Chitosan derivative-based self-healable hydrogels with enhanced mechanical properties are reported, which were prepared by polymerization of acrylic acid (AAc) in 2-hydroxypropyltrimethyl ammonium chloride chitosan (HACC) solution. The PAAc/HACC hydrogels exhibit tensile fracture stress as high as 3.31 MPa and a Young's modulus of 2.53 MPa. They can maintain their original shape after 30 repeated compression cycles under various strain conditions, with a compression stress of more than 60 MPa at 99% strain. The damaged PAAc/HACC hydrogels can heal together in the presence of a NaCl salt solution with a self-healing efficiency of up to 61%. In addition, the PAAc/HACC hydrogels have high ionic conductivity and can serve as electrolytes for supercapacitors. The analysis suggests that all these good properties of the PAAc/HACC hydrogels mainly result from their high-density dynamic ionic interactions structure.

据报道，具有机械性能增强的基于壳聚糖衍生物的自修复水凝胶是通过丙烯酸（AAc）在2-羟丙基三甲基氯化铵壳聚糖（HACC）溶液中聚合制备的。PAAc / HACC水凝胶表现出高达3.31 MPa的拉伸断裂应力和2.53 MPa的杨氏模量。在各种应变条件下，经过30次重复压缩循环后，它们可以保持其原始形状，在99％应变下的压缩应力超过60 MPa。受损的PAAc / HACC水凝胶可以在NaCl盐溶液存在下一起自愈，自愈效率高达61％。此外，PAAc / HACC水凝胶具有高离子电导率，可以用作超级电容器的电解质。