文献类型：期刊文献

英文题名：Ultrastretchable, Tough, and Notch-Insensitive Hydrogels Formed with Spherical Polymer Brush Crosslinker

作者：Zhang, Rui[1];Wang, Lei[1];Shen, Zheqi[1];Li, Min[1];Guo, Xuhong[1];Yao, Yuan[2]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Mat Sci & Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2017

卷号：38

期号：22

外文期刊名：MACROMOLECULAR RAPID COMMUNICATIONS

收录：;EI(收录号：20174704421569);WOS:【SCI-EXPANDED(收录号:WOS:000417215700004)】；

基金：This work was supported by the National Natural Science Foundation of China (21374029, 51573088, 21476143) and the Fundamental Research Funds for the central universities of China (22220131011).

语种：英文

外文关键词：hydrogen bonds; notch-insensitivity; spherical polymer brushes; tough hydrogels

摘要：Spherical polymer brushes, poly(acrylic acid) (PAA)-grafted polystyrene nanoparticle (PAA@PS), are employed as the macro-crosslinker to prepare PAA hydrogels. Benefitting from the innumerable hydrogen bonds between highly entangled PAA chains both in bulk and on the polymer brush, the PAA/PAA@PS hydrogels combine desirable stretchability, toughness, and notch-insensitivity. The uniaxial tensile tests show a very high fracture elongation up to 9.1 x 10(3)% while the fracture toughness reaches 3.0 MJ m(-3) and the maximum swelling ratio of the hydrogel can be 2.0 x 10(3) as well. After being loaded with silver nanoparticles, the PAA/PAA@PS hydrogels are employed as a recyclable catalyst successfully.