基于聚乙二醇的可调温敏性共聚物水凝胶的制备与研究  

Synthesis and Properties of Adjustable Thermosensitive Copolymer Hydrogel Based on Polyethylene Glycol

作　　者：罗雪娇[1] 徐敏[1] 

机构地区：[1]华东师范大学物理与材料科学学院上海市磁共振重点实验室,上海200062

出　　处：《塑料工业》2017年第8期9-13,54,共6页China Plastics Industry

基　　金：国家自然科学基金项目(批准号:51273067;21544003)

摘　　要：通过自由基共聚的方法,得到了一系列以2-甲氧基乙基丙烯酸酯(MEA)和聚乙二醇甲醚丙烯酸酯(OEGA)为共聚单体的可调温敏性共聚物及水凝胶。利用液体核磁共振氢谱和凝胶渗透色谱(GPC)对共聚物的结构和分子量进行表征,通过紫外-可见分光光度计、平衡溶胀率和低场核磁共振对产物的温敏性质进行了研究。结果表明,聚合物和水凝胶的低临界溶解温度随着OEGA的投料比增加而升高,并且呈线性关系。低场核磁共振研究结果表明,水凝胶在达到低临界溶解温度时,结合水被挤出并转化为中间水和自由水。A serirs of adjustable thermosensitive copolymers and hydrogels were prepared by 2-methoxyethyl acrylate （MEA） and polyethylene glycol methyl acrylate （OEGA） through free radical copolymerization. The structures and relative molecular weights of the copolymers were characterized by nuclear magnetic resonance （1H NMR） and gel permeation chromatography （GPC）. The thermosensitive properties of the copolymers hydrogels were studied by UV-visible spectrophotometer spectroscopy （UV-Vis） , equilibrium swelling ratio and low-field nuclear magnetic resonance （LF-NMR）. The results show that the low critical solution temperature of the copolymers and hydrogels increases with the increase of OEGA feed ratio. When the hydrogels reached the lower critical solution temperature, the bound water was extruded into intermediate water and free water.

关 键 词：热敏感 自由基共聚 凝胶 

分 类 号：TQ427.26[化学工程]