基于壳聚糖物理网络的高强韧双网络水凝胶的构建、调控与应用

双网络水凝胶由两个具有相反物理性质的交联网络构成,硬而脆的第一网络在变形过程中断裂耗散能量,从而增韧凝胶.当第一网络为具有重建能力的物理网络时,双网络水凝胶表现出优异的抗软化和机械稳定性.目前双网络水凝胶第一物理网络类型单一、结构和力学调控繁琐,因而其开发和应用受到限制.针对上述问题,作者发展了硬而脆的壳聚糖物理网络构...

Chitosan-Based High-Mechanical Double-Network Hydrogels:Construction,Modulation and Applications

Double-network(DN)hydrogels are composed of two asymmetric networks with contrasting properties,wherein the rigid and brittle network serving as sacrificial bonds effectively dissipates energy to enhance the mechanical performance.The first reconstructable physical network endows the DN hydrogels with outstanding anti-soften and mechanical stability.However,the monotonous type of physical networks and the difficulty in tailoring structure and mechanics greatly limit the development and application of DN hydrogels.Focusing on these problems,we have fabricated the rigid and brittle chitosan physical network with adjustable network type,structure and property and further constructed various chitosan-based DN hydrogels with high mechanical performance and tunable mechanics.The hydrogels were potential materials for anti-freezing dresses,biomedical materials,flexible electronics and wearable devices.The universal strategy of constructing chitosan-based DN hydrogels was beneficial for developing various functional and high-mechanical hydrogels and broadening their applications.