High ion barrier hydrogel with excellent toughness achieved by directional structures.

ABSTRACT: Owing to their nontoxicity, environmental friendliness, and high biocompatibility, physically cross-linked hydrogels have become popular research materials; however, their high water content and high free volume, along with the weak bonding interactions inherent to ordinary physically cross-linked hydrogels, limit their application in fields such as flexible devices, packaging materials, and substance transport regulation. Here, a structural barrier approach based on directional freezing-assisted salting out was proposed, and the directional structure significantly enhanced the barrier performance of the hydrogel. When the direction of substance diffusion was perpendicular to the pore channel structure of the directional freezing-PVA hydrogel (DFPVA), the Cl^- transmission rate w

SUBMITTER: Yang Z 

PROVIDER: S-EPMC11362914 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature