Biodegradable Poly(acrylic Acid--acrylamide)/Poly(vinyl Alcohol) Double Network Hydrogels with Tunable Mechanics and High Self-healing Performance

Overview

Journal Polymers (Basel)

Publisher MDPI

Date 2019 Jun 5

PMID 31159410

Citations 12

Authors

Zhanxin Jing

Aixing Xu

Yan-Qiu Liang

Zhaoxia Zhang

Chuanming Yu

Pengzhi Hong

Yong Li

Affiliations

Soon will be listed here.

Abstract

We proposed a novel strategy in the fabrication of biodegradable poly(acrylic acid--acrylamide)/poly(vinyl alcohol) (P(AAc--Am)/PVA) double network (DN) hydrogels with good mechanical and self-healing properties. In the DN hydrogel system, P(AAc--Am) polymers form a network through the ionic coordinates between -COO- and Fe and hydrogen bonding between -COOH and -CONH, 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--Am)/PVA DN hydrogels increase as the acrylamide and Fe concentrations increase. At 0.05 mmol of Fe and 50% of acrylamide, tensile strength and elongation at break of P(AAc--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--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--Am)/PVA DN hydrogels have a potential application prospect in various biomedical fields.

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