Hydrogel Films with Impact Resistance by Sacrificial Micelle-Assisted-Alignment.

ABSTRACT: Various strategies are developed to engineer aligned hierarchical architectures in polymer hydrogels for enhanced mechanical performance. However, chain alignment remains impeded by the presence of hydrogen bonds between adjacent chains. Herein, a facile sacrificial micelle-assisted-alignment strategy is proposed, leading to well-aligned, strong and tough pure chitosan hydrogels. The sacrificial sodium dodecyl sulfate micelles electrostatically interact with the protonated chitosan chains, enabling chain sliding and alignment under uniaxial forces. Subsequently, sacrificial micelles can be easily removed via NaOH treatment, causing the reforming of H-bond in the chain networks. The strength of the pure chitosan hydrogels increases 140-fold, reaching 58.9 ± 3.4 MPa; the modulus increases 59

SUBMITTER: Zhang J 

PROVIDER: S-EPMC11600213 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature