基于微凝胶的复合自振荡水凝胶的制备及性能  

Synthesis and Property of Composite Self-Oscillating Hydrogel Based on Microgels

作　　者：李秀琛 邓瑾妮[1] 潘毅[1] 代海渝 郑朝辉[1] 丁小斌[1] Xiuchen Li;Jinni Deng;Yi Pan;Haiyu Dai;Zhaohui Zheng;Xiaobin Ding(Chengdu Institute of Organic Chemistry,Chinese Academy of Sciences,Chengdu 610041,China;University of Chinese Academy of Sciences,Beijing 100081,China;School of Mechanical Engineering,Chengdu University,Chengdu 610106,China)

机构地区：[1]中国科学院成都有机化学研究所,四川成都610041 [2]中国科学院大学,北京100081 [3]成都大学机械工程学院,四川成都610106

出　　处：《高分子材料科学与工程》2022年第11期22-27,共6页Polymer Materials Science & Engineering

基　　金：国家自然科学基金面上项目(51373175)。

摘　　要：构建基于微凝胶的复合水凝胶是加快水凝胶响应速度的有效方法。为了改善自振荡水凝胶体系中存在的化学-机械振荡(C-M)延迟问题,文中通过表面含有多个双键的微凝胶作为交联剂构建微凝胶复合自振荡水凝胶。先利用乳液聚合法制备了分散性良好的表面带有双键的微凝胶,再以微凝胶为交联点制备微凝胶复合自振荡水凝胶。探究了微凝胶作为自振荡水凝胶的交联剂对其存在的C-M延迟的影响。结果表明,微凝胶复合自振荡水凝胶的网孔结构疏松并且呈类球状,有利于增大其扩散系数;通过显微镜监测,在多个交联密度下,未发现C-M延迟,且振荡行为(周期和振幅)都能保持稳定。The construction of microgel-based composite hydrogels is an effective method to accelerate the response speed of hydrogels.To improve the chemical-mechanical oscillation(C-M)delay in the self-oscillating gel system,this paper innovatively constructed a microgel composite self-oscillating hydrogel using the microgel bearing double bonds on the surface as crosslinker.First,the microgel bearing unsaturated double bonds with good dispersity was fabricated via the emulsion polymerization method.Then microgel composite self-oscillating hydrogels were prepared by using the microgel as crosslinker.The effect of the microgel as crosslinker for self-oscillating hydrogels on the C-M delay was explored.The results show that the mesh structure of the microgel composite self-oscillating hydrogels is loose and spherical,which is beneficial to increase its diffusion coefficient;through microscope monitoring,under multiple crosslinking densities,no C-M delay is found,and the oscillation behavior(period and amplitude)can remain stable.

关 键 词：微凝胶 自振荡水凝胶 化学-机械振荡延迟 稳定 

分 类 号：TQ427.26[化学工程]