pH调节法制备自愈合明胶/聚甲基丙烯酸甲酯-甲基丙烯酸复合水凝胶  

Preparation of self-healing gelatin/PMMS composite hydrogel by pH adjustment

作　　者：刘瑞雪[1] 周腾 利月珍 王永有 王肖宁 张晓静[1] Liu Ruixue;Zhou Teng;Li Yuezhen;Wang Yongyou;Wang Xiaoning;Zhang Xiaojing(College of Material and Chemical Engineering,Zhengzhou University of Light Industry,Henan Provincial Key Laboratory of Surface&Interface Science,Zhengzhou 450002)

机构地区：[1]郑州轻工业学院材料与化工学院河南省表界面材料重点实验室

出　　处：《化工新型材料》2019年第12期248-251,共4页New Chemical Materials

基　　金：国家自然科学基金（21474092和U1704160）;河南省留学归国人员择优资助项目（002422）

摘　　要：以甲基丙烯酸甲酯(MAA)与甲基丙烯酸(MAA)为单体,纳米SiO2为稳定剂,通过Pickering乳液聚合合成了粒径约300nm的表面负载SiO2的聚甲基丙烯酸甲酯-甲基丙烯酸乳胶粒(PMMS胶粒)。pH升高,流动性PMMS的水分散体系形成固态凝胶。PMMS与明胶的混合物在pH调节下形成具有自愈合能力的复合水凝胶。采用扫描电子显微镜观察了凝胶的微观结构,动态流变仪表征凝胶的黏弹性质及自愈合性质。结果表明:明胶/PMMS复合凝胶具有很好的自愈合性质。Poly(methyl methacrylate-methyl methacrylate)(PMMS)latex particles loaded with SiO2on the surface with particle size of about 300nm were synthesized by Pickering emulsion polymerization using methyl methacrylate(MAA)and methacrylic acid(MAA)as monomers and SiO2as stabilizer.The fluid aqueous PMMS dispersions formed a solid gel by raising pH value.The mixtures of PMMS and gelatin also formed composite hydrogel with self-healing ability through adjusting pH value.The microstructure of the gel was observed by scanning electron microscopy.The dynamic rheometer was used to characterize the viscoelastic and self-healing properties of the gel.The results shown that the gelatin/PMMS composite hydrogels had good self-healing properties.

关 键 词：PMMS乳胶粒 pH诱导凝胶化 明胶 复合凝胶 自愈合 

分 类 号：TQ427.26[化学工程]