Ma Jiacheng, Wen Shifeng, Yue Zhufeng
School of Mechanics and Civil & Architecture, Northwestern Polytechnical University Xi'an 710129 PR China
RSC Adv. 2022 Aug 3;12(33):21512-21519. doi: 10.1039/d2ra03250c. eCollection 2022 Jul 21.
Although a wide range of self-healing materials have been reported by researchers, it is still a challenge to endow exceptional mechanical properties and shape memory characteristics simultaneously in a single material. Inspired by the structure of natural silk, herein, we have adopted a simple synthetic method to prepare a kind of elastomer (HM-PUs) with stiff, healable and shape memory capabilities assisted by multiple hydrogen bonds. The self-healing elastomer exhibits a maximum tensile strength of 39 MPa, toughness of 111.65 MJ m and self-healing efficiency of 96%. Moreover, the recuperative efficiency of shape memory could reach 100%. The fundamental study of HM-PUs will facilitate the development of flexible electronics and medical materials.
尽管研究人员已经报道了各种各样的自修复材料，但在单一材料中同时赋予优异的机械性能和形状记忆特性仍然是一项挑战。受天然蚕丝结构的启发，在此，我们采用一种简单的合成方法，制备了一种由多重氢键辅助的具有刚性、可自愈和形状记忆能力的弹性体（HM-PUs）。这种自修复弹性体的最大拉伸强度为39兆帕，韧性为111.65兆焦/立方米，自修复效率为96%。此外，形状记忆的恢复效率可达100%。对HM-PUs的基础研究将推动柔性电子学和医疗材料的发展。
