文献类型：期刊文献

英文题名：Tough and Self-Healing Chitosan/Poly(acrylamide-co-acrylic acid) Double Network Hydrogels

作者：Shi, Aihua[1,2];Dai, Xiangyi[3];Jing, Zhanxin[3]

机构：[1]Xi An Jiao Tong Univ, Affiliated Hosp 1, Natl Local Joint Engn Res Ctr Precis Surg & Regen, Xian 710061, Shaanxi, Peoples R China;[2]Xi An Jiao Tong Univ, Affiliated Hosp 1, Regenerat Med & Surg Engn Res Ctr Shaanxi Prov, Xian 710061, Shaanxi, Peoples R China;[3]Guangdong Ocean Univ, Dept Appl Chem, Zhanjiang 524088, Guangdong, Peoples R China

年份：2020

卷号：62

期号：3

起止页码：228

外文期刊名：POLYMER SCIENCE SERIES A

收录：SCI-EXPANDED(收录号：WOS:000540141400009)、、EI(收录号：20201208312246)、Scopus(收录号：2-s2.0-85081638652)、WOS

基金：This research was supported by the Fundamental Research Funds for the Central Universities (xjj2018269).

语种：英文

外文摘要：Chitosan/poly(acrylamide-co-acrylic acid) double network hydrogels based on non-covalent bond and winding between molecular chains were synthesized by copolymerization reaction in the presence of Fe3+. The formation mechanism of chitosan/poly(acrylamide-co-acrylic acid) double network hydrogels was analyzed using UV-Vis spectra and FTIR, revealing that Fe(3+)could form the electrostatic interaction with -COO(-)group in poly(acrylamide-co-acrylic acid) chains, and the -COOH form also the hydrogen bond also with -CONH(2)in poly(acrylamide-co-acrylic acid) chains or -NH(2)in chitosan chains. Mechanical properties of the prepared double network hydrogels were investigated by rheological and mechanical measurements. These results indicated that the chitosan/poly(acrylamide-co-acrylic acid) double network hydrogels present good recovery ability. The tensile strength and elongation at break of the synthesized hydrogel could reach 141.9 kPa and 18.2 mm/mm, respectively, their compressive strength could reach 1.76 MPa at strain of 85%. In addition, the synthesized hydrogels can maintain good self-healing capacity owing to the dynamically reversible bonds (ionic bond and hydrogel bonding). This work provides a facile method for the synthesis of hydrogels with toughness and self-healing capacity. The synthesized chitosan/poly(acrylamide-co-acrylic acid) double network hydrogels would have a great potential applications in a diverse range.