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I obtained my master's degree in 1999 at the Gdańsk University of Technology, and my doctorate in 2010 at the Gdynia Maritime University. Postdoctoral degree I graduated in 2018 and I am currently working at the Maritime University of Gdynia as the UMG professor. From the beginning of my work, my research interests are focused on the synthesis and research of polyurethane properties. I am working on obtaining polyurethanes that undergo gradual degradation in the living organism and in the natural environment. The increase in degradability of polyurethanes was achieved by their chemical and physical modification with bioadditives - polyhydroxybutyrate, polylactide, starch and chitosan. I am a member of the Polish Chemical Society and the Polish Society of Commodity Science. I conduct classes and students' diploma theses in the field of chemistry and polymers.
The use of shrimp waste to obtain chitosan (Ch) is an essential issue, considering a circular economy, waste management, and its application to environmentally friendly materials. In this study, northern prawn shells were utilized to obtain Ch, which could then be used for synthesizing chitosan-based polyurethane (PUR+Ch) foams with different Ch concentration. The chemical structure, morphology, hardness, thermal properties, viscoelastic properties, and sorption properties in relation to oil and water of these materials were determined. The results present that the addition of Ch into PUR influences the physicochemical characteristics and properties of the tested materials. PUR+Ch foams with 1–3 wt% Ch had more open cells and were softer than neat PUR. PUR+Ch1 had the best thermal properties. PUR+Ch2 foam with 2 wt% Ch as a whole was characterized as having the highest water sorption. The PUR+Ch1 foam with 1 wt% Ch had the best oil sorption. This paper shows that the modification of PUR by Ch is a very promising solution, and PUR+Ch foams can be applied in the water treatment of oil spills, which can be dangerous to the water environment.
Agnieszka Piotrowska-Kirschling; Adam Olszewski; Jakub Karczewski; Łukasz Piszczyk; Joanna Brzeska. Synthesis and Physicochemical Characteristics of Chitosan-Based Polyurethane Flexible Foams. Processes 2021, 9, 1394 .
AMA StyleAgnieszka Piotrowska-Kirschling, Adam Olszewski, Jakub Karczewski, Łukasz Piszczyk, Joanna Brzeska. Synthesis and Physicochemical Characteristics of Chitosan-Based Polyurethane Flexible Foams. Processes. 2021; 9 (8):1394.
Chicago/Turabian StyleAgnieszka Piotrowska-Kirschling; Adam Olszewski; Jakub Karczewski; Łukasz Piszczyk; Joanna Brzeska. 2021. "Synthesis and Physicochemical Characteristics of Chitosan-Based Polyurethane Flexible Foams." Processes 9, no. 8: 1394.
Shrimp waste is a common waste in seafood processing. It is used as part of the fish meal which is added to feed. Bearing in mind the Green Deal and sustainability development, it was proposed to use northern prawn shells to obtain chitosan (Ch), which could then be used for polyurethane (PUR) modification. In ports, oil micro-spills often flow into the waters of gulfs and, consequently, into the sea. Systematic chemical and petroleum water pollution may pose a threat to flora and fauna. In this study, chitosan, which was obtained from shrimp shells, was used to synthesize polyurethane–chitosan foams (PUR+Ch) with different chitosan concentrations. Selected physico-chemical and sorption properties in relation to oil and water of these materials were determined. It was found that the amount of Ch added to the foam affected its morphology, hardness, density, and thermal and sorption properties. PUR foam with a 1.5% weight of Ch was characterized as having the highest water and oil sorption. The advantages of the tested material as an innovative product with potentially significant proecological values were estimated using strengths–weaknesses–opportunities–threats (SWOT) analysis. The conducted preliminary research made it possible to demonstrate the use of these materials in the processes of water treatment with the mentioned micropollutants.
Agnieszka Piotrowska-Kirschling; Katarzyna Szelągowska-Rudzka; Jakub Karczewski; Joanna Brzeska. Application of Shrimp Waste for the Synthesis of Polyurethane–Chitosan Materials with Potential Use in Sorption of Oil Micro-Spills in Water Treatment. Sustainability 2021, 13, 5098 .
AMA StyleAgnieszka Piotrowska-Kirschling, Katarzyna Szelągowska-Rudzka, Jakub Karczewski, Joanna Brzeska. Application of Shrimp Waste for the Synthesis of Polyurethane–Chitosan Materials with Potential Use in Sorption of Oil Micro-Spills in Water Treatment. Sustainability. 2021; 13 (9):5098.
Chicago/Turabian StyleAgnieszka Piotrowska-Kirschling; Katarzyna Szelągowska-Rudzka; Jakub Karczewski; Joanna Brzeska. 2021. "Application of Shrimp Waste for the Synthesis of Polyurethane–Chitosan Materials with Potential Use in Sorption of Oil Micro-Spills in Water Treatment." Sustainability 13, no. 9: 5098.
One of the methods of making traditional polymers more environmentally friendly is to modify them with natural materials or their biodegradable, synthetic equivalents. It was assumed that blends with polylactide (PLA), polysaccharides: chitosan (Ch) and starch (St) of branched polyurethane (PUR) based on synthetic poly([R,S]-3-hydroxybutyrate) (R,S-PHB) would degrade faster in the processes of hydrolysis and oxidation than pure PUR. For the sake of simplicity in the publication, all three modifiers: commercial PLA, Ch created by chemical modification of chitin and St are called bioadditives. The samples were incubated in a hydrolytic and oxidizing environment for 36 weeks and 11 weeks, respectively. The degradation process was assessed by observation of the chemical structure as well as the change in the mass of the samples, their molecular weight, surface morphology and thermal properties. It was found that the PUR samples with the highest amount of R,S-PHB and the lowest amount of polycaprolactone triol (PCLtriol) were degraded the most. Moreover, blending with St had the greatest impact on the susceptibility to degradation of PUR. However, the rate of weight loss of the samples was low, and after 36 weeks of incubation in the hydrolytic solution, it did not exceed 7% by weight. The weight loss of Ch and PLA blends was even smaller. However, a significant reduction in molecular weight, changes in morphology and changes in thermal properties indicated that the degradation of the samples should occur quickly after this time. Therefore, when using these polyurethanes and their blends, it should be taken into account that they should decompose slowly in their initial life. In summary, this process can be modified by changing the amount of R,S-PHB, the degree of cross-linking, and the type and amount of second blend component added (bioadditives).
Joanna Brzeska; Agnieszka Tercjak; Wanda Sikorska; Barbara Mendrek; Marek Kowalczuk; Maria Rutkowska. Degradability of Polyurethanes and Their Blends with Polylactide, Chitosan and Starch. Polymers 2021, 13, 1202 .
AMA StyleJoanna Brzeska, Agnieszka Tercjak, Wanda Sikorska, Barbara Mendrek, Marek Kowalczuk, Maria Rutkowska. Degradability of Polyurethanes and Their Blends with Polylactide, Chitosan and Starch. Polymers. 2021; 13 (8):1202.
Chicago/Turabian StyleJoanna Brzeska; Agnieszka Tercjak; Wanda Sikorska; Barbara Mendrek; Marek Kowalczuk; Maria Rutkowska. 2021. "Degradability of Polyurethanes and Their Blends with Polylactide, Chitosan and Starch." Polymers 13, no. 8: 1202.
Materials science is an interdisciplinary area of studies. This science focuses on the influence of the physico-chemical properties of materials on their application in human everyday lives. The materials’ synthesis should be developed in accordance with sustainable development. Polyurethanes (PUR) represent a significant consumption of plastic in the world. Modification of PUR, e.g., with polysaccharide of natural origin (chitosan, Chit), should have a positive effect on their functional properties and degradability in the natural environment. The basic parameters affecting the scope and direction of changes are the size and quantity of the chitosan particles. The impact assessment of chitosan on the chemical structure, morphology, thermal properties, crystallinity, mechanical properties, flammability, water sorption, adsorption properties, degradability, and biological activity of PUR/Chit composites (without other additives) is discussed in this article. To the best of our knowledge, recent literature does not contain a study discussing the direct impact of the presence of chitosan in the structure of PUR/Chit composite on its properties, regardless of the intended uses. This paper provides an overview of publications, which presents the results of a study on the effect of adding chitosan in polyurethane/chitosan composites without other additives on the properties of polyurethane.
Agnieszka Piotrowska-Kirschling; Joanna Brzeska. The Effect of Chitosan on the Chemical Structure, Morphology, and Selected Properties of Polyurethane/Chitosan Composites. Polymers 2020, 12, 1205 .
AMA StyleAgnieszka Piotrowska-Kirschling, Joanna Brzeska. The Effect of Chitosan on the Chemical Structure, Morphology, and Selected Properties of Polyurethane/Chitosan Composites. Polymers. 2020; 12 (5):1205.
Chicago/Turabian StyleAgnieszka Piotrowska-Kirschling; Joanna Brzeska. 2020. "The Effect of Chitosan on the Chemical Structure, Morphology, and Selected Properties of Polyurethane/Chitosan Composites." Polymers 12, no. 5: 1205.
The number of cross-links in the non-linear polyurethane structure is the basic factor affecting its properties. Selected properties of aliphatic polyurethanes with soft segments made of different amounts of polycaprolactonetriol, polycaprolactonediol and synthetic, telechelic poly([R,S]-3-hydroxybutyrate) were determined. On the basis of changes in polyurethane properties, the correlation between these properties and the construction of soft segments was found. The structure of polyurethanes, their morphology, hydrophilicity, thermal and mechanical properties were examined. These properties were changed linearly up to 15% content of polycaprolactonetriol in soft segments. A further increase in the amount of triol causes that these properties are mainly determined by the high number of cross-links.
Joanna Brzeska; Agnieszka Tercjak; Wanda Sikorska; Marek Kowalczuk; Maria Rutkowska. Predicted Studies of Branched and Cross-Linked Polyurethanes Based on Polyhydroxybutyrate with Polycaprolactone Triol in Soft Segments. Polymers 2020, 12, 1068 .
AMA StyleJoanna Brzeska, Agnieszka Tercjak, Wanda Sikorska, Marek Kowalczuk, Maria Rutkowska. Predicted Studies of Branched and Cross-Linked Polyurethanes Based on Polyhydroxybutyrate with Polycaprolactone Triol in Soft Segments. Polymers. 2020; 12 (5):1068.
Chicago/Turabian StyleJoanna Brzeska; Agnieszka Tercjak; Wanda Sikorska; Marek Kowalczuk; Maria Rutkowska. 2020. "Predicted Studies of Branched and Cross-Linked Polyurethanes Based on Polyhydroxybutyrate with Polycaprolactone Triol in Soft Segments." Polymers 12, no. 5: 1068.
The aim of this study is the analyze the structure of branched polyurethanes based on synthetic poly([R,S]-3-hydroxybutyrate) and their blends with biopolymers and montmorillonite. The properties which would predict the potential susceptibility of these materials to degradation are also estimated. Fourier-transform infrared spectroscopy with attenuated total reflection analysis shows that poly([d,l]-lactide) is on the surfaces of polyurethanes, whereas chitosan and starch are included inside the blend network. Atomic force microscopy images have shown that the surfaces of investigated samples are heterogenous with the formation of spherulites in case of pure polyurethanes. The presence of biopolymers in the blend reduced the crystallinity of polyurethanes. Thermal stability of blends of polyurethanes with poly([d,l]-lactide) and polysaccharides decreased in comparison to pure polyurethanes. Although the tensile strength is reduced after the blending of polyurethanes with biopolymers, the elongation at break increased, especially in the case of polyurethane/poly([d,l]-lactide) blends. The presence of polysaccharides in the obtained blends caused the significant reduction of contact angle after one minute from water drop immersion. This hydrophilizing effect is the highest when montmorillonite has been incorporated into the chitosan blend. The estimated properties of the obtained materials suggest their potential sensitivity on environmental conditions.
Joanna Brzeska; Agnieszka Tercjak; Wanda Sikorska; Marek Kowalczuk; Maria Rutkowska. Morphology and Physicochemical Properties of Branched Polyurethane/Biopolymer Blends. Polymers 2019, 12, 16 .
AMA StyleJoanna Brzeska, Agnieszka Tercjak, Wanda Sikorska, Marek Kowalczuk, Maria Rutkowska. Morphology and Physicochemical Properties of Branched Polyurethane/Biopolymer Blends. Polymers. 2019; 12 (1):16.
Chicago/Turabian StyleJoanna Brzeska; Agnieszka Tercjak; Wanda Sikorska; Marek Kowalczuk; Maria Rutkowska. 2019. "Morphology and Physicochemical Properties of Branched Polyurethane/Biopolymer Blends." Polymers 12, no. 1: 16.
Branched, aliphatic polyurethanes (PURs) were synthesized and compared to linear analogues. The influence of polycaprolactonetriol and synthetic poly([R,S]-3-hydroxybutyrate) (R,S-PHB) in soft segments on structure, thermal and sorptive properties of PURs was determined. Using FTIR and Raman spectroscopies it was found that increasing the R,S-PHB amount in the structure of branched PURs reduced a tendency of urethane groups to hydrogen bonding. Melting enthalpies (on DSC thermograms) of both soft and hard segments of linear PURs were higher than branched PURs, suggesting that linear PURs were more crystalline. Oil sorption by samples of linear and branched PURs, containing only polycaprolactone chains in soft segments, was higher than in the case of samples with R,S-PHB in their structure. Branched PUR without R,S-PHB absorbed the highest amount of oil. Introducing R,S-PHB into the PUR structure increased water sorption. Thus, by operating the number of branching and the amount of poly([R,S]-3-hydroxybutyrate) in soft segments thermal and sorptive properties of aliphatic PURs could be controlled.
Joanna Brzeska; Anna Maria Elert; Magda Morawska; Wanda Sikorska; Marek Kowalczuk; Maria Rutkowska. Branched Polyurethanes Based on Synthetic Polyhydroxybutyrate with Tunable Structure and Properties. Polymers 2018, 10, 826 .
AMA StyleJoanna Brzeska, Anna Maria Elert, Magda Morawska, Wanda Sikorska, Marek Kowalczuk, Maria Rutkowska. Branched Polyurethanes Based on Synthetic Polyhydroxybutyrate with Tunable Structure and Properties. Polymers. 2018; 10 (8):826.
Chicago/Turabian StyleJoanna Brzeska; Anna Maria Elert; Magda Morawska; Wanda Sikorska; Marek Kowalczuk; Maria Rutkowska. 2018. "Branched Polyurethanes Based on Synthetic Polyhydroxybutyrate with Tunable Structure and Properties." Polymers 10, no. 8: 826.
The surface morphology and thermal properties of polyurethanes can be correlated to their chemical composition. The hydrophilicity, surface morphology, and thermal properties of polyurethanes (differed in soft segments and in linear/cross-linked structure) were investigated. The influence of poly([R,S]-3-hydroxybutyrate) presence in soft segments and blending of polyurethane with polylactide on surface topography were also estimated. The linear polyurethanes (partially crystalline) had the granular surface, whereas the surface of cross-linked polyurethanes (almost amorphous) was smooth. Round aggregates of polylactide un-uniformly distributed in matrix of polyurethane were clearly visible. It was concluded that some modification of soft segment (by mixing of poly([R,S]-3-hydroxybutyrate) with different polydiols and polytriol) and blending of polyurethanes with small amount of polylactide influence on crystallinity and surface topography of obtained polyurethanes.
Joanna Brzeska; Magda Morawska; Aleksandra Heimowska; Wanda Sikorska; Wojciech Wałach; Anna Hercog; Marek Kowalczuk; Maria Rutkowska. The influence of chemical structure on thermal properties and surface morphology of polyurethane materials. Chemical Papers 2017, 72, 1249 -1256.
AMA StyleJoanna Brzeska, Magda Morawska, Aleksandra Heimowska, Wanda Sikorska, Wojciech Wałach, Anna Hercog, Marek Kowalczuk, Maria Rutkowska. The influence of chemical structure on thermal properties and surface morphology of polyurethane materials. Chemical Papers. 2017; 72 (5):1249-1256.
Chicago/Turabian StyleJoanna Brzeska; Magda Morawska; Aleksandra Heimowska; Wanda Sikorska; Wojciech Wałach; Anna Hercog; Marek Kowalczuk; Maria Rutkowska. 2017. "The influence of chemical structure on thermal properties and surface morphology of polyurethane materials." Chemical Papers 72, no. 5: 1249-1256.
Background: Cross-linking structure of polyurethanes determines no degradability of these materials. However, introducing the hydrolysable substrates (of natural or synthetic origin) into the cross-linked polyurethanes structure makes them biodegradable. Moreover compounds (such as polycaprolactone triol, glycerin, lysine triisocyanate, etc.) that are used for polyurethane cross-linking are degraded in non-toxic products. All these kinds of compounds can be introduced into soft or hard segments via urethane bonds. Objective: The review focuses on kind of multifunctional polyols and isocyanates, and low molecular crosslinkers used for cross-linked polyurethanes obtaining. These compounds are natural substrates (in the native state or after modification) or are synthetic compounds with degradable linkages. They belong to polyesters, plant oils, proteins, saccharides, and others (e.g. lignocellulosic materials), and they are synthesized chemically or via biosynthesis by algae, plants, microorganisms, and by animals. Conclusion: Incorporation of degradable groups (such as ester moieties) into the polymer structure, and using of substrates with the structure known and metabolized by microorganisms for soft or hard segments building, facilitate degradation of cross-linked polyurethanes.
Joanna Brzeska. Biodegradable Polyurethanes Cross-Linked by Multifunctional Compounds. Current Organic Synthesis 2017, 14, 778 -784.
AMA StyleJoanna Brzeska. Biodegradable Polyurethanes Cross-Linked by Multifunctional Compounds. Current Organic Synthesis. 2017; 14 (6):778-784.
Chicago/Turabian StyleJoanna Brzeska. 2017. "Biodegradable Polyurethanes Cross-Linked by Multifunctional Compounds." Current Organic Synthesis 14, no. 6: 778-784.
The journal "Polimery", of international circulation, is publishing peerreviewed scientific and technical research papers covering polymer science and technology in the field of plastics, rubbers, chemical fibres and paints.
Joanna Brzeska; Magda Morawska; Aleksandra Heimowska; Wanda Sikorska; Agnieszka Tercjak; Marek Kowalczuk; Maria Rutkowska. Degradability of cross-linked polyurethanes/chitosan composites. Polimery 2017, 62, 567 -575.
AMA StyleJoanna Brzeska, Magda Morawska, Aleksandra Heimowska, Wanda Sikorska, Agnieszka Tercjak, Marek Kowalczuk, Maria Rutkowska. Degradability of cross-linked polyurethanes/chitosan composites. Polimery. 2017; 62 (7/8):567-575.
Chicago/Turabian StyleJoanna Brzeska; Magda Morawska; Aleksandra Heimowska; Wanda Sikorska; Agnieszka Tercjak; Marek Kowalczuk; Maria Rutkowska. 2017. "Degradability of cross-linked polyurethanes/chitosan composites." Polimery 62, no. 7/8: 567-575.
In many areas of application of conventional non-degradable cross-linked polyurethanes (PUR), there is a need for their degradation under the influence of specific environmental factors. It is practiced by incorporation of sensitive to degradation compounds (usually of natural origin) into the polyurethane structure, or by mixing them with polyurethanes. Cross-linked polyurethanes (with 10 and 30%wt amount of synthetic poly([R,S]-3-hydroxybutyrate) (R,S-PHB) in soft segments) and their physical blends with poly([d,l]-lactide) (PDLLA) were investigated and then degraded under hydrolytic (phosphate buffer solution) and oxidative (CoCl2/H2O2) conditions. The rate of degradation was monitored by changes of samples mass, morphology of surface and their thermal properties. Despite the small weight losses of samples, the changes of thermal properties of polymers and topography of their surface indicated that they were susceptible to gradual degradation under oxidative and hydrolytic conditions. Blends of PDLLA and polyurethane with 30 wt% of R,S-PHB in soft segments and PUR/PDLLA blends absorbed more water and degraded faster than polyurethane with low amount of R,S-PHB.
Joanna Brzeska; Magda Morawska; Wanda Sikorska; Agnieszka Tercjak; Marek Kowalczuk; Maria Rutkowska. Degradability of cross-linked polyurethanes based on synthetic polyhydroxybutyrate and modified with polylactide. Chemical Papers 2017, 71, 2243 -2251.
AMA StyleJoanna Brzeska, Magda Morawska, Wanda Sikorska, Agnieszka Tercjak, Marek Kowalczuk, Maria Rutkowska. Degradability of cross-linked polyurethanes based on synthetic polyhydroxybutyrate and modified with polylactide. Chemical Papers. 2017; 71 (11):2243-2251.
Chicago/Turabian StyleJoanna Brzeska; Magda Morawska; Wanda Sikorska; Agnieszka Tercjak; Marek Kowalczuk; Maria Rutkowska. 2017. "Degradability of cross-linked polyurethanes based on synthetic polyhydroxybutyrate and modified with polylactide." Chemical Papers 71, no. 11: 2243-2251.
Synthesis and Properties of Polyurethanes Based on Synthetic Polyhydroxybutyrate for Medical Application | InTechOpen, Published on: 2015-11-26. Authors: Joanna Brzeska
Joanna Brzeska. Synthesis and Properties of Polyurethanes Based on Synthetic Polyhydroxybutyrate for Medical Application. Thermoplastic Elastomers - Synthesis and Applications 2015, 1 .
AMA StyleJoanna Brzeska. Synthesis and Properties of Polyurethanes Based on Synthetic Polyhydroxybutyrate for Medical Application. Thermoplastic Elastomers - Synthesis and Applications. 2015; ():1.
Chicago/Turabian StyleJoanna Brzeska. 2015. "Synthesis and Properties of Polyurethanes Based on Synthetic Polyhydroxybutyrate for Medical Application." Thermoplastic Elastomers - Synthesis and Applications , no. : 1.
Polyether-esterurethanes containing synthetic poly[(R,S)-3-hydroxybutyrate] (R,S-PHB) and polyoxytetramethylenediol in soft segments and polyesterurethanes with poly(ε-caprolactone) and poly[(R,S)-3-hydroxybutyrate] were blended with poly([D,L]-lactide) (PLA). The products were tested in terms of their oil and water absorption. Oil sorption tests of polyether-esterurethane revealed their higher response in comparison to polyesterurethanes. Blending of polyether-esterurethanes with PLA caused the increase of oil sorption. The highest water sorption was observed for blends of polyether-esterurethane, obtained with 10% of R,S-PHB in soft segments. The samples mass of polyurethanes and their blends were almost not changed after incubation in phosphate buffer and trypsin and lipase solutions. Nevertheless the molecular weight of polymers was significantly reduced after degradation. It was especially visible in case of incubation of samples in phosphate buffer what suggested the chemical hydrolysis of polymer chains. The changes of surface of polyurethanes and their blends, after incubation in both enzymatic solutions, indicated on enzymatic degradation, which had been started despite the lack of mass lost. Polyurethanes and their blends, contained more R,S-PHB in soft segments, were degraded faster.
Joanna Brzeska; Aleksandra Heimowska; Wanda Sikorska; Lidia Jasinska-Walc; Marek Kowalczuk; Maria Rutkowska. Chemical and Enzymatic Hydrolysis of Polyurethane/Polylactide Blends. International Journal of Polymer Science 2015, 2015, 1 -8.
AMA StyleJoanna Brzeska, Aleksandra Heimowska, Wanda Sikorska, Lidia Jasinska-Walc, Marek Kowalczuk, Maria Rutkowska. Chemical and Enzymatic Hydrolysis of Polyurethane/Polylactide Blends. International Journal of Polymer Science. 2015; 2015 ():1-8.
Chicago/Turabian StyleJoanna Brzeska; Aleksandra Heimowska; Wanda Sikorska; Lidia Jasinska-Walc; Marek Kowalczuk; Maria Rutkowska. 2015. "Chemical and Enzymatic Hydrolysis of Polyurethane/Polylactide Blends." International Journal of Polymer Science 2015, no. : 1-8.
The journal "Polimery", of international circulation, is publishing peerreviewed scientific and technical research papers covering polymer science and technology in the field of plastics, rubbers, chemical fibres and paints.
Joanna Brzeska; Aleksandra Heimowska; Magda Morawska; Amina Niepsuj; Wanda Sikorska; Marek Kowalczuk; Maria Rutkowska. Composites of polyurethanes based on poly([R,S]-3-hydroxybutyrate) with chitosan. Polimery 2015, 60, 391 -395.
AMA StyleJoanna Brzeska, Aleksandra Heimowska, Magda Morawska, Amina Niepsuj, Wanda Sikorska, Marek Kowalczuk, Maria Rutkowska. Composites of polyurethanes based on poly([R,S]-3-hydroxybutyrate) with chitosan. Polimery. 2015; 60 (6):391-395.
Chicago/Turabian StyleJoanna Brzeska; Aleksandra Heimowska; Magda Morawska; Amina Niepsuj; Wanda Sikorska; Marek Kowalczuk; Maria Rutkowska. 2015. "Composites of polyurethanes based on poly([R,S]-3-hydroxybutyrate) with chitosan." Polimery 60, no. 6: 391-395.
The aim of the present study was to determine the degradability of aliphatic polyurethanes, based on a different amount of synthetic, atactic poly[(R,S)-3-hydroxybutyrate] (a-PHB), in hydrolytic (phosphate buffer) and oxidative (H2O2/CoCl2) solutions. The soft segments were built with atactic poly[(R,S)-3-hydroxybutyrate] and polycaprolactone or polyoxytetramethylenediols, whereas hard segments were the reaction product of 4,4'-methylenedicyclohexyl diisocyanate and 1,4-butanediol.The selected properties - density and morphology of polymer surfaces - which could influence the sensitivity of polymers to degradation processes - were analyzed.The analysis of molecular mass (GPC), thermal properties (DSC) and the sample weight changes were undertaken to estimate the degree of degradability of polymer samples after incubation in environments studied.Investigated polyurethanes were amorphous with the very low amount of crystalline phases of hard segments.The polyurethane synthesized with a poly[(R,S)-3-hydroxybutyrate] and polyoxytetramethylenediol at a molar ratio of NCO:OH=3.7:1 (prepolymer step) appeared as the most sensitive for both degradative solutions. Its weight and molecular mass losses were the highest in comparison to other investigated polyurethanes.It could be expected that playing with the amount of poly[(R,S)-3-hydroxybutyrate] in polyurethane synthesis the rate of polyurethane degradation after immersion in living body would be modeled.
J. Brzeska; H. Janeczek; H. Janik; M. Kowalczuk; M. Rutkowska. Degradability in vitro of polyurethanes based on synthetic atactic poly[(R,S)-3-hydroxybutyrate]. Bio-Medical Materials and Engineering 2015, 25, 117 -125.
AMA StyleJ. Brzeska, H. Janeczek, H. Janik, M. Kowalczuk, M. Rutkowska. Degradability in vitro of polyurethanes based on synthetic atactic poly[(R,S)-3-hydroxybutyrate]. Bio-Medical Materials and Engineering. 2015; 25 (2):117-125.
Chicago/Turabian StyleJ. Brzeska; H. Janeczek; H. Janik; M. Kowalczuk; M. Rutkowska. 2015. "Degradability in vitro of polyurethanes based on synthetic atactic poly[(R,S)-3-hydroxybutyrate]." Bio-Medical Materials and Engineering 25, no. 2: 117-125.
Joanna Brzeska; Piotr Dacko; Henryk Janeczek; Helena Janik; Wanda Sikorska; Maria Rutkowska; Marek Kowalczuk. Synthesis, properties and applications of new (bio)degradable polyester urethanes. Polimery 2014, 59, 365 -371.
AMA StyleJoanna Brzeska, Piotr Dacko, Henryk Janeczek, Helena Janik, Wanda Sikorska, Maria Rutkowska, Marek Kowalczuk. Synthesis, properties and applications of new (bio)degradable polyester urethanes. Polimery. 2014; 59 (5):365-371.
Chicago/Turabian StyleJoanna Brzeska; Piotr Dacko; Henryk Janeczek; Helena Janik; Wanda Sikorska; Maria Rutkowska; Marek Kowalczuk. 2014. "Synthesis, properties and applications of new (bio)degradable polyester urethanes." Polimery 59, no. 5: 365-371.
The aliphatic polyurethanes based on atactic poly[(R,S)-3-hydroxybutyrate] (a-PHB) and commercial oligomerols: poly(ε-caprolactone)diol and polyoxytetramethylenediol were investigated. a-PHB was obtained by anionic ring-opening polymerization of (R,S)-β-butyrolactone. The 4,4′-methylenedicyclohexyl diisocyanate and 1,4-butanediol were used as contributors of hard segments. The aim of the study was to determine the influence of synthetic, atactic a-PHB in soft segments of polyurethanes on their degradability in simulated body fluids (SBF) and Ringer solution. The incubation of polymer samples in both degradative solutions was carried out for 36 weeks. It was concluded that the presence of a-PHB in polyurethane structure accelerated their degradation in SBF and in Ringer solution and, protected the calcification process.
Joanna Brzeska; Aleksandra Heimowska; Henryk Janeczek; Marek Kowalczuk; Maria Rutkowska. Polyurethanes Based on Atactic Poly[(R,S)-3-hydroxybutyrate]: Preliminary Degradation Studies in Simulated Body Fluids. Journal of Polymers and the Environment 2014, 22, 176 -182.
AMA StyleJoanna Brzeska, Aleksandra Heimowska, Henryk Janeczek, Marek Kowalczuk, Maria Rutkowska. Polyurethanes Based on Atactic Poly[(R,S)-3-hydroxybutyrate]: Preliminary Degradation Studies in Simulated Body Fluids. Journal of Polymers and the Environment. 2014; 22 (2):176-182.
Chicago/Turabian StyleJoanna Brzeska; Aleksandra Heimowska; Henryk Janeczek; Marek Kowalczuk; Maria Rutkowska. 2014. "Polyurethanes Based on Atactic Poly[(R,S)-3-hydroxybutyrate]: Preliminary Degradation Studies in Simulated Body Fluids." Journal of Polymers and the Environment 22, no. 2: 176-182.
Novel polyurethanes based on synthetic, atactic poly[(R, S)-3-hydroxybutyrate] (a-PHB) and polycaprolactone (PCL) or polyoxytetramethylene (PTMG) diols were synthesized. It was shown that the presence of a-PHB within soft segments reduces crystallinity of PUR. Because of the low melting temperature for polyurethanes with PCL in soft segments, at this stage of work, electrospinning was limited to polyurethanes containing PTMG and a-PHB. Polyurethane containing 80% of PTMG and 20% of a-PHB was electrospun at various parameters from hexafluoro-2-propanole solution, resulting in formation of fibers with the average diameter ca. 2 μm. The fiber diameter decreased with decreasing polymer concentration in a solution and was practically insensitive to the needle-collector distance in the applied range of distances.
Paweł Sajkiewicz; J. Brzeska; Piotr Denis; W. Sikorska; M. Kowalczuk; M. Rutkowska. The preliminary studies of a structure and electrospinning of new polyurethanes based on synthetic atactic poly[(R, S)-3-hydroxybutyrate]. Bulletin of the Polish Academy of Sciences: Technical Sciences 2014, 62, 55 -60.
AMA StylePaweł Sajkiewicz, J. Brzeska, Piotr Denis, W. Sikorska, M. Kowalczuk, M. Rutkowska. The preliminary studies of a structure and electrospinning of new polyurethanes based on synthetic atactic poly[(R, S)-3-hydroxybutyrate]. Bulletin of the Polish Academy of Sciences: Technical Sciences. 2014; 62 (1):55-60.
Chicago/Turabian StylePaweł Sajkiewicz; J. Brzeska; Piotr Denis; W. Sikorska; M. Kowalczuk; M. Rutkowska. 2014. "The preliminary studies of a structure and electrospinning of new polyurethanes based on synthetic atactic poly[(R, S)-3-hydroxybutyrate]." Bulletin of the Polish Academy of Sciences: Technical Sciences 62, no. 1: 55-60.
The aim of this study was to estimate the structure of new polyurethanes with the potential to be used in medicine. Atactic poly[(R,S)‐3‐hydroxybutyrate], obtained via a ring‐opening polymerization, and polycaprolactonediol or polyoxytetramethylenediol were used to built the soft segments. 4,4′‐methylene dicyclohexyl diisocyanate and 1,4‐butanediol were the components to form hard segments. At FTIR spectra of obtained polyurethanes the bands attributed to NCO groups completely disappeared, similarly as these of OH groups and the new band characteristic for stretching vibrations of bonded urethane NH groups appeared. Polyurethanes with low‐molecular weight were obtained. The observation of FTIR and 1H‐NMR spectra had been suggested that NH groups form two types of hydrogen bonds: with CO urethane (possibly with ester group) and ether groups. An addition of poly[(R,S)‐3‐hydroxybutyrate] caused the slight increase in number of urethane–urethane hydrogen bonds. For some of polyurethanes (based on polyoxytetramethylenediol) the allophanate structures were obtained. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
Joanna Brzeska; Piotr Dacko; Katarzyna Gebarowska; Helena Janik; Bożena Kaczmarczyk; Janusz Kasperczyk; Marek Kowalczuk; Maria Rutkowska. The structure of novel polyurethanes containing synthetic poly[(R,S)-3-hydroxybutyrate]. Journal of Polymer Science 2012, 125, 4285 -4291.
AMA StyleJoanna Brzeska, Piotr Dacko, Katarzyna Gebarowska, Helena Janik, Bożena Kaczmarczyk, Janusz Kasperczyk, Marek Kowalczuk, Maria Rutkowska. The structure of novel polyurethanes containing synthetic poly[(R,S)-3-hydroxybutyrate]. Journal of Polymer Science. 2012; 125 (6):4285-4291.
Chicago/Turabian StyleJoanna Brzeska; Piotr Dacko; Katarzyna Gebarowska; Helena Janik; Bożena Kaczmarczyk; Janusz Kasperczyk; Marek Kowalczuk; Maria Rutkowska. 2012. "The structure of novel polyurethanes containing synthetic poly[(R,S)-3-hydroxybutyrate]." Journal of Polymer Science 125, no. 6: 4285-4291.
Joanna Brzeska; Piotr Dacko; Henryk Janeczek; Marek Kowalczuk; Helena Janik; Maria Rutkowska. The influence of synthetic polyhydroxybutyrate on selected properties of novel polyurethanes for applications in medicine. Part II. Polyurethanes containing cycloaliphatic diisocyanates in the hard segment. Polimery 2011, 56, 27 -34.
AMA StyleJoanna Brzeska, Piotr Dacko, Henryk Janeczek, Marek Kowalczuk, Helena Janik, Maria Rutkowska. The influence of synthetic polyhydroxybutyrate on selected properties of novel polyurethanes for applications in medicine. Part II. Polyurethanes containing cycloaliphatic diisocyanates in the hard segment. Polimery. 2011; 56 ():27-34.
Chicago/Turabian StyleJoanna Brzeska; Piotr Dacko; Henryk Janeczek; Marek Kowalczuk; Helena Janik; Maria Rutkowska. 2011. "The influence of synthetic polyhydroxybutyrate on selected properties of novel polyurethanes for applications in medicine. Part II. Polyurethanes containing cycloaliphatic diisocyanates in the hard segment." Polimery 56, no. : 27-34.