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Poly(3-hydroxybutyrate) Modified with Thermoplastic Polyurethane and Microfibrillated Cellulose: Hydrolytic Degradation and Thermal and Mechanical Properties.
Polymers (Basel)
December 2024
Faculty of Biology, University of Bucharest, 91-95 Splaiul Independentei, 050095 Bucharest, Romania.
Blending poly(3-hydroxybutyrate) (PHB) with other polymers could be a rapid and accessible solution to overcome some of its drawbacks. In this work, PHB was modified with microfibrillated cellulose (MC) and a thermoplastic polyurethane containing biodegradable segments (PU) by two routes, using a masterbatch and by direct mixing. The PU and MC modifiers improved the thermal stability of PHB by up to 13 °C and slightly decreased its melt viscosity and crystallinity, thus improving the melt processability.
View Article and Find Full Text PDFSynthesis and Characterization of Photocurable Difunctional Monomers for Medical Applications.
Polymers (Basel)
December 2024
Department of Polymer and Biomaterials Science, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Al. Piastów 45, 70-311 Szczecin, Poland.
Photocurable materials offer a rapid transition from a liquid to a solid state, and have recently received great interest in the medical field. However, while dental resins are very popular, only a few materials have been developed for soft tissue repair. This study aims to synthesize a difunctional methacrylate monomer using a dibutyltin dilaurate which is suitable for the photocuring of soft materials.
View Article and Find Full Text PDFRNAi of the elastomeric protein resilin reduces jump velocity and resilience to damage in locusts.
Proc Natl Acad Sci U S A
January 2025
Department of Zoology, University of Cambridge, Cambridge CB2 3EJ, United Kingdom.
Resilin, an elastomeric protein with remarkable physical properties that outperforms synthetic rubbers, is a near-ubiquitous feature of the power amplification mechanisms used by jumping insects. Catapult-like mechanisms, which incorporate elastic energy stores formed from a composite of stiff cuticle and resilin, are frequently used by insects to translate slow muscle contractions into rapid-release recoil movements. The precise role of resilin in these jumping mechanisms remains unclear, however.
View Article and Find Full Text PDFMethacrylated poly(glycerol sebacate) as a photocurable, biocompatible, and biodegradable polymer with tunable degradation and drug release kinetics.
Drug Deliv Transl Res
December 2024
Department of Bioengineering, Rice University, 6500 Main Street, Houston, TX, 77030, USA.
Poly(glycerol sebacate) (PGS) is a biodegradable, elastomeric polymer that has been explored for applications including tissue engineering, drug delivery, and wound repair. Despite its promise, its biomedical utility is limited by its rapid, and largely fixed, degradation rate. Additionally, its preparation requires prolonged curing at high temperatures, rendering it incompatible with heat-sensitive molecules, complex device geometries, and high-throughput production.
View Article and Find Full Text PDFCell driven elastomeric particle packing in composite bioinks for engineering and implantation of stable 3D printed structures.
Bioact Mater
February 2025
University of Toronto, Institute of Biomedical Engineering, Toronto, ON, Canada.
Geometric and structural integrity often deteriorate in 3D printed cell-laden constructs over time due to cellular compaction and hydrogel shrinkage. This study introduces a new approach that synergizes the advantages of cell compatibility of biological hydrogels and mechanical stability of elastomeric polymers for structure fidelity maintenance upon stereolithography and extrusion 3D printing. Enabling this advance is the composite bioink, formulated by integrating elastomeric microparticles from poly(octamethylene maleate (anhydride) citrate) (POMaC) into biologically derived hydrogels (fibrin, gelatin methacryloyl (GelMA), and alginate).
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