphite (EG) on the mechanical, tribological and dielectric properties of the silicone rubber (QM) composites has been systematically investigated and analysed. Morphological analysis of the composites helps to understand the interfacial interaction between the filler and the rubber matrix as well as wear mechanism respectively. An enhancement in the mechanical, tribological and dielectric properties was observed with an increase in filler loading and better performance was observed at 7 phr of filler loading. The improvement in performance is attributed to the better interaction between the QM chains and the EG layers as evident from the AFM and TEM analysis. It is also evident from the Kraus plot which supports the reinforcing effect of EG in QM matrix.

ACS Style

P.S. Sarath; Sohil Varghese Samson; Rakesh Reghunath; Mrituanjay Kumar Pandey; Józef T. Haponiuk; Sabu Thomas; Soney C. George. Fabrication of exfoliated graphite reinforced silicone rubber composites - Mechanical, tribological and dielectric properties. Polymer Testing 2020, 89, 106601 .

AMA Style

P.S. Sarath, Sohil Varghese Samson, Rakesh Reghunath, Mrituanjay Kumar Pandey, Józef T. Haponiuk, Sabu Thomas, Soney C. George. Fabrication of exfoliated graphite reinforced silicone rubber composites - Mechanical, tribological and dielectric properties. Polymer Testing. 2020; 89 ():106601.

Chicago/Turabian Style

P.S. Sarath; Sohil Varghese Samson; Rakesh Reghunath; Mrituanjay Kumar Pandey; Józef T. Haponiuk; Sabu Thomas; Soney C. George. 2020. "Fabrication of exfoliated graphite reinforced silicone rubber composites - Mechanical, tribological and dielectric properties." Polymer Testing 89, no. : 106601.

Journal article
Published: 10 March 2020 in Materials
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The paper describes the preparation and characterization of rigid polyurethane-polyisocyanurate (PUR-PIR) foams obtained with biopolyol synthesized in the process of liquefaction of biomass from the Baltic Sea. The obtained foams differed in the content of biopolyol in polyol mixture (0–30 wt%) and the isocyanate index (IISO = 200, 250, and 300). The prepared foams were characterized in terms of processing parameters (processing times, synthesis temperature), physical (sol fraction content, apparent density) and chemical structure (Fourier transform infrared spectroscopy), microstructure (computer microtomography), as well as mechanical (compressive strength, dynamic mechanical analysis), and thermal properties (thermogravimetric analysis, thermal conductivity coefficient). The influence of biopolyol and IISO content on the above properties was determined. The addition of up to 30 wt% of biopolyol increased the reactivity of the polyol mixture, and the obtained foams showed enhanced mechanical, thermal, and insulating properties compared to foams prepared solely with petrochemical polyol. The addition of up to 30 wt% of biopolyol did not significantly affect the chemical structure and average cell size. With the increase in IISO, a slight decrease in processing times and mechanical properties was observed. As expected, foams with higher IISO exhibited a higher relative concentration of polyisocyanurate groups in their chemical structure, which was confirmed using principal component analysis (PCA).

ACS Style

Paulina Kosmela; Aleksander Hejna; Jan Suchorzewski; Łukasz Piszczyk; Józef Tadeusz Haponiuk. Study on the Structure-Property Dependences of Rigid PUR-PIR Foams Obtained from Marine Biomass-Based Biopolyol. Materials 2020, 13, 1257 .

AMA Style

Paulina Kosmela, Aleksander Hejna, Jan Suchorzewski, Łukasz Piszczyk, Józef Tadeusz Haponiuk. Study on the Structure-Property Dependences of Rigid PUR-PIR Foams Obtained from Marine Biomass-Based Biopolyol. Materials. 2020; 13 (5):1257.

Chicago/Turabian Style

Paulina Kosmela; Aleksander Hejna; Jan Suchorzewski; Łukasz Piszczyk; Józef Tadeusz Haponiuk. 2020. "Study on the Structure-Property Dependences of Rigid PUR-PIR Foams Obtained from Marine Biomass-Based Biopolyol." Materials 13, no. 5: 1257.

Journal article
Published: 03 March 2020 in Polymers
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The application of wastes as a filler/reinforcement phase in polymers is a new strategy to modify the performance properties and reduce the price of biocomposites. The use of these fillers, coming from agricultural waste (cellulose/lignocellulose-based fillers) and waste rubbers, constitutes a method for the management of post-consumer waste. In this paper, highly-filled biocomposites based on natural rubber (NR) and ground tire rubber (GTR)/brewers’ spent grain (BSG) hybrid reinforcements, were prepared using two different curing systems: (i) sulfur-based and (ii) dicumyl peroxide (DCP). The influence of the amount of fillers (in 100/0, 50/50, and 0/100 ratios in parts per hundred of rubber) and type of curing system on the final properties of biocomposites was evaluated by the oscillating disc rheometer, Fourier-transform infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy, swelling behavior, tensile testing, and impedance tube measurements. The results show, that the scorch time and the optimum curing time values of sulfur cured biocomposites are affected by the change of the hybrid filler ratio while using the DCP curing system, and the obtained values do not show significant variations. The results conclude that the biocomposites cured with sulfur have better physico-mechanical and acoustic absorption, and that the type of curing system does not influence their thermal stability. The overall analysis indicates that the difference in final properties of highly filled biocomposites cured with two different systems is mainly affected by the: (i) cross-linking efficiency, (ii) partial absorption and reactions between fillers and used additives, and (iii) affinity of additives to applied fillers.

ACS Style

Łukasz Zedler; Xavier Colom; Javier Cañavate; Mohammad Saeb; Józef T. Haponiuk; Krzysztof Formela. Investigating the Impact of Curing System on Structure-Property Relationship of Natural Rubber Modified with Brewery By-Product and Ground Tire Rubber. Polymers 2020, 12, 545 .

AMA Style

Łukasz Zedler, Xavier Colom, Javier Cañavate, Mohammad Saeb, Józef T. Haponiuk, Krzysztof Formela. Investigating the Impact of Curing System on Structure-Property Relationship of Natural Rubber Modified with Brewery By-Product and Ground Tire Rubber. Polymers. 2020; 12 (3):545.

Chicago/Turabian Style

Łukasz Zedler; Xavier Colom; Javier Cañavate; Mohammad Saeb; Józef T. Haponiuk; Krzysztof Formela. 2020. "Investigating the Impact of Curing System on Structure-Property Relationship of Natural Rubber Modified with Brewery By-Product and Ground Tire Rubber." Polymers 12, no. 3: 545.

Journal article
Published: 18 February 2020 in International Journal of Biological Macromolecules
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Natural materials have attracted increasing attention in wound dressing and food packaging process, which could overcome the serious environmental issues caused by conventional synthetic materials. Essential oils (EOs) such as black pepper essential oil (BPEO) and ginger essential oil (GEO) have extensively been reported for their nutritional and biomedical properties. In this study, biocomposite films based on polyvinyl alcohol (PVA), gum arabic (GA) and chitosan (CS) incorporated with BPEO and GEO were fabricated by solvent casting method. FTIR, XRD, SEM and DSC were performed with mechanical and antimicrobial properties of PVA/GA/CS films with and without BPEO and GEO. The BPEO-PVA/GA/CS film showed heterogeneous rough surface with cavities containing entrapment of BPEO droplets, whereas, the GEO-PVA/GA/CS film showed heterogeneous rough surface with coarseness due to the incorporation of respective EOs. The BPEO and GEO incorporated PVA/GA/CS films were considerable resistant to breakage and flexible with improved heat stability. The BPEO and GEO incorporated PVA/GA/CS films were significantly inhibited the growth of Bacillus cereus, Staphylococcus aureus, Escherichia coli and Salmonella typhimurium. The obtained results have demonstrated that both BPEO and GEO incorporated PVA/GA/CS films are promising alternatives to wound dressing and food packaging materials.

ACS Style

Augustine Amalraj; Józef Haponiuk; Sabu Thomas; Sreeraj Gopi. Preparation, characterization and antimicrobial activity of polyvinyl alcohol/gum arabic/chitosan composite films incorporated with black pepper essential oil and ginger essential oil. International Journal of Biological Macromolecules 2020, 151, 366 -375.

AMA Style

Augustine Amalraj, Józef Haponiuk, Sabu Thomas, Sreeraj Gopi. Preparation, characterization and antimicrobial activity of polyvinyl alcohol/gum arabic/chitosan composite films incorporated with black pepper essential oil and ginger essential oil. International Journal of Biological Macromolecules. 2020; 151 ():366-375.

Chicago/Turabian Style

Augustine Amalraj; Józef Haponiuk; Sabu Thomas; Sreeraj Gopi. 2020. "Preparation, characterization and antimicrobial activity of polyvinyl alcohol/gum arabic/chitosan composite films incorporated with black pepper essential oil and ginger essential oil." International Journal of Biological Macromolecules 151, no. : 366-375.

Journal article
Published: 16 January 2020 in Polymers
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Poly(ε-caprolactone) (PCL) and poly(lactic acid) (PLA) blends were compatibilized by reactive blending and by copolymers formed during reaction in the solution. The reactive blending of PCL/PLA was performed using di-(2-tert-butyl-peroxyisopropyl)benzene (BIB) or dicumyl peroxide (DCP) as radical initiator. PCL-g-PLA copolymers were prepared using 1.0 wt. % of DCP or BIB via reaction in solution, which was investigated through a Fourier transform infrared spectrometry (FTIR) and nuclear magnetic resonance (NMR) in order to better understand the occurring mechanisms. The effect of different additions such as PCL-g-PLA copolymers, DCP, or BIB on the properties of PCL/PLA blends was studied. The unmodified PCL/PLA blends showed a sea-island morphology typical of incompatible blends, where PLA droplets were dispersed in the PCL matrix. Application of organic peroxides improved miscibility between PCL and PLA phases. A similar effect was observed for PCL/PLA blend compatibilized by PCL-g-PLA copolymer, where BIB was used as initiator. However, in case of application of the peroxides, the PCL/PLA blends were cross-linked, and it has been confirmed by the gel fraction and melt flow index measurements. The thermal and mechanical properties of the blends were also investigated by means of differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), dynamic mechanical analysis (DMA), and tensile strength.

ACS Style

Marta Przybysz-Romatowska; Józef Haponiuk; Krzysztof Formela. Poly(ε-Caprolactone)/Poly(Lactic Acid) Blends Compatibilized by Peroxide Initiators: Comparison of Two Strategies. Polymers 2020, 12, 228 .

AMA Style

Marta Przybysz-Romatowska, Józef Haponiuk, Krzysztof Formela. Poly(ε-Caprolactone)/Poly(Lactic Acid) Blends Compatibilized by Peroxide Initiators: Comparison of Two Strategies. Polymers. 2020; 12 (1):228.

Chicago/Turabian Style

Marta Przybysz-Romatowska; Józef Haponiuk; Krzysztof Formela. 2020. "Poly(ε-Caprolactone)/Poly(Lactic Acid) Blends Compatibilized by Peroxide Initiators: Comparison of Two Strategies." Polymers 12, no. 1: 228.

Journal article
Published: 04 January 2020 in Polymers
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The copolymerization of styrene (St) with a bioderived monomer, pentadecylphenyl methacrylate (PDPMA), via atom transfer radical polymerization (ATRP) was studied in this work. The copolymerization reactivity ratio was calculated using the composition data obtained from 1H NMR spectroscopy, applying Kelen-Tudos and Finemann-Ross methods. The reactivity ratio of styrene (r1 = 0.93) and PDPMA (r2 = 0.05) suggested random copolymerization of the two monomers with alternation. The copolymerization conversion increased with increasing PDPMA concentration of the feed, upto 70 wt % PDPMA, but decreased thereafter. The molecular weight determined by gel permeation chromatography was lower than the theoretical values and the polydispersity increased from 1.32 to 2.19, with increasing PDPMA content in the feed. The influence of styrene content on the glass transition and thermal decomposition behavior of the copolymers was studied by differential scanning calorimetry (DSC) and thermogravimetric analysis, respectively. Morphological characterization by transmission electron microscopy (TEM) revealed a phase separated soft core-hard shell type structure. The complex viscosity and adhesion properties like peel strength and lap shear strength of the copolymer on different substrates increased with increasing styrene content.

ACS Style

Tomy Muringayil Joseph; Sumi Murali Nair; Suresh Kattimuttathu Ittara; Józef T. Haponiuk; Sabu Thomas. Copolymerization of Styrene and Pentadecylphenylmethacrylate (PDPMA): Synthesis, Characterization, Thermomechanical and Adhesion Properties. Polymers 2020, 12, 97 .

AMA Style

Tomy Muringayil Joseph, Sumi Murali Nair, Suresh Kattimuttathu Ittara, Józef T. Haponiuk, Sabu Thomas. Copolymerization of Styrene and Pentadecylphenylmethacrylate (PDPMA): Synthesis, Characterization, Thermomechanical and Adhesion Properties. Polymers. 2020; 12 (1):97.

Chicago/Turabian Style

Tomy Muringayil Joseph; Sumi Murali Nair; Suresh Kattimuttathu Ittara; Józef T. Haponiuk; Sabu Thomas. 2020. "Copolymerization of Styrene and Pentadecylphenylmethacrylate (PDPMA): Synthesis, Characterization, Thermomechanical and Adhesion Properties." Polymers 12, no. 1: 97.

Original
Published: 24 December 2019 in Wood Science and Technology
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Liquefaction of wood-based biomass gives different polyol properties depending on the reagents used. In this article, alder wood sawdust was liquefied with glycerol and poly(ethylene glycol) solvents. Liquefaction reactions were carried out at temperatures of 120, 150 and 170 °C. The obtained bio-polyols were analyzed in order to establish the process efficiency, hydroxyl number, acid value, viscosity and structural characteristics using Fourier transform infrared (FTIR), carbon (13C) and proton (1H) NMR analyses. The results indicate that the optimal conditions for the liquefaction process are at 150 °C for 6 h. The results of the FTIR spectra analysis and the hydroxyl number in the range of 214–687 mg KOH/g showed that the obtained bio-polyols are a potential substitute for petrochemical polyols commonly used for the synthesis of polyurethane polymers. Polyurethane resins containing 90 wt% of bio-polyol were obtained by a one-step method using a hydraulic press. The material was pressed for 15 min (5 MPa) at 100 °C with an NCO/OH ratio in the range of 0.9–1.2. Dynamic mechanical thermal analysis (DMA) showed high cross-linking density and modulus of elasticity in a wide range of 62–1362 MPa.

ACS Style

Kamila Gosz; Daria Kowalkowska-Zedler; Józef Haponiuk; Łukasz Piszczyk. Liquefaction of alder wood as the source of renewable and sustainable polyols for preparation of polyurethane resins. Wood Science and Technology 2019, 54, 103 -121.

AMA Style

Kamila Gosz, Daria Kowalkowska-Zedler, Józef Haponiuk, Łukasz Piszczyk. Liquefaction of alder wood as the source of renewable and sustainable polyols for preparation of polyurethane resins. Wood Science and Technology. 2019; 54 (1):103-121.

Chicago/Turabian Style

Kamila Gosz; Daria Kowalkowska-Zedler; Józef Haponiuk; Łukasz Piszczyk. 2019. "Liquefaction of alder wood as the source of renewable and sustainable polyols for preparation of polyurethane resins." Wood Science and Technology 54, no. 1: 103-121.

Journal article
Published: 20 December 2019 in Journal of Composites Science
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Ground tire rubber (GTR) was mechano-chemically modified using a road bitumen 100/150 and two types of organic peroxides: di-(2-tert-butyl-peroxyisopropyl)-benzene (BIB) and dicumyl peroxide (DCP). The impact of used additives on reactive sintering efficiency and physico-mechanical properties of modified GTR was investigated using oscillating disc rheometer measurements, followed by tensile tests and swelling behavior studies. It was found that the application of bitumen and both used peroxides (DCP/BIB) improves processing and reactive sintering efficiency better than untreated GTR. However, the results indicate that BIB is more prone to blooming on the surface of modified GTR, thus limiting (especially at higher content) its application as a modifier and promotor of GTR reactive sintering.

ACS Style

Łukasz Zedler; Marta Przybysz-Romatowska; Józef Haponiuk; Shifeng Wang; Krzysztof Formela. Modification of Ground Tire Rubber—Promising Approach for Development of Green Composites. Journal of Composites Science 2019, 4, 2 .

AMA Style

Łukasz Zedler, Marta Przybysz-Romatowska, Józef Haponiuk, Shifeng Wang, Krzysztof Formela. Modification of Ground Tire Rubber—Promising Approach for Development of Green Composites. Journal of Composites Science. 2019; 4 (1):2.

Chicago/Turabian Style

Łukasz Zedler; Marta Przybysz-Romatowska; Józef Haponiuk; Shifeng Wang; Krzysztof Formela. 2019. "Modification of Ground Tire Rubber—Promising Approach for Development of Green Composites." Journal of Composites Science 4, no. 1: 2.

Journal article
Published: 12 October 2019 in Materials Today Communications
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Bionanocomposites prepared from green sources are a promising research area and cellulose nanofibers obtained from agro-waste of ginger rhizomes and their different composites with starch, chitosan (CS) and polyvinyl alcohol (PVA) have exhibited enormous mechanical as well as antimicrobial properties. This paper reports the synthesis of magnetic ginger nanofiber (M-GNF) reinforced composite films with CS, PVA and potato starch (PS) by Fe3O4 nanoparticles by in-situ co-precipitation method. These magnetic composite films were prepared by simple casting method and the magnetic properties were analysed by magnetic susceptibility measurements using Vibrating Sample Magnetometer (VSM), surface morphology and structural analysis were analysed by Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), Differential scanning calorimetry (DSC) and X-ray diffraction (XRD) methods. The magnetic composites incorporated with GNF were thermally stable, mechanically strong, insoluble in water and easily removable from water by external magnetic field. These magnetic composites were explored as an adsorbent for removing copper (II) ions from aqueous solution and the M-GNF-CS composite exhibited highest effective removal performance for Cu (II) than the others.

ACS Style

Joby Jacob; Gregary Peter; Sabu Thomas; Józef T. Haponiuk; Sreeraj Gopi. In-situ synthesis and characterization of biocompatible magnetic ginger nanofiber composites for copper (II) removal from water. Materials Today Communications 2019, 21, 100690 .

AMA Style

Joby Jacob, Gregary Peter, Sabu Thomas, Józef T. Haponiuk, Sreeraj Gopi. In-situ synthesis and characterization of biocompatible magnetic ginger nanofiber composites for copper (II) removal from water. Materials Today Communications. 2019; 21 ():100690.

Chicago/Turabian Style

Joby Jacob; Gregary Peter; Sabu Thomas; Józef T. Haponiuk; Sreeraj Gopi. 2019. "In-situ synthesis and characterization of biocompatible magnetic ginger nanofiber composites for copper (II) removal from water." Materials Today Communications 21, no. : 100690.

Journal article
Published: 28 June 2019 in Polymers
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The modification of poly(ε-caprolactone) (PCL) was successfully conducted during reactive processing in the presence of dicumyl peroxide (DCP) or di-(2-tert-butyl-peroxyisopropyl)-benzene (BIB). The peroxide initiators were applied in the various amounts of 0.5 or 1.0 pbw (part by weight) into the PCL matrix. The effects of the initiator type and its concentration on the structure and mechanical and thermal properties of PCL were investigated. To achieve a detailed and proper explication of this phenomenon, the decomposition and melting temperatures of DCP and BIB initiators were measured by differential scanning calorimetry. The conjecture of the branching or cross-linking of PCL structure via used peroxides was studied by gel fraction content measurement. Modification in the presence of BIB in PCL was found to effectively increase gel fraction. The result showed that the cross-linking of PCL started at a low content of BIB, while PCL modified by high DCP content was only partially cross-linked or branched. PCL branching and cross-linking were found to have a significant impact on the mechanical properties of PCL. However, the effect of used initiators on poly(ε-caprolactone) properties strongly depended on their structure and content. The obtained results indicated that, for the modification towards cross-linking/branching of PCL structure by using organic peroxides, the best mechanical properties were achieved for PCL modified by 0.5 pbw BIB or 1.0 pbw DCP, while the PCL modified by 1.0 pbw BIB possessed poor mechanical properties, as it was related to over cross-linking.

ACS Style

Marta Przybysz; Aleksander Hejna; Józef Haponiuk; Krzysztof Formela. Structural and Thermo-Mechanical Properties of Poly(ε-caprolactone) Modified by Various Peroxide Initiators. Polymers 2019, 11, 1101 .

AMA Style

Marta Przybysz, Aleksander Hejna, Józef Haponiuk, Krzysztof Formela. Structural and Thermo-Mechanical Properties of Poly(ε-caprolactone) Modified by Various Peroxide Initiators. Polymers. 2019; 11 (7):1101.

Chicago/Turabian Style

Marta Przybysz; Aleksander Hejna; Józef Haponiuk; Krzysztof Formela. 2019. "Structural and Thermo-Mechanical Properties of Poly(ε-caprolactone) Modified by Various Peroxide Initiators." Polymers 11, no. 7: 1101.

Original research
Published: 30 May 2019 in Cellulose
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In this work, liquefied biomass from the Baltic Sea was used for the preparation of rigid polyurethane (PUR) foams. The biomass contained 10 wt% of Enteromorpha macroalgae and 90 wt% of Zostera marina seagrass characterized by a high content of cellulose. The influence of time, temperature and the type of solvent on the efficiency of the liquefaction process and properties of biopolyols was determined. Obtained materials were analyzed in terms of chemical structure, rheological properties, thermal stability and basic physical and mechanical properties. It was found that optimal parameters for liquefaction of used biomass were: temperature of 150 °C, reaction time of 6 h and a solvent mixture containing glycerol and poly(ethylene glycol) in ratio of 50:50 (biopolyol 50G50P_150). Under these conditions, 78 wt% of biomass was liquefied and resulting biopolyol was characterized by a hydroxyl number of 650 mg KOH/g. Depending on the used solvent mixture and the liquefaction temperature, biopolyols showed the character of Newtonian or non-Newtonian liquids. Rigid PUR foams were obtained by substitution of petrochemical polyol with 10, 20 and 30 wt% of biopolyol. It was found that the addition of biopolyol to foams’ formulations did not cause significant changes in their chemical structure, while mechanical strength and thermal stability were enhanced. The presented study confirms that biomass from the Baltic Sea can be used for the synthesis of biopolyols and rigid polyurethane foams.

ACS Style

Paulina Kosmela; Kamila Gosz; Paweł Kazimierski; Aleksander Hejna; Józef Haponiuk; Łukasz Piszczyk. Chemical structures, rheological and physical properties of biopolyols prepared via solvothermal liquefaction of Enteromorpha and Zostera marina biomass. Cellulose 2019, 26, 5893 -5912.

AMA Style

Paulina Kosmela, Kamila Gosz, Paweł Kazimierski, Aleksander Hejna, Józef Haponiuk, Łukasz Piszczyk. Chemical structures, rheological and physical properties of biopolyols prepared via solvothermal liquefaction of Enteromorpha and Zostera marina biomass. Cellulose. 2019; 26 (10):5893-5912.

Chicago/Turabian Style

Paulina Kosmela; Kamila Gosz; Paweł Kazimierski; Aleksander Hejna; Józef Haponiuk; Łukasz Piszczyk. 2019. "Chemical structures, rheological and physical properties of biopolyols prepared via solvothermal liquefaction of Enteromorpha and Zostera marina biomass." Cellulose 26, no. 10: 5893-5912.

Journal article
Published: 01 May 2019 in International Journal of Biological Macromolecules
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The agro-industrial waste obtained after the isolation of bio-constituents from ginger is available in abundance. In the present study, the effective isolation of ginger nanofibers (GNF) was carried out by acid hydrolysis and high pressure homogenization to get cellulose nanofibers with 100 to 200 nm width. Bionanocomposites were also prepared by reinforcing different ratios of (1% to 7%) GNF with chitosan (CS) and polyvinyl alcohol (PVA) matrices by solvent cast method and the 5% GNF with CS and PVA resulted a high mechanical strength composites than others. The surface morphology and structural analysis of the composites were identified by Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), Differential scanning calorimetry (DSC) and X-ray diffraction (XRD) methods. The inhibitory effect of 5% GNF bionanocomposites against Bacillus cereus, Escherichia coli, Staphylococcus aureus and Salmonella typhimurium indicated good antibacterial activity of the nanocomposites due to the addition of GNF in the biopolymer matrices. The use of GNF will help to increase the economic values of agricultural waste and the characteristic properties of GNF derived bionanocomposites could be possibly used in medical and packaging areas.

ACS Style

Joby Jacob; Gregary Peter; Sabu Thomas; Józef Haponiuk; Sreeraj Gopi. Chitosan and polyvinyl alcohol nanocomposites with cellulose nanofibers from ginger rhizomes and its antimicrobial activities. International Journal of Biological Macromolecules 2019, 129, 370 -376.

AMA Style

Joby Jacob, Gregary Peter, Sabu Thomas, Józef Haponiuk, Sreeraj Gopi. Chitosan and polyvinyl alcohol nanocomposites with cellulose nanofibers from ginger rhizomes and its antimicrobial activities. International Journal of Biological Macromolecules. 2019; 129 ():370-376.

Chicago/Turabian Style

Joby Jacob; Gregary Peter; Sabu Thomas; Józef Haponiuk; Sreeraj Gopi. 2019. "Chitosan and polyvinyl alcohol nanocomposites with cellulose nanofibers from ginger rhizomes and its antimicrobial activities." International Journal of Biological Macromolecules 129, no. : 370-376.