文献类型：期刊文献

英文题名：Biodegradable Poly(acrylic acid-co-acrylamide)/Poly(vinyl alcohol) Double Network Hydrogels with Tunable Mechanics and High Self-healing Performance

作者：Jing, Zhanxin[1];Xu, Aixing[1];Liang, Yan-Qiu[1];Zhang, Zhaoxia[1];Yu, Chuanming[1];Hong, Pengzhi[1];Li, Yong[1]

机构：[1]Guangdong Ocean Univ, Coll Chem & Environm, Zhanjiang 524088, Guangdong, Peoples R China

年份：2019

卷号：11

期号：6

外文期刊名：POLYMERS

收录：SCI-EXPANDED(收录号：WOS:000473819100024)、、EI(收录号：20192507072558)、Scopus(收录号：2-s2.0-85067349387)、WOS

基金：This research was funded by the Natural Science Foundation of Guangdong Province (2018A03037020), Project of enhancing school with innovation of Guangdong ocean university (2017KQNCX089), Science and Technology Planning Project of Zhanjiang City (2017A02016) and Scientific Research Start-Up Funds of Guangdong Ocean University (to Zhanxin Jing).

语种：英文

外文关键词：hydrogel; double network; toughness; self-healing; biodegradable

外文摘要：We proposed a novel strategy in the fabrication of biodegradable poly(acrylic acid-co-acrylamide)/poly(vinyl alcohol) (P(AAc-co-Am)/PVA) double network (DN) hydrogels with good mechanical and self-healing properties. In the DN hydrogel system, P(AAc-co-Am) polymers form a network through the ionic coordinates between -COO- and Fe3+ and hydrogen bonding between -COOH and -CONH2, while another network is fabricated by the complexation between PVA and borax. The influences of the composition on the rheological behaviors and mechanical properties of the synthesized DN hydrogels were investigated. The rheological measurements revealed that the viscoelasticity and stiffness of the P(AAc-co-Am)/PVA DN hydrogels increase as the acrylamide and Fe3+ concentrations increase. At 0.05 mmol of Fe3+ and 50% of acrylamide, tensile strength and elongation at break of P(AAc-co-Am)/PVA DN hydrogels could reach 329.5 KPa and 12.9 mm/mm, respectively. These properties arise from the dynamic reversible bonds existed in the P(AAc-co-Am)/PVA DN hydrogels. These reversible bonds also give good self-healing properties, and the maximum self-healing efficiency of P(AAc-co-Am)/PVA DN hydrogels is up to 96.4%. The degradation test of synthesized DN hydrogels was also conducted under simulated physiological conditions and the weight loss could reach 74% in the simulated intestinal fluid. According to the results presented here, the synthesized P(AAc-co-Am)/PVA DN hydrogels have a potential application prospect in various biomedical fields.