文献类型：期刊文献

英文题名：A facile approach to obtain highly tough and stretchable LAPONITE?-based nanocomposite hydrogels

作者：Liu, Xinyu[1];Niu, Xiaofeng[1];Fu, Zhinan[1];Liu, Liqun[1];Bai, Shengyu[1];Wang, Jie[1];Li, Li[1];Wang, Yiming[1];Guo, Xuhong[1,2]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Shihezi Univ, Engn Res Ctr Mat Chem Engn Xinjiang Bingtuan, Shihezi 832000, Xinjiang, Peoples R China

年份：2020

卷号：16

期号：36

起止页码：8394

外文期刊名：SOFT MATTER

收录：;EI(收录号：20204009299745);WOS:【SCI-EXPANDED(收录号:WOS:000571980300005)】；

基金：We gratefully thank the National Natural Science Foundation of China (21908061, 51761135128 and 51773061), the Fundamental Research Funds for the Central Universities (JKA012016012, 22221818010 and 222201917013) and the Key Scientific and Technological Project of Xinjiang Bingtuan (2018AB025) for the financial support.

语种：英文

外文关键词：Electrostatics - Hydrogels - Nanocomposites

摘要：LAPONITE (R) sheets have been widely used for the preparation of tough nanocomposite hydrogels for enticing applications; however, their inferior dispersion in aqueous media resulting from electrostatic interactions between the nanosheets remarkably limits further improvements in the mechanical performances of the nanocomposite hydrogels. Here, we show a simple approach to dramatically accelerate the dispersion of LAPONITE (R) sheets in water, and in turn further improve the mechanical performances of the resulting nanocomposite hydrogels. Upon addition of poly(acrylic acid) (PAA), the electrostatic interactions between the LAPONITE (R) sheets were effectively reduced due to the adsorption of PAA onto the positively charged edges of the LAPONITE (R) sheets, thereby accelerating the dispersion of the LAPONITE (R) sheets in water. On this basis, a series of polyacrylamide (PAAm) hydrogels with a high content of LAPONITE (R) sheets was prepared, showing excellent tensile strength, stretchability, and anti-fatigue properties. This study will be beneficial for the preparation of LAPONITE (R)-based nanocomposite hydrogels bearing excellent mechanical properties for new applications.