Ambient Humidity-Dependent Tensile Behavior and Shape Memory Properties of Cinnamoyl Photo-Cross-Linked Poly(2-ethyl-2-oxazoline) Nanofibers

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Апрель 8, 2025

Electrospun, water-stable nanofiber membranes made from hydrophilic, biocompatible poly(2-ethyl-2-oxazoline) (PEtOx) networks hold significant promise in biomedical applications, particularly wound management. However, their mechanical behavior under varying environmental conditions remains poorly understood. This work provides an in-depth analysis of the tensile properties photo-cross-linked cinnamoyl-modified high-molar-mass PEtOx (PEtOx-Cin) with ambient humidity, assessing practical handling prior to application as dressings, while exploring shape memory basis for potential humidity-actuated closure. Cinnamoyl modification and cross-linking PEtOx-Cin mats significantly improve moisture stability, accelerate sorption, raise glass transition temperature (Tg) through newly formed covalent intermolecular bonds. At higher relative humidity (%RH) 25 65%RH, sorption induces plasticization, shifting Tg below room transforming brittle highly ductile elastomeric. glass-to-rubber enables humidity-stimulated behavior, revealing excellent temporary fixity at low rapid recovery original upon exposure high humidity. The presented findings advance understanding cross-linked membranes, further optimization is needed enhance stability improved handling, they underscore unique next-generation closure dressings.

Язык: Английский

Synthesis of photo-responsive κ-carrageenan-based hydrogels for drug delivery application

International Journal of Biological Macromolecules, Год журнала: 2024, Номер unknown, С. 138797 - 138797

Опубликована: Дек. 1, 2024

Язык: Английский