P(AM-AA)/PVA/PAMPS双网络水凝胶的制备与性能研究
Preparation and Properties of P(AM-AA)/PVA/PAMPS Double Network Hydrogels
DOI: 10.12677/MS.2019.95069, PDF,    科研立项经费支持
作者: 白兰涵, 杨倩玉, 赵星宇, 李先玉, 周 怡, 附怡清, 徐华梁, 严小卫：四川轻化工大学材料科学与工程学院，四川 自贡；张雪梅：四川轻化工大学材料科学与工程学院，四川 自贡；四川大学高分子科学与工程学院，四川 成都；邹智挥, 高 晨*：四川轻化工大学材料科学与工程学院，四川 自贡；四川智仁发环保科技有限公司，四川 自贡
关键词: 水凝胶；双网络；形状记忆；pH响应性；溶胀性能；Hydrogel； Double Network； Shape Memory； pH Responsive； Swelling Property
摘要: 以过硫酸钾(K2S2O8)为引发剂，以丙烯酸(AA)和丙烯酰胺(AM)为单体，以N,N’-亚甲基双丙烯酰胺(MBAA)为交联剂，以聚乙烯醇(PVA)和聚2-丙烯酰胺基-2-甲基丙磺酸(PAMPS)为互穿高分子链，制备了共价交联半互穿网络水凝胶(sIPN)。随后通过冷冻–恢复室温三次循环，PVA链形成微晶交联网络，获得共价-微晶双网络水凝胶(CMDN)。再将水凝胶浸泡于氯化铁溶液中，通过阴阳离子静电吸附形成离子交联网络，获得P(AM-AA)/PVA/PAMPS共价–微晶–离子双网络(CMIDN)水凝胶。拉伸性能测试表明0.2PAMPS-0.4FeCl3水凝胶具备最好的力学性能，拉伸强度为3.90 MPa，断裂伸长率为278.0%。CMIDN水凝胶具有良好的还原响应形状记忆性能，在1 M抗坏血酸溶液中，0.2PAMPS-0.4FeCl3与0.5PAMPS-0.4FeCl3水凝胶分别可在120 min和150 min内恢复起始形状。
Abstract: Covalent cross-linking semi-interpenetrating network hydrogels (sIPN) were fabricated with po-tassium persulfate (K2S2O8) as initiator, acrylic acid (AA) and acrylamide (AM) as monomers, N,N’-methylenebisacrylamide (MBAA) as crosslinking agent, with poly(vinyl alcohol) (PVA) and poly(2-acrylamide-2-methyl propane sulfonic acid) (PAMPS) as interpenetrating polymer chains. Covalent-microcrystalline double network (CMDN) hydrogels were obtained by freeze-thaw method, which could promote the formation of microcrystalline crosslinking of PVA. Then P(AM-AA)/PVA/PAMPS covalent-microcrystalline-ionic double network (CMIDN) hydrogels were obtained by immersing CMDN hydrogels in ferric chloride solutions with different concentrations. The tensile tests showed that 0.2PAMPS-0.4FeCl3 hydrogel showed the best mechanical properties, with a tensile strength of 3.90 MPa and a breaking elongation of 278.0%. After being immersed in 1 M ascorbic acid solution, 0.2PAMPS-0.4FeCl3 and 0.5PAMPS-0.4FeCl3 hydrogels could recover to their original shape within 120 min and 150 min, respectively.
文章引用：白兰涵, 张雪梅, 邹智挥, 杨倩玉, 赵星宇, 李先玉, 周怡, 附怡清, 徐华梁, 严小卫, 高晨. P(AM-AA)/PVA/PAMPS双网络水凝胶的制备与性能研究[J]. 材料科学, 2019, 9(5): 537-548. https://doi.org/10.12677/MS.2019.95069

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