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温敏性水杨酸分子印迹水凝胶的合成与性能研究
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郭小伟,高云玲,姚克俭 浙江工业大学化学工程与材料学院绿色合成技术国家重点实验室培育基地 
基金项目:国家自然科学基金资助(20807037)
中文摘要:以水杨酸为模板分子,丙烯酰胺为功能单体,N-异丙基丙烯酰胺为温敏单体,乙二醇二甲基丙烯酸酯为交联剂,偶氮二异丁腈为引发剂,采用本体聚合法,60 ℃热聚合制备了温度敏感的分子印迹(MIP)水凝胶,其最低临界溶解温度(LCST)在40 ℃左右。该分子印迹水凝胶对水杨酸显示了高的选择识别性,非分子印迹水凝胶则表现出低的选择性。温敏性分子印迹水凝胶的吸附容量达6.35 mg/g,是非印迹水凝胶的3.66倍。相对于未添加温敏单体的分子印迹聚合物,温敏性水杨酸分子印迹水凝胶对目标分子的吸附和洗脱效率分别提高33.3%和50%,并实现了温度响应的水凝胶结合、释放水杨酸的功能。
中文关键词:温敏水凝胶  特异选择性  分子印迹聚合物  吸附效率  释放时间
 
Preparation and Properties of Temperature-responsive Molecularly Imprinted Polymer Hydrogels to Salicylic Acid
Abstract:A highly selective temperature-responsive molecularly imprinted polymer(MIP) hydrogel to salicylic acid (SA)was prepared by bulk polymerization at 60 ℃,using salicylic acid as template molecule,acrylamide as functional monomer,N-isopropyl acrylamide as temperature-responsive monomer,ethylene glycol dimethacrylate as cross-linker,and azobisisobutyronitrile as the initiator.The lower critical solution temperature(LCST) of molecularly imprinted polymer hydrogels is about 40 ℃.The temperature responsive molecularly imprinted polymer hydrogels showed good selectivity for SA,while non-imprinted hydrogels showed low selectivity,relative to those analogues of SA.The maximum adsorption capacity of the temperature-responsive molecularly imprinted polymer hydrogels reaches up to 6.35 mg/g,which is 3.66 times for that of non-imprinted polymer hydrogels.Compared with the molecularly imprinted polymer without adding temperature-responsive monomers,the adsorption and elution efficiency of the MIP hydrogels with SA were increased by 33.3% and 50%,respectively.Moreover,the temperature-responsive hydrogels could absorb or release SA when the temperature was changed.
Key Words:Temperature-responsive hydrogels  specific selectivity  molecularly imprinted polymer  adsorption efficiency  release time
引用本文:郭小伟,高云玲,姚克俭.温敏性水杨酸分子印迹水凝胶的合成与性能研究[J].分析测试学报,2012,31(10):1303-1308.
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