镉离子表面分子印迹聚合物的制备及其表征_食品科学与工程.rar

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  • 更新时间:2016-08-07
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摘要:以氯化镉为模板分子,壳聚糖为功能单体,γ-(2,3环氧丙氧)丙基三甲氧基硅烷(KH-560)作为交联剂同时加入一定量的活化硅胶利用表面分子印迹技术和溶胶-凝胶法制备了镉离子印迹聚合物。

   在制作过程中进行条件优化,通过对实验中单因素:模板分子与交联剂不同摩尔比,交联反应时间,壳聚糖的用量,凝胶干燥温度的的研究。确定镉离子印迹聚合物的最佳制作方法:模板分子与交联剂的摩尔比为1:16,交联反应时间为4h,壳聚糖的用量为1g,凝胶干燥温度为25℃,并采用0.5mol/L的盐酸在超声的条件下进行洗脱,并用原子吸收分光光度法测量洗脱后的样品的吸光度,此结果是通过正交试验后得出的吸附性能最佳的聚合物样品。以此方法制作出的样品的最大饱和吸附量为31.75mg/g。

关键词:镉;印迹聚合物;表面分子印迹技术;吸光度;特异性吸附

 

Abstract:as a template molecule, Chitosan as a functional monomer, 3-methoxy glycidyl ether epoxy propyl KH-560 silane as crosslinker while adding a certain amount of activated silica gel using surface Molecular Imprinting technology and preparation of cadmium ion imprinted sol-gel polymer.

   Optimization in the production process conditions, by means of single factor experiments into: template molecules with different mole ratio of cross-Linking agent, crosslinking reaction time, dosage of chitosan, the gel drying temperature. To determine the cadmium ion imprinting polymer in the best production method :Template molecular and the molar ratio of cross-Linking agent as 1:16, crosslinking reaction time is 4 h, the dosage of the chitosan is 1 g, geL drying temperature is 25 ℃, and use the 0.5 mol/L HCL in ultrasound under the conditions of elution, and atomic absorption spectrophotometry measuring the absorbance of samples after elution, this result is through the orthogonal test optimum polymer adsorption performance of the samples. Method to produce the sample of the Largest saturated adsorption capacity of 31.75 mg/g. 

Keywords: Cadmium  Molecularly imprinted polymer  Surface molecular imprinting technique   Absorbance   Specific adsorption

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