Energy-Dissipative and Soften Resistant Hydrogels Based on Chitosan Physical Network: From Construction to Application

Comprehensive Summary In spite of biological tissue-like peculiarity, multifarious functionalities and great application prospect, the low mechanics and soften behavior of hydrogels still retain a problem to be addressed for repetitive weight-bearing fields of flexible electronics, actuators, substitutions of soft tissues, wound dressing, wearable or implantable devices. Due to the distinct combination of diversity, reversibility and impressive disruption-reconstruction capacity, the chitosan physical cross-links can server as recoverable "sacrificial bonds" to construct multifarious energy-dissipative and anti-soften hydrogels and further broaden their diversified applications. In this review, we summarized the gelation mechanisms of chitosan physical networks and highlighted the chitosan physical network based hydrogels in rational design, construction principle, and structure and performance regulation. The recent progress in functional hydrogels for flexible electronics and biomaterials was systematically discussed. Overall, the review will provide comprehensive guidelines on the design principle, performance modulation and functionality construction of energy-dissipative and soften resistant hydrogels.