光响应纤维素基印迹吸附材料的制备及光再生性能  

Preparation and photo-regeneration properties of photo-responsive cellulose based imprinted adsorption materials

作　　者：王璐颖 邱越洺 张睿[1] 许平凡[2] 刘以凡[1,2,3] 林春香 刘明华[1,2,3] WANG Luying;QIU Yueming;ZHANG Rui;XU Pingfan;LIU Yifan;LIN Chunxiang;LIU Minghua(College of Environment and Safety Engineering,Fuzhou University,Fuzhou 350108,China;School of Advanced Manufacturing,Fuzhou University,Jinjiang 362200,Fujian,China;Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology,Fuzhou 350108,China)

机构地区：[1]福州大学环境与安全工程学院,福州350108 [2]福州大学先进制造学院,福建晋江362200 [3]福建省农村废弃物绿色循环技术工程研究中心,福州350108

出　　处：《材料工程》2024年第2期180-189,共10页Journal of Materials Engineering

基　　金：福建省自然科学基金项目(2020J01506)。

摘　　要：光响应性吸附材料对污染物的光控释放性能,对发展吸附材料的绿色再生具有重要的意义。以纤维素为原料,偶氮苯衍生物为功能单体,以典型农药残留2,4-D为模板,采用表面引发原子转移自由基聚合(SI-ATRP)制备光响应纤维素印迹吸附剂(Cell-AB-MIP)。通过单因素实验对材料的制备条件进行优选,采用多种表征手段对材料结构和性能进行分析。结果表明:Cell-AB-MIP表面含有丰富的官能团(—COOH,N=N等),对2,4-D具有较高的特异性识别作用;偶氮苯基团的引入使得Cell-AB-MIP具备优异的光再生性能。经过紫外光照射后,Cell-AB-MIP上的偶氮苯基团将从反式构型转变为顺式构型,从而改变吸附剂对污染物的吸附亲和力,实现光控条件下的清洁脱附。在甲醇介质中光照解吸效率可达72.22%,经过5次光循环后对2,4-D的吸附百分比仍可达到83.47%;SEM及EA分析结果证实了吸附剂经紫外光照射后污染物可从吸附剂表面脱离,完成吸附剂的再生过程。The photoresponsive adsorption materials are of great significance to the light controlled release performance of pollutants and the development of green regeneration of adsorption materials.A photo-responsive cellulose based imprinted adsorbent(Cell-AB-MIP)was synthesized by surface-initiates atom transfer radical polymerization(SI-ATRP)using cellulose as raw material,azobenzene derivatives as functional monomers,and the typical pesticide residues 2,4-D as template.The synthetic conditions were optimized by single factor experiment,and the structure and performance of the material was analyzed by some characterization methods.The results show that the surface of Cell-AB-MIP contains abundant functional groups(—COOH,N=N,etc.),which have a high specific recognition effect for 2,4-D.The introduction of azobenzene group makes Cell-AB-MIP have excellent photo-induced regeneration performance.The azobenzene group on Cell-AB-MIP surface changes from trans-configuration to cis-configuration under UV irradiation,then changing the binding affinity of adsorbent for pollutants,thus realizing green regeneration via UV-light.The desorption efficiency can reach 72.22%in methanol medium under UV light irradiation.After 5 times of cycle,the adsorption percentage to 2,4-D still remains 83.47%.The analysis results of SEM and EA confirm that the adsorbed pollutants can be separated from the surface of the adsorbent after UV irradiation,completing the regeneration process.

关 键 词：纤维素 分子印迹 光响应 2 4-D 绿色再生 

分 类 号：TB34[一般工业技术—材料科学与工程] TQ352.79[化学工程]