文献类型：期刊文献

英文题名：Synthesis of poly(acrylic acid)–Fe3+/gelatin/poly(vinyl alcohol) triple-network supramolecular hydrogels with high toughness, high strength and self-healing properties

作者：Jing, Zhanxin[1]; Zhang, Qiangshan[1]; Liang, Yan-Qiu[1]; Zhang, Zhaoxia[1]; Hong, Pengzhi[1]; Li, Yong[1]

机构：[1] College of Chemistry and Environment, Guangdong Ocean University, Zhanjiang, China

年份：2019

卷号：68

期号：10

起止页码：1710

外文期刊名：Polymer International

收录：EI(收录号：20193207272546)、Scopus(收录号：2-s2.0-85072152942)

语种：英文

外文关键词：Carboxylic acids - Hydrogen bonds - Chemical industry - Self-healing materials - Supramolecular chemistry - Hydrogen - Tensile strength

外文摘要：Hydrogels with good mechanical and self-healing properties are of great importance for various applications. Poly(acrylic acid)–Fe3+/gelatin/poly(vinyl alcohol) (PAA-Fe3+/Gelatin/PVA) triple-network supramolecular hydrogels were synthesized by a simple one-pot method of copolymerization, cooling and freezing/thawing. The PAA-Fe3+/Gelatin/PVA triple-network hydrogels exhibit superior toughness, strength and recovery capacity compared to single- and double-network hydrogels. The mechanical properties of the synthesized hydrogels could be tailored by adjusting the compositions. The PAA-Fe3+/Gelatin/PVA triple-network hydrogel with 0.20 mmol Fe3+, 3% gelatin and 15% PVA could achieve good mechanical properties, the tensile strength and elongation at break being 239.6?kPa and 12.8?mm mm?1, respectively, and the compression strength reaching 16.7?MPa under a deformation of about 91.5%. The synthesized PAA-Fe3+/Gelatin/PVA triple-network hydrogels have good self-healing properties owing to metal coordination between Fe3+ and carboxylic groups, hydrogen bonding between the gelatin chains and hydrogen bonding between the PVA chains. Healed PAA-Fe3+(0.20)/Gelatin3%/PVA15% triple-network hydrogels sustain a tensile strength of up to 231.4?kPa, which is around 96.6% of the tensile strength of the original samples. Therefore, the synthesized triple-network supramolecular hydrogels would provide a new strategy for gel research and expand the potential for their application. ? 2019 Society of Chemical Industry. ? 2019 Society of Chemical Industry