In this work, the gelatin/PAM double network (DN) hydrogels with super-compressibility was prepared by heating, initiator-induced polymerization and cooling, in which gelatin with triple helix structures was used as rigid part and PAM was used as flexible part. Swelling ratio, mechanical properties, and shape memory properties were studied. Studies have shown that gelatin/PAM DN hydrogels not only has excellent compression resistance, compression strength is 87.57 MPa, fracture strain is >90%, dissipation energy is 29.35 MJ/m³, but also great shape memory performance can restore shape within 20 s. A sudden increase in stress during gelatin/PAM DN hydrogels compression was observed. We hypothesized the spiral beam separation model to explain the mechanical properties of gelatin/PAM dual network hydrogels. This model can better explain why the DN hydrogel has excellent compression performance.

在这项工作中，通过加热，引发剂引发的聚合和冷却来制备具有超压缩性的明胶/ PAM双网络（DN）水凝胶，其中具有三螺旋结构的明胶被用作刚性部分，而PAM被用作柔性部分。研究了溶胀率，机械性能和形状记忆性能。研究表明，明胶/ PAM DN水凝胶不仅具有出色的抗压性，抗压强度为87.57 MPa，断裂应变> 90％，耗散能量为29.35 MJ / m ³，而且出色的形状记忆性能可以在20 s内恢复形状。观察到明胶/ PAM DN水凝胶压缩期间压力突然增加。我们假设螺旋束分离模型来解释明胶/ PAM双网络水凝胶的力学性能。该模型可以更好地解释DN水凝胶为何具有出色的压缩性能。