结晶紫分子印迹微球的合成及其性能

Synthesis and Properties of Crystal Violet Molecularly Imprinted Polymer Microspheres

以结晶紫(CV)为模板分子、α-甲基丙烯酸(MAA)为功能单体、二甲基丙烯酸乙二醇酯(EGDMA)为交联剂,采用沉淀聚合法合成结晶紫分子印迹微球。同时,考察合成过程中不同交联剂、模板分子与MAA的配比以及交联剂用量对微球性能的影响。结果表明:采用恒温水浴振荡法,以30 mL乙腈为溶剂,模板分子、功能单体和交联剂物质的量比为1∶4∶20,所制备的聚合物微球最大吸附量Q为39.1μmol/g,分离因子(α)和印迹效率因子(β)分别为3.76和3.18,对目标分子结晶紫具有良好的特异性识别和吸附能力。

Crystal violet(CV)molecularly imprinted polymer microspheres were synthesized by precipitation polymerization using crystal violet as template,α-methacrylic acid(MAA)as functional monomer and ethylene glycol dimethacrylate(EGDMA)as crosslinker.Meanwhile,the effects of different crosslinkers,molar ratio of crystal violet to MAA,and dosage of crosslinker on the properties of microspheres were also investigated.The results showed that under the optimal conditions of shaking bath,30 mL acetonitrile as solvent,n(CV)∶n(MAA)∶n(EGDMA)=1∶4∶20,the prepared polymer microspheres exhibited excellent properties.The maximum adsorption capacity(Q)of polymer microspheres was 39.1μmol/g,and the separation factor(α)and imprinting efficiency factor(β)were 3.76 and 3.18,respectively.The microspheres had good identification and adsorption ability to target molecule target molecular crystal violet.