溶胶-凝胶法制备鞣花酸表面分子印迹聚合物

doi:10.13218/j.cnki.csdc.2018.12.004

Abstract

Abstract: Molecularly imprinted polymers (MIPs) was prepared at room temperature using silica gel as the supporter,ellagic acid as the template molecule,3-aminopropyltriethoxysilane (APTES) as the functional monomer,and tetraethoxysilicane (TEOS) as the cross-linker.The surface morphology of MIP was characterized by SEM.The adsorption of ellagic acid onto MIP was evaluated by static adsorption experiment.The results indicate that the adsorption of ellagic acid on MIP can reach equilibrium within 40 min;the imprinting factor is 2.68;the saturated adsorption capacity is as high as 70 mg/g.In contrast to non-imprinted polymer (NIP),the MIP exhibits high selectivity and specific recognition towards ellagic acid.The results of nonlinear regression of adsorption data show that the adsorption kinetics and adsorption isotherms data of MIP fit well with pseudo-second-order kinetic model and Langmuir isotherm model,respectively.Furthermore,the adsorption capacity of MIP maintains above 90% after five regeneration cycles,indicative of excellent reusability.The prepared MIP can be severed as an excellent functional material for selective adsorption of ellagic acid,which has application potential for the separation and purification of ellagic acid in complex matrix.

Key words: ellagic acid, surface molecularly imprinted polymer, sol-gel method, silica gel supporter, selective adsorption, cosmetics

CLC Number:

TQ658

ZHI Ke-ke, XU Lu, ZHANG Ya-gang, WANG Lu-lu, YASIN Akram, ZHANG Le-tao. Preparation of molecularly imprinted polymers via sol-gel surface imprinting for selectiveadsorption of ellagic acid[J].China Surfactant Detergent & Cosmetics, 2018, 48(12): 684-690.

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Preparation of molecularly imprinted polymers via sol-gel surface imprinting for selectiveadsorption of ellagic acid

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