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Release and Disintegration Properties of Poly(lactic Acid) Films with Allyl Isothiocyanate-β-Cyclodextrin Inclusion Complexes for Active Food Packaging.
Molecules
December 2024
Department of Analytical Chemistry, Nutrition & Food Sciences, University of Alicante, 03690 Alicante, Spain.
This study aimed to enhance the properties and compostability of active poly(lactic acid) (PLA) films by incorporating β-cyclodextrin (β-CD) inclusion complexes with allyl isothiocyanate (AITC). Films were prepared using melt extrusion and characterized based on their structural, chemical, morphological, thermal, and barrier properties. These inclusion complexes improved the thermal stability and moisture absorption of films, enhancing disintegration under composting conditions.
View Article and Find Full Text PDF[Preparation and Performance of a Novel Polyurethane Microporous Film on Polypropylene Medical Mesh Surface].
Sichuan Da Xue Xue Bao Yi Xue Ban
July 2024
（ 610065） College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, China.
Objective: This study aims to develop a medical patch surface material featuring a microporous polyurethane (PU) membrane and to assess the material's properties and biological performance. The goal is to enhance the clinical applicability of pelvic floor repair patch materials.
Methods: PU films with a microporous surface were prepared using PU prepolymer foaming technology.
Unique Method for Facile Postsynthetic Modification of Nonisocyanate Polyurethanes.
Macromolecules
March 2024
Luxembourg Institute of Science and Technology (LIST), 5, Avenue des Hauts-Fourneaux, L-4362 Esch-sur-Alzette, Luxembourg.
Nonisocyanate polyurethanes (NIPUs) are broadly investigated as a potential replacement for conventional polyurethanes (PUs) to eliminate the use of toxic isocyanates and reduce occupational hazards. One of the most popular approaches to NIPU synthesis is the polyaddition of cyclic bis(carbonate)s and diamines to form poly(hydroxyurethane)s (PHUs). However, such PHUs are highly hydrophilic due to the presence of two hydroxyl groups per repeat unit, and the resulting moisture absorption significantly degrades their thermomechanical performance and physical stability upon exposure to humidity, thus limiting their utility.
View Article and Find Full Text PDFControlling the Synthesis of Polyurea Microcapsules and the Encapsulation of Active Diisocyanate Compounds.
Polymers (Basel)
January 2024
Department of Chemistry, University of Patras, GR-26504 Patras, Greece.
The encapsulation of active components is currently used as common methodology for the insertion of additional functions like self-healing properties on a polymeric matrix. Among the different approaches, polyurea microcapsules are used in different applications. The design of polyurea microcapsules (MCs) containing active diisocyanate compounds, namely isophorone diisocyanate (IPDI) or hexamethylene diisocyanate (HDI), is explored in the present work.
View Article and Find Full Text PDFExamining the Water-Polymer Interactions in Non-Isocyanate Polyurethane/Polyhedral Oligomeric Silsesquioxane Hybrid Hydrogels.
Polymers (Basel)
December 2023
Department of Chemistry and Technology of Polymers, Cracow University of Technology, ul. Warszawska 24, 31-155 Kraków, Poland.
Article Synopsis
- The study examines how non-isocyanate polyurethane (NIPU) networks, modified with octa(3-hydroxy-3-methylbutyldimethylsiloxy)POSS, interact with water in varying humidity levels.
- The results indicate that adding up to 10 wt% of 8OHPOSS does not impede the NIPU's water affinity, likely due to its even dispersion within the polymer matrix.
- Furthermore, water absorption causes a reduction in the glass transition temperature (Tg) of the materials, attributed to the formation of stronger water-polymer hydrogen bonds, which disrupt existing polymer-polymer interactions.
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