北京师范大学学报（自然科学版）2016，Vol.52Issue(5)：561-565,5.DOI:10.16360/j.cnki.jbnuns.2016.05.005
基于协同氢键作用的高强度聚乙烯醇聚丙烯酸水凝胶∗
Tough polyvinyl alcohol-polyacrylic acid hydrogels based on cooperative hydrogen bonding
摘要
Abstract
Tough hydrogels can be fabricated by cooperative hydrogen bonding between pre-existing polymer and in situ polymerized polymer chains.Tough PVA-in situ-PAA hydrogels templated on PVA were synthesized.Effect of feeding ratio (c(PVA)/c(AA))on formation and mechanical properties of hydrogels was studied.Low concentration of PVA enhanced significantly tensile strength, modulus and elongation of hydrogels;further enhancement was seen with increasing PVA content.PVA-in situ-PAA hydrogels exhibited excellent mechanical properties,with tensile strength up to 0.9 MPa and elongation of more than 2000%.Such hydrogels also showed excellent resilience and stress relaxation behavior,as indicated by high resilience ratios of more than 80%,retained stresses more than 90% under large extension up to 1500%.关键词
协同氢键/水凝胶/力学性能/回弹性/应力松弛Key words
cooperative hydrogen bonding/hydrogels/mechanical property/resilience/stress relaxation分类
化学化工引用本文复制引用
白晴文,汪辉亮..基于协同氢键作用的高强度聚乙烯醇聚丙烯酸水凝胶∗[J].北京师范大学学报（自然科学版）,2016,52(5):561-565,5.基金项目
国家自然科学基金资助项目(21274013) （21274013）
本科生科研基金及国家大学生创新实验计划资助项目 （）
