Molecular movements of trehalose inside a single network enabling a rapidly-recoverable tough hydrogel

IF 4.5 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

International Journal of Smart and Nano Materials Pub Date : 2022-08-30 DOI:10.1080/19475411.2022.2116735

Xiaowen Huang, Jimin Fu, Huiyan Tan, Yan Miu, Mengda Xu, Qiuhua Zhao, Yujie Xie, Shengtong Sun, H. Yao, Lidong Zhang

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引用次数: 1

Abstract

ABSTRACT It remains a challenge to achieve rapidly recoverable hydrogels by molecular hydrogen-bonding interaction because of its slow interaction kinetics. This work for the first time reports a trehalose (Tre)-based molecular movement mechanism inside a single network of polyacrylamide (PAM) that accelerates the kinetics of hydrogen-bonding interaction, and thereby endows the hydrogel with high toughness and rapid shape and mechanical recoverability. The resultant PAM@Tre hydrogel is capable of full shape recovery after 10,000 loading/unloading cycles at a strain of 500%. Even after being stretched at a strain of 2500%, it can recover to its original shape within 10 seconds. Moreover, the molecular movement of trehalose also endows the PAM@Tre hydrogel with fracture energy and toughness as high as ~9000 J m–2 and ~1600 kJ m–3, respectively, leading to strong resistance to both static and dynamic piercing. The PAM@Tre hydrogel is thus believed to have enormous potentials in protection devices, bionic skin, soft actuator, and stretchable electronics. Graphical abstract

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海藻糖在单个网络内的分子运动，使其能够快速恢复坚韧的水凝胶

摘要：由于分子氢键相互作用动力学缓慢，要实现快速可回收的水凝胶仍然是一个挑战。这项工作首次报道了聚丙烯酰胺（PAM）单个网络内基于海藻糖（Tre）的分子运动机制，该机制加速了氢键相互作用的动力学，从而赋予水凝胶高韧性、快速的形状和机械可恢复性。结果PAM@Tre水凝胶能够在500%的应变下在10000次加载/卸载循环后完全恢复形状。即使在2500%的应变下拉伸，它也可以在10秒内恢复到原来的形状。此外，海藻糖的分子运动也赋予PAM@Tre水凝胶的断裂能和韧性分别高达~9000 J m–2和~1600 kJ m–3，对静态和动态穿孔都具有很强的抵抗力。这个PAM@Tre因此，水凝胶被认为在保护装置、仿生皮肤、软致动器和可拉伸电子产品方面具有巨大的潜力。图形摘要

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来源期刊

International Journal of Smart and Nano Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

6.30

自引率

5.10%

发文量

审稿时长

11 weeks

期刊介绍： The central aim of International Journal of Smart and Nano Materials is to publish original results, critical reviews, technical discussion, and book reviews related to this compelling research field: smart and nano materials, and their applications. The papers published in this journal will provide cutting edge information and instructive research guidance, encouraging more scientists to make their contribution to this dynamic research field.