Toughening Hydrogels by Immersing with Oppositely Charged Polymers

被引：8

作者：

Li, Yang ^{[1
]}

Peng, Xin ^{[1
]}

Zhao, Di ^{[1
]}

Shi, Shengjie ^{[1
]}

He, Changcheng ^{[1
]}

Wang, Huiliang ^{[1
]}

机构：

[1] Beijing Normal Univ, Coll Chem, Beijing Key Lab Energy Convers & Storage Mat, Beijing 100875, Peoples R China

来源：

JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS | 2016年 / 54卷 / 23期

基金：

中国国家自然科学基金;

关键词：

charged polymers; electrostatic interactions; hydrogels; mechanical properties; tough; DOUBLE-NETWORK HYDROGELS; NANOCOMPOSITE HYDROGELS; MECHANICAL-PROPERTIES; SUPER-TOUGH; STRENGTH; POLYMERIZATION;

D O I：

10.1002/polb.24233

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A very simple yet novel strategy to significantly enhance the mechanical properties of hydrogels is reported. Poly(acrylic acid) (PAA) hydrogels with aligned macroporous channels are immersed in the aqueous solutions of poly(dimethyl diallyl ammonium chloride) (PDMDAAC). Strong electrostatic interactions are formed between the anionic PAA and cationic PDMDAAC chains. In the resultant PAA/PDMDAAC hybrid hydrogels, the mass ratio of PDMDAAC to PAA is about 0.2 and PDMDAAC is uniformly distributed throughout the gels. The mechanical properties of the formed hybrid hydrogels are largely enhanced in comparison with the original PAA hydrogels. The hybrid hydrogels exhibit high tensile strengths (0.38-1.73 MPa), elastic moduli (0.21-1.59 MPa) and toughness (up to 3.0 MJ/m(3)), about several to more than 10 times those of the corresponding PAA hydrogels. In addition, the PAA/PDMDAAC hydrogels also show excellent and very rapid shape recovery ability in both air and deionized water. (C) 2016 Wiley Periodicals, Inc.

引用

页码：2432 / 2441

页数：10

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