Fe-MIL-101@白藜芦醇印迹复合材料的合成及其吸附性能

Synthesis of Fe-MIL-101@ resveratrol imprinted composites and study on their adsorption properties

以MIL-101(Fe)为基质,通过表面接枝白藜芦醇印迹聚合物获得一种对白藜芦醇具有高选择吸附能力的新型印迹复合材料。利用红外光谱仪、扫描电镜以及X射线衍射仪对印迹材料的表面功能基团、颗粒形状及骨架结构进行表征。研究了该印迹复合材料的吸附动力学、热力学及选择性。结果表明,复合印迹材料的印迹效率达4.577,其对模板的选择因子高达3.695,对白藜芦醇也具有较高吸附能力,吸附量为24.9 mg/g。Scatchard分析显示印迹材料表面主要有两类吸附位点。另外,该印迹材料可重复使用,吸附性能变化不大。以Fe-MIL-101@白藜芦醇印迹复合材料为吸附剂,固相萃取虎杖粗提物中的白藜芦醇时,能够较好地分离和富集目标物。

A novel imprint composite material with high-selective adsorption capacity to resveratrol is prepared by grafting molecularly imprinted polymer on the surface of MIL-101(Fe) matrix.Surface functional groups, particle shape and skeleton structure of the material are characterized by means of infrared spectroscopy, scanning electron microscopy and X-ray diffraction.Adsorption kinetics, thermodynamics and selectivity of the material are also studied.Results show that the imprint composite material has an imprinting efficiency of 4.577,a higher selection factor of 3.695 to the template, as well as a higher adsorption capacity of 24.9 mg·g-1to resveratrol.Scatchard analysis shows there are mainly two types of adsorption sites on the surface of the imprint composite material.In addition, this material can be reused for many times with little change in its adsorption performance.This imprint composite material can separate and enrich target substance well when it is used as the adsorbent for solid phase extraction of resveratrol from crude extract of Polygonum Cuspidatum.