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This work aims to synthesize biocompatible composite materials loaded with recycled porcine bone powder (BP) to fabricate scaffolds for in-situ reconstruction of bone structures. Polylactic acid (PLA) and poly(ε-caprolactone) (PCL) were tested as matrices in percentages from 40 wt% to 80 wt%. Chitosan (CS) was selected for its antibacterial properties, in the amount from 5 wt% to 15 wt%, and BP from 20 wt% to 50 wt% as active filler to promote osseointegration. In this preliminary investigation, samples have been produced by solvent casting to introduce the highest possible percentage of fillers. PCL has been chosen as a matrix due to its greater ability to incorporate fillers, ensuring their adequate dispersion and lower working temperatures compared to PLA. Tensile tests demonstrated strength properties (6–10 MPa) suitable for hard tissue engineering applications. Based on the different findings (integration of PLA in the composite system, improvements in CS adhesion and mechanical properties), the authors supposed an optimization of the synthesis process, focused on the possible implementation of the electrospinning technique to develop PCL-BP composites reinforced with PLA-CS microfibers. Finally, biological tests were conducted to evaluate the antibacterial activity of CS, demonstrating the applicability of the materials for the biomedical field.
Marco Valente; Jordi Puiggalí; Luis J. del Valle; Gioconda Titolo; Matteo Sambucci. Recycled Porcine Bone Powder as Filler in Thermoplastic Composite Materials Enriched with Chitosan for a Bone Scaffold Application. Polymers 2021, 13, 2751 .
AMA StyleMarco Valente, Jordi Puiggalí, Luis J. del Valle, Gioconda Titolo, Matteo Sambucci. Recycled Porcine Bone Powder as Filler in Thermoplastic Composite Materials Enriched with Chitosan for a Bone Scaffold Application. Polymers. 2021; 13 (16):2751.
Chicago/Turabian StyleMarco Valente; Jordi Puiggalí; Luis J. del Valle; Gioconda Titolo; Matteo Sambucci. 2021. "Recycled Porcine Bone Powder as Filler in Thermoplastic Composite Materials Enriched with Chitosan for a Bone Scaffold Application." Polymers 13, no. 16: 2751.
Electrospun scaffolds of the biodegradable and biocompatible poly-4-hydroxybutyrate (P4HB) polyester have been prepared using horizontal and vertical set-up configurations of electrospinning. Specifically, it has been evaluated the influence of solvent, polymer concentration, and processing parameters, such as applied voltage, flow rate, and needle tip-collector distance. Scaffolds obtained under the most favorable conditions were characterized in terms of crystallinity, lamellar supramolecular order, thermal (including calorimetric and thermogravimetric data), mechanical, and surface properties. Results pointed out significant differences with respect to commercial sutures (based in P4HB, e.g., MonoMax®) and demonstrated that electrospun scaffolds were constituted by crystalline microfibers with a tangled distribution that leads to high modulus Young modulus (4 MPa), maximum strength (28 MPa), and elongation (360%). Furthermore, new scaffolds had thermal stability and a rough surface that led to a hydrophobic character (105°). Scaffolds could also be successfully loaded during the electrospinning process with a peptide analog to the fibroblast growth factor (e.g., CYRSRKYSSWYVALKRC), giving rise to fully biocompatible samples with a clear acceleration in wound healing.
Ina Keridou; Lourdes Franco; Juan C. Martínez; Pau Turon; Luis J. Del Valle; Jordi Puiggalí. Electrospun scaffolds for wound healing applications from poly(4‐hydroxybutyrate): A biobased and biodegradable linear polymer with high elastomeric properties. Journal of Applied Polymer Science 2021, 51447 .
AMA StyleIna Keridou, Lourdes Franco, Juan C. Martínez, Pau Turon, Luis J. Del Valle, Jordi Puiggalí. Electrospun scaffolds for wound healing applications from poly(4‐hydroxybutyrate): A biobased and biodegradable linear polymer with high elastomeric properties. Journal of Applied Polymer Science. 2021; ():51447.
Chicago/Turabian StyleIna Keridou; Lourdes Franco; Juan C. Martínez; Pau Turon; Luis J. Del Valle; Jordi Puiggalí. 2021. "Electrospun scaffolds for wound healing applications from poly(4‐hydroxybutyrate): A biobased and biodegradable linear polymer with high elastomeric properties." Journal of Applied Polymer Science , no. : 51447.
Melt electrospinning of polylactide (PLA) loaded with chloramphenicol (CAM) has been performed and characteristics of fibers, physical properties of scaffolds, CAM release behavior, antibacterial properties and biocompatibility have been evaluated. The interest of CAM loaded samples is nowadays enhanced for biomedical applications since this antibiotic has been demonstrated to be efficient for the treatment of cancer. Melt electrospinning has been selected as an ideal preparation process because it avoids the use of toxic solvents which are harmful to the environment and could be problematic for biomedical applications. The electrospinning process rendered fibers with a relatively large diameter (between 20 μm and 40 μm depending on the load) and minimum polymer degradation. Characteristics of melt electrospun scaffolds were also compared with those prepared by solution electrospinning. Differences consisted in a more sustained release and a higher biocompatibility for the melt processed samples. Bactericide effect was evaluated as an evidence of the maintenance of the CAM bioactivity after melt processing at high temperature and the slower release caused by the relatively high diameter of the constitutive fibers. Since pure CAM showed thermal degradation at temperatures relatively close to the PLA melting temperature, a complete analysis of the degradation process of pure CAM as well as of PLA samples loaded with CAM was performed. The Invariant Kinetic Parameters method allowed determining an initial decomposition step that followed an autoaccelatory Avrami model, and then an autocatalytic decomposition reaction took place for conversions higher than 50%. Dispersion in the PLA matrix enhances the thermal stability of the antibiotic, with an onset temperature of degradation that was higher by 16 °C in the melt-electrospun fibers than in the liquid state of pure CAM.
Sofia Valenti; Luis del Valle; Omid Yousefzade; Roberto Macovez; Lourdes Franco; Jordi Puiggalí. Chloramphenicol loaded polylactide melt electrospun scaffolds for biomedical applications. International Journal of Pharmaceutics 2021, 606, 120897 .
AMA StyleSofia Valenti, Luis del Valle, Omid Yousefzade, Roberto Macovez, Lourdes Franco, Jordi Puiggalí. Chloramphenicol loaded polylactide melt electrospun scaffolds for biomedical applications. International Journal of Pharmaceutics. 2021; 606 ():120897.
Chicago/Turabian StyleSofia Valenti; Luis del Valle; Omid Yousefzade; Roberto Macovez; Lourdes Franco; Jordi Puiggalí. 2021. "Chloramphenicol loaded polylactide melt electrospun scaffolds for biomedical applications." International Journal of Pharmaceutics 606, no. : 120897.
Aliphatic polyamides (nylons) constitute a family of polymers with outstanding properties and multiple applications. Despite the intensive research studies carried out with nylons, there are still multiple unsolved questions concerning crystallization processes, crystalline structures, polymorphic transitions, and crystalline morphologies. Constrains imposed by the strong intermolecular interactions affect the amorphous state, the rigid amorphous phase, the molecular folding, the morphology and obviously the crystalline structure. Some of these relevant points are discussed in the present work.
Jordi Puiggalí. Aliphatic polyamides (nylons): Interplay between hydrogen bonds and crystalline structures, polymorphic transitions and crystallization. POLYMER CRYSTALLIZATION 2021, 4, e10199 .
AMA StyleJordi Puiggalí. Aliphatic polyamides (nylons): Interplay between hydrogen bonds and crystalline structures, polymorphic transitions and crystallization. POLYMER CRYSTALLIZATION. 2021; 4 (4):e10199.
Chicago/Turabian StyleJordi Puiggalí. 2021. "Aliphatic polyamides (nylons): Interplay between hydrogen bonds and crystalline structures, polymorphic transitions and crystallization." POLYMER CRYSTALLIZATION 4, no. 4: e10199.
The selective production of ethanol has been achieved by fixing carbon from CO2 and CH4. The reaction, which is based on the electro-reduction of CO2, is catalysed by polarized hydroxyapatite and occurs under mild reaction conditions.
Jordi Sans; Guillem Revilla-López; Vanesa Sanz; Jordi Puiggalí; Pau Turon; Carlos Alemán. Permanently polarized hydroxyapatite for selective electrothermal catalytic conversion of carbon dioxide into ethanol. Chemical Communications 2021, 57, 5163 -5166.
AMA StyleJordi Sans, Guillem Revilla-López, Vanesa Sanz, Jordi Puiggalí, Pau Turon, Carlos Alemán. Permanently polarized hydroxyapatite for selective electrothermal catalytic conversion of carbon dioxide into ethanol. Chemical Communications. 2021; 57 (42):5163-5166.
Chicago/Turabian StyleJordi Sans; Guillem Revilla-López; Vanesa Sanz; Jordi Puiggalí; Pau Turon; Carlos Alemán. 2021. "Permanently polarized hydroxyapatite for selective electrothermal catalytic conversion of carbon dioxide into ethanol." Chemical Communications 57, no. 42: 5163-5166.
The enhanced catalytic activity of permanently polarized hydroxyapatite, which is achieved using a thermally stimulated polarization process, largely depends on both the experimental conditions used to prepare crystalline hydroxyapatite from its calcium and phosphate precursors and the polarization process parameters. A mineral to brushite, which is an apatitic phase that can evolve to hydroxyapatite, is found at the surface of highly crystalline hydroxyapatite. It appears after chemical precipitation and hydrothermal treatment performed at 150 °C for 24 h followed by a sinterization at 1000 °C and a polarization treatment by applying a voltage of 500 V at high temperature. Both the high crystallinity and the presence of brushite-like phase on the electrophotocatalyst affect the nitrogen and carbon fixation under mild reaction conditions (95 °C and 6 bar) and the synthesis of glycine and alanine from a simple gas mixture containing N2, CO2, CH4 and H2O. Thus, the Gly/Ala ratio can be customized by controlling the presence of brushite on the surface of the catalyst, enabling to develop new strategies to regulate the production of amino acids by nitrogen and carbon fixation.
Jordi Sans; Vanesa Sanz; Luis J. del Valle; Jordi Puiggalí; Pau Turon; Carlos Alemán. Optimization of permanently polarized hydroxyapatite catalyst. Implications for the electrophotosynthesis of amino acids by nitrogen and carbon fixation. Journal of Catalysis 2021, 397, 98 -107.
AMA StyleJordi Sans, Vanesa Sanz, Luis J. del Valle, Jordi Puiggalí, Pau Turon, Carlos Alemán. Optimization of permanently polarized hydroxyapatite catalyst. Implications for the electrophotosynthesis of amino acids by nitrogen and carbon fixation. Journal of Catalysis. 2021; 397 ():98-107.
Chicago/Turabian StyleJordi Sans; Vanesa Sanz; Luis J. del Valle; Jordi Puiggalí; Pau Turon; Carlos Alemán. 2021. "Optimization of permanently polarized hydroxyapatite catalyst. Implications for the electrophotosynthesis of amino acids by nitrogen and carbon fixation." Journal of Catalysis 397, no. : 98-107.
Porous biodegradable scaffolds provide a physical substrate for cells allowing them to attach, proliferate and guide the formation of new tissues. A variety of techniques have been developed to fabricate tissue engineering (TE) scaffolds, among them the most relevant is the thermally-induced phase separation (TIPS). This technique has been widely used in recent years to fabricate three-dimensional (3D) TE scaffolds. Low production cost, simple experimental procedure and easy processability together with the capability to produce highly porous scaffolds with controllable architecture justify the popularity of TIPS. This paper provides a general overview of the TIPS methodology applied for the preparation of 3D porous TE scaffolds. The recent advances in the fabrication of porous scaffolds through this technique, in terms of technology and material selection, have been reviewed. In addition, how properties can be effectively modified to serve as ideal substrates for specific target cells has been specifically addressed. Additionally, examples are offered with respect to changes of TIPS procedure parameters, the combination of TIPS with other techniques and innovations in polymer or filler selection.
Reza Zeinali; Luis del Valle; Joan Torras; Jordi Puiggalí. Recent Progress on Biodegradable Tissue Engineering Scaffolds Prepared by Thermally-Induced Phase Separation (TIPS). International Journal of Molecular Sciences 2021, 22, 3504 .
AMA StyleReza Zeinali, Luis del Valle, Joan Torras, Jordi Puiggalí. Recent Progress on Biodegradable Tissue Engineering Scaffolds Prepared by Thermally-Induced Phase Separation (TIPS). International Journal of Molecular Sciences. 2021; 22 (7):3504.
Chicago/Turabian StyleReza Zeinali; Luis del Valle; Joan Torras; Jordi Puiggalí. 2021. "Recent Progress on Biodegradable Tissue Engineering Scaffolds Prepared by Thermally-Induced Phase Separation (TIPS)." International Journal of Molecular Sciences 22, no. 7: 3504.
Melt electrospinning has been developed in the last decade as an eco-friendly and solvent-free process to fill the gap between the advantages of solution electrospinning and the need of a cost-effective technique for industrial applications. Although the benefits of using melt electrospinning compared to solution electrospinning are impressive, there are still challenges that should be solved. These mainly concern to the improvement of polymer melt processability with reduction of polymer degradation and enhancement of fiber stability; and the achievement of a good control over the fiber size and especially for the production of large scale ultrafine fibers. This review is focused in the last research works discussing the different melt processing techniques, the most significant melt processing parameters, the incorporation of different additives (e.g., viscosity and conductivity modifiers), the development of polymer blends and nanocomposites, the new potential applications and the use of drug-loaded melt electrospun scaffolds for biomedical applications.
Anna Bachs-Herrera; Omid Yousefzade; Luis del Valle; Jordi Puiggali. Melt Electrospinning of Polymers: Blends, Nanocomposites, Additives and Applications. Applied Sciences 2021, 11, 1808 .
AMA StyleAnna Bachs-Herrera, Omid Yousefzade, Luis del Valle, Jordi Puiggali. Melt Electrospinning of Polymers: Blends, Nanocomposites, Additives and Applications. Applied Sciences. 2021; 11 (4):1808.
Chicago/Turabian StyleAnna Bachs-Herrera; Omid Yousefzade; Luis del Valle; Jordi Puiggali. 2021. "Melt Electrospinning of Polymers: Blends, Nanocomposites, Additives and Applications." Applied Sciences 11, no. 4: 1808.
The self-assembly behavior of chemoenzymatic high molecular weight (ca. 30 000 Da) poly-l-phenylalanine (ePLP) and the nano-morphologies thereof are investigated.
Alejandra Romero-Montero; Isabel S. Aguirre-Díaz; Jordi Puiggalí; Luis J. del Valle; Miquel Gimeno. Self-assembly of supramolecular chemoenzymatic poly-l-phenylalanine. Polymer Chemistry 2021, 12, 1199 -1209.
AMA StyleAlejandra Romero-Montero, Isabel S. Aguirre-Díaz, Jordi Puiggalí, Luis J. del Valle, Miquel Gimeno. Self-assembly of supramolecular chemoenzymatic poly-l-phenylalanine. Polymer Chemistry. 2021; 12 (9):1199-1209.
Chicago/Turabian StyleAlejandra Romero-Montero; Isabel S. Aguirre-Díaz; Jordi Puiggalí; Luis J. del Valle; Miquel Gimeno. 2021. "Self-assembly of supramolecular chemoenzymatic poly-l-phenylalanine." Polymer Chemistry 12, no. 9: 1199-1209.
Hydrolytic degradation of poly(4-hydroxybutyrate) (P4HB) films has been studied considering media of different pH values (i.e., 3, 7 and 10) and temperatures (i.e., 37 and 55 °C). Enzymatic degradation has also been evaluated at physiological conditions using two different lipases: Pseudomonas cepacia and Rhizopus oryzae. Different bulk and surface erosion mechanisms with random chain scissions and successive removal of monomer units have been supported through weight loss measurements, molecular weight determinations by GPC and NMR spectroscopy and changes on thermal properties by DSC. Thermal annealing during exposure to different media and even degradation influenced on the melting temperature and crystallinity of samples, as well as on the lamellar geometrical parameters as evaluated by SAXS. Enzymatic degradation was ideal to selectively eliminate the amorphous regions and highlight the spherulitic morphology. Presence of ringed textures were therefore evident in bright field optical micrographs in addition to SEM images, namely observations under polarized light was not necessary to distinguish the presence of banded spherulites. Rhizopus oryzae was revealed to be the most suitable enzyme to crop out the P4HB spherulites that form part of the initial smooth surfaces of solvent casting films. After determining the appropriate activity and exposure time, the presence of rings constituted by cooperative C-shaped edge-on lamellae and flat-on lamellae was highlighted.
Ina Keridou; Lourdes Franco; Luis J. del Valle; Juan C. Martínez; Lutz Funk; Pau Turon; Jordi Puiggalí. Hydrolytic and enzymatic degradation of biobased poly(4-hydroxybutyrate) films. Selective etching of spherulites. Polymer Degradation and Stability 2020, 183, 109451 .
AMA StyleIna Keridou, Lourdes Franco, Luis J. del Valle, Juan C. Martínez, Lutz Funk, Pau Turon, Jordi Puiggalí. Hydrolytic and enzymatic degradation of biobased poly(4-hydroxybutyrate) films. Selective etching of spherulites. Polymer Degradation and Stability. 2020; 183 ():109451.
Chicago/Turabian StyleIna Keridou; Lourdes Franco; Luis J. del Valle; Juan C. Martínez; Lutz Funk; Pau Turon; Jordi Puiggalí. 2020. "Hydrolytic and enzymatic degradation of biobased poly(4-hydroxybutyrate) films. Selective etching of spherulites." Polymer Degradation and Stability 183, no. : 109451.
Thermally induced phase separation followed by freeze drying has been used to prepare biodegradable and biocompatible scaffolds with interconnected 3D microporous structures from poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV) copolymers containing 5 and 12 wt % of 3-hydroxyvalerate (HV). Solutions of PHBV in 1,4-dioxane, underwent phase separation by cooling under two different thermal gradients (at −25 °C and −5 °C). The cloud point and crystallization temperature of the polymer solutions were determined by turbidimetry and differential scanning calorimetry, respectively. Parameters affecting the phase separation mechanism such as variation of both the cooling process and the composition of the PHBV copolymer were investigated. Afterwards, the influence of these variables on the morphology of the porous structure and the final mechanical properties (i.e., rigidity and damping) was evaluated via scanning electron microscopy and dynamic mechanical thermal analysis, respectively. While the morphology of the scaffolds was considerably affected by polymer crystallization upon a slow cooling rate, the effect of solvent crystallization was more evident at either high hydroxyvalerate content (i.e., 12 wt % of HV) or high cooling rate. The decrease in the HV content gave rise to scaffolds with greater stiffness because of their higher degree of crystallinity, being also noticeable the greater consistency of the structure attained when the cooling rate was higher. Scaffolds were fully biocompatible supports for cell adhesion and proliferation in 3D cultures and show potential application as a tool for tissue regeneration.
Reza Zeinali; Mohammad Taghi Khorasani; Aliasghar Behnamghader; Mohammad Atai; Luis Del Valle; Jordi Puiggalí. Poly(hydroxybutyrate-co-hydroxyvalerate) Porous Matrices from Thermally Induced Phase Separation. Polymers 2020, 12, 2787 .
AMA StyleReza Zeinali, Mohammad Taghi Khorasani, Aliasghar Behnamghader, Mohammad Atai, Luis Del Valle, Jordi Puiggalí. Poly(hydroxybutyrate-co-hydroxyvalerate) Porous Matrices from Thermally Induced Phase Separation. Polymers. 2020; 12 (12):2787.
Chicago/Turabian StyleReza Zeinali; Mohammad Taghi Khorasani; Aliasghar Behnamghader; Mohammad Atai; Luis Del Valle; Jordi Puiggalí. 2020. "Poly(hydroxybutyrate-co-hydroxyvalerate) Porous Matrices from Thermally Induced Phase Separation." Polymers 12, no. 12: 2787.
Tissue engineering approaches appear nowadays highly promising for the regeneration of injured/diseased tissues. Biomimetic scaffolds are continuously been developed to act as structural support for cell growth and proliferation as well as for the delivery of cells able to be differentiated, and also of bioactive molecules like growth factors and even signaling cues. The current research concerns materials employed to develop biological scaffolds with improved features as well as complex preparation techniques. In this work, hybrid systems based on natural polymers are discussed and the efforts focused to provide new polymers able to mimic proteins and DNA are extensively explained. Progress on the scaffold fabrication technique is mentioned, those processes based on solution and melt electrospinning or even on their combination being mainly discussed. Selection of the appropriate hybrid technology becomes vital to get optimal architecture to reasonably accomplish the final applications. Representative examples of the recent possibilities on tissue regeneration are finally given.
Omid Yousefzade; Ramaz Katsarava; Jordi Puiggalí. Biomimetic Hybrid Systems for Tissue Engineering. Biomimetics 2020, 5, 49 .
AMA StyleOmid Yousefzade, Ramaz Katsarava, Jordi Puiggalí. Biomimetic Hybrid Systems for Tissue Engineering. Biomimetics. 2020; 5 (4):49.
Chicago/Turabian StyleOmid Yousefzade; Ramaz Katsarava; Jordi Puiggalí. 2020. "Biomimetic Hybrid Systems for Tissue Engineering." Biomimetics 5, no. 4: 49.
Vitor Bonamigo Moreira; Arjan W. Kleij; Lourdes Franco; Jordi Puiggalí; Alvaro Meneguzzi; Carlos Alemán; Elaine Armelin. Use of poly(limonene-8,9-oxide carbonate) as a bio-based prepolymer for epoxy thermoset production. 14th Mediterranean Congress of Chemical Engineering (MeCCE14) Abstracts Publication 2020, 1 .
AMA StyleVitor Bonamigo Moreira, Arjan W. Kleij, Lourdes Franco, Jordi Puiggalí, Alvaro Meneguzzi, Carlos Alemán, Elaine Armelin. Use of poly(limonene-8,9-oxide carbonate) as a bio-based prepolymer for epoxy thermoset production. 14th Mediterranean Congress of Chemical Engineering (MeCCE14) Abstracts Publication. 2020; ():1.
Chicago/Turabian StyleVitor Bonamigo Moreira; Arjan W. Kleij; Lourdes Franco; Jordi Puiggalí; Alvaro Meneguzzi; Carlos Alemán; Elaine Armelin. 2020. "Use of poly(limonene-8,9-oxide carbonate) as a bio-based prepolymer for epoxy thermoset production." 14th Mediterranean Congress of Chemical Engineering (MeCCE14) Abstracts Publication , no. : 1.
Fibers of poly(4-hydroxybutyrate) (P4HB) have been submitted to both hydrolytic and enzymatic degradation media in order to generate samples with different types and degrees of chain breakage. Random chain hydrolysis is clearly enhanced by varying temperatures from 37 to 55 °C and is slightly dependent on the pH of the medium. Enzymatic attack is a surface erosion process with significant solubilization as a consequence of a preferent stepwise degradation. Small angle X-ray diffraction studies revealed a peculiar supramolecular structure with two different types of lamellar stacks. These were caused by the distinct shear stresses that the core and the shell of the fiber suffered during the severe annealing process. External lamellae were characterized by surfaces tilted 45° with respect to the stretching direction and a higher thickness, while the inner lamellae were more imperfect and had their surfaces perpendicularly oriented to the fiber axis. In all cases, WAXD data indicated that the chain molecular axis was aligned with the fiber axis and molecules were arranged according to a single orthorhombic structure. A gradual change of the microstructure was observed as a function of the progress of hydrolysis while changes were not evident under an enzymatic attack. Hydrolysis mainly affected the inner lamellar stacks as revealed by the direct SAXS patterns and the analysis of correlation functions. Both lamellar crystalline and amorphous thicknesses slightly increased as well as the electronic contrast between amorphous and crystalline regions. Thermal treatments of samples exposed to the hydrolytic media revealed microstructural changes caused by degradation, with the inner lamellae being those that melted faster.
Ina Keridou; Lourdes Franco; Luis J. Del Valle; Juan C. Martínez; Lutz Funk; Pau Turon; Jordi Puiggalí. Microstructural Changes during Degradation of Biobased Poly(4-Hydroxybutyrate) Sutures. Polymers 2020, 12, 2024 .
AMA StyleIna Keridou, Lourdes Franco, Luis J. Del Valle, Juan C. Martínez, Lutz Funk, Pau Turon, Jordi Puiggalí. Microstructural Changes during Degradation of Biobased Poly(4-Hydroxybutyrate) Sutures. Polymers. 2020; 12 (9):2024.
Chicago/Turabian StyleIna Keridou; Lourdes Franco; Luis J. Del Valle; Juan C. Martínez; Lutz Funk; Pau Turon; Jordi Puiggalí. 2020. "Microstructural Changes during Degradation of Biobased Poly(4-Hydroxybutyrate) Sutures." Polymers 12, no. 9: 2024.
Microcantilever-based technology has been used to study the influence of nanofeatures (i.e. nanopores, nanoperforations and segregated drug nanodomains) on the glass transition temperature and the cold crystallization temperature of PLA thin films.
Maximilien Lopes-Rodrigues; Didac Martí-Balleste; Catherine Michaux; Eric A. Perpète; Jordi Puiggalí; Maria M. Pérez-Madrigal; Carlos Alemán. Nanofeatures affect the thermal transitions of polymer thin films: a microcantilever-based investigation. Materials Advances 2020, 1, 2084 -2094.
AMA StyleMaximilien Lopes-Rodrigues, Didac Martí-Balleste, Catherine Michaux, Eric A. Perpète, Jordi Puiggalí, Maria M. Pérez-Madrigal, Carlos Alemán. Nanofeatures affect the thermal transitions of polymer thin films: a microcantilever-based investigation. Materials Advances. 2020; 1 (6):2084-2094.
Chicago/Turabian StyleMaximilien Lopes-Rodrigues; Didac Martí-Balleste; Catherine Michaux; Eric A. Perpète; Jordi Puiggalí; Maria M. Pérez-Madrigal; Carlos Alemán. 2020. "Nanofeatures affect the thermal transitions of polymer thin films: a microcantilever-based investigation." Materials Advances 1, no. 6: 2084-2094.
The schematic representation of the hydrogel/nanofiber shows the gaps among electrospun-fibers filled with flowing precursor solution of the hydrogel.
Alejandra Romero-Montero; Pablo Labra-Vázquez; Luis J. del Valle; Jordi Puiggalí; Roeb García-Arrazola; Carmina Montiel; Miquel Gimeno. Development of an antimicrobial and antioxidant hydrogel/nano-electrospun wound dressing. RSC Advances 2020, 10, 30508 -30518.
AMA StyleAlejandra Romero-Montero, Pablo Labra-Vázquez, Luis J. del Valle, Jordi Puiggalí, Roeb García-Arrazola, Carmina Montiel, Miquel Gimeno. Development of an antimicrobial and antioxidant hydrogel/nano-electrospun wound dressing. RSC Advances. 2020; 10 (51):30508-30518.
Chicago/Turabian StyleAlejandra Romero-Montero; Pablo Labra-Vázquez; Luis J. del Valle; Jordi Puiggalí; Roeb García-Arrazola; Carmina Montiel; Miquel Gimeno. 2020. "Development of an antimicrobial and antioxidant hydrogel/nano-electrospun wound dressing." RSC Advances 10, no. 51: 30508-30518.
An electroresponsive hybrid platform for tissue engineering, based on isotactic polypropylene, poly 3,4-ethylenedioxythiophene and poly(ε-caprolactone) has been developed.
Brenda G. Molina; Anca-Dana Bendrea; Sonia Lanzalaco; Lourdes Franco; Luminita Cianga; Luis J. del Valle; Jordi Puiggali; Pau Turon; Elaine Armelin; Ioan Cianga; Carlos Aleman. Smart design for a flexible, functionalized and electroresponsive hybrid platform based on poly(3,4-ethylenedioxythiophene) derivatives to improve cell viability. Journal of Materials Chemistry B 2020, 8, 8864 -8877.
AMA StyleBrenda G. Molina, Anca-Dana Bendrea, Sonia Lanzalaco, Lourdes Franco, Luminita Cianga, Luis J. del Valle, Jordi Puiggali, Pau Turon, Elaine Armelin, Ioan Cianga, Carlos Aleman. Smart design for a flexible, functionalized and electroresponsive hybrid platform based on poly(3,4-ethylenedioxythiophene) derivatives to improve cell viability. Journal of Materials Chemistry B. 2020; 8 (38):8864-8877.
Chicago/Turabian StyleBrenda G. Molina; Anca-Dana Bendrea; Sonia Lanzalaco; Lourdes Franco; Luminita Cianga; Luis J. del Valle; Jordi Puiggali; Pau Turon; Elaine Armelin; Ioan Cianga; Carlos Aleman. 2020. "Smart design for a flexible, functionalized and electroresponsive hybrid platform based on poly(3,4-ethylenedioxythiophene) derivatives to improve cell viability." Journal of Materials Chemistry B 8, no. 38: 8864-8877.
High-performance hydrogels play a crucial role as solid electrolytes for flexible electrochemical supercapacitors.
Guillem Ruano; Jordi Tononi; David Curcó; Jordi Puiggalí; Juan Torras; Carlos Alemán. Doped photo-crosslinked polyesteramide hydrogels as solid electrolytes for supercapacitors. Soft Matter 2020, 16, 1 .
AMA StyleGuillem Ruano, Jordi Tononi, David Curcó, Jordi Puiggalí, Juan Torras, Carlos Alemán. Doped photo-crosslinked polyesteramide hydrogels as solid electrolytes for supercapacitors. Soft Matter. 2020; 16 (34):1.
Chicago/Turabian StyleGuillem Ruano; Jordi Tononi; David Curcó; Jordi Puiggalí; Juan Torras; Carlos Alemán. 2020. "Doped photo-crosslinked polyesteramide hydrogels as solid electrolytes for supercapacitors." Soft Matter 16, no. 34: 1.
The electrophotocatalytic synthesis of Glycine and Alanine from a simple gas mixture containing N2, CO2, CH4 and H2O under mild reaction conditions (95 °C and 6 bar) was recently developed using a catalyst formed by permanently polarized hydroxyapatite, which is achieved using a thermally stimulated polarization process, coated with two layers of aminotris(methylenephosphonic acid) (ATMP) separated by an intermediate layer of zirconyl chloride (ZC). This work reports the optimization of the ATMP- and ZC-coating content by examining the influence of their concentration of each component in each layer on the structural and electrochemical properties of the catalyst. After exhaustive analyses, such properties have been related with the efficiency of the catalysts prepared using different ATMP- and ZC-concentrations to yield Gly and Ala amino acids by fixing nitrogen from N2 and carbon from CO2 and CH4. Results show that, although the concentrations of ATMP and ZC in the first and the intermediate layers are important, the third layer plays a predominant role as is responsible of the apparition of supramolecular structures on the surface and the capacitive behavior of the coating.
Jordi Sans; Elaine Armelin; Vanesa Sanz; Jordi Puiggalí; Pau Turon; Carlos Alemán. Breaking-down the catalyst used for the electrophotosynthesis of amino acids by nitrogen and carbon fixation. Journal of Catalysis 2020, 389, 646 -656.
AMA StyleJordi Sans, Elaine Armelin, Vanesa Sanz, Jordi Puiggalí, Pau Turon, Carlos Alemán. Breaking-down the catalyst used for the electrophotosynthesis of amino acids by nitrogen and carbon fixation. Journal of Catalysis. 2020; 389 ():646-656.
Chicago/Turabian StyleJordi Sans; Elaine Armelin; Vanesa Sanz; Jordi Puiggalí; Pau Turon; Carlos Alemán. 2020. "Breaking-down the catalyst used for the electrophotosynthesis of amino acids by nitrogen and carbon fixation." Journal of Catalysis 389, no. : 646-656.
Blends with different ratios of polylactide and polyamide 6,10 (PA610) have been prepared by melt-mixing using a Brabender mixer equipment. Previously, a rheologically modified polylactide (PLAREx) was obtained through reactive extrusion using a multifunctional epoxide agent. It was expected that unreacted epoxy groups of PLAREx were able to improve the compatibility between the two polymers. SEM observations revealed a logical dependence of the morphology of immiscible phases with composition, and more interestingly a co-continuity at relatively low PA content (around 50%) was detected. This result contrasts with previous observations performed with non-modified PLA. Confined PA domains increased with the PA content and hardly crystallized at the typical crystallization temperature of the pure PA (195 °C). Synchrotron X-ray diffraction studies indicated that a PA crystallization at a lower temperature close to 120 °C was enhanced and led to a pseudohexagonal γ phase that differs from the characteristic layered structure of PA610. SAXS data revealed also that well differentiated lamellar entities could be assigned at both immiscible polymer phases. Clear differences were observed in the spherulitic morphologies attained under isothermal melt crystallization experiments. Results indicated that the texture of PLAREx spherulites was modified by the presence of PA. Compatibilization of PA molecules on the crystal lamellar boundaries of PLAREx led to an enhancement of the lamellar twisting frequency. Optical microscopy results also indicated that the crystal growth rate of PLAREx increased by the incorporation of PA, but in contrast this had an adverse effect on the nucleation process.
Ina Keridou; Jonathan Cailloux; Juan C. Martínez; Orlando Santana; Maria Lluisa Maspoch; Jordi Puiggalí; Lourdes Franco. Biphasic polylactide/polyamide 6,10 blends: Influence of composition on polyamide structure and polyester crystallization. Polymer 2020, 202, 122676 .
AMA StyleIna Keridou, Jonathan Cailloux, Juan C. Martínez, Orlando Santana, Maria Lluisa Maspoch, Jordi Puiggalí, Lourdes Franco. Biphasic polylactide/polyamide 6,10 blends: Influence of composition on polyamide structure and polyester crystallization. Polymer. 2020; 202 ():122676.
Chicago/Turabian StyleIna Keridou; Jonathan Cailloux; Juan C. Martínez; Orlando Santana; Maria Lluisa Maspoch; Jordi Puiggalí; Lourdes Franco. 2020. "Biphasic polylactide/polyamide 6,10 blends: Influence of composition on polyamide structure and polyester crystallization." Polymer 202, no. : 122676.