MDI型聚氨酯印迹聚合物的制备及其对Cr(Ⅲ)的吸附性能  

Preparation and Adsorption Properties of MDI Polyurethane Imprinted Polymer for Cr(Ⅲ)

作　　者：陈娟 黄晓飞 杨慧 鄢波 任俊鹏 赵君 周进康 CHEN Juan;HUANG Xiao-fei;YANG Hui;YAN Bo;REN Jun-peng;ZHAO Jun;ZHOU Jin-kang(College of Chemistry and Materials,Guizhou Education University,Guizhou,Guiyang 550018)

机构地区：[1]贵州师范学院化学与材料学院,贵州贵阳550018

出　　处：《贵阳学院学报(自然科学版)》2025年第1期59-64,共6页Journal of Guiyang University:Natural Sciences

基　　金：贵州省科学技术基金项目(黔科合基础-ZK(2021)一般254,〔2019〕1252);贵州省教育厅高等学校重点实验建设项目(黔教技〔2023〕021);贵州省教育厅青年科技人才成长项目(黔教合KY字〔2022〕299号);贵州省大学生创新训练项目(S202310672044)。

摘　　要：为处理重金属污染,减少污染排放,采用离子印迹技术设计制备出聚氨酯印迹聚合物。以三羟甲基丙烷(TMP)、二苯基甲烷二异氰酸酯(MDI)为原料制备出聚氨酯中间体(PU),在PU结构上接枝引入螯合剂4-氨基苯硫酚(AOP),加入模板三价铬离子和交联剂,将模板包覆或镶嵌在PU、AOP、交联剂组成的交联网络中得到聚氨酯印迹聚合物(SIIPs)。采用电子扫描电镜、红外光谱、X射线衍射对其结构进行表征。将聚氨酯印迹聚合物作为吸附材料进行吸附实验,考察初始浓度、时间、温度和吸附体系酸度对Cr(Ⅲ)吸附量的影响。结果表明,在常温下,Cr(Ⅲ)浓度为40 mg/L吸附120 min时,吸附量达到39.5 mg/g,吸附率为98.8%,可重复使用5次,吸附率仍然保持在87.5%以上;SIIPs在Cr(Ⅲ)和Zn(Ⅱ)组成的混合体系中,选择性系数ηCr(Ⅲ)/ηZn(Ⅱ)达到4.01,显示出较好的印迹效果。In order to deal with heavy metal pollution and reduce pollution discharge,polyurethane imprinting polymer was designed and prepared by ion imprinting technology.Polyurethane intermediate(PU)was prepared from trimethylol propane(TMP)and diphenylmethane diisocyanate(MDI).The chelating agent 4-aminophenthiophenol(AOP)was grafted onto PU structure,and template trivalent chromium ion and crosslinking agent were added.Polyurethane imprinted polymer(SIIPs)was obtained by coating or embedding the template in the crosslinking network composed of PU,AOP and crosslinker.The structure was characterized by electron scanning electron microscopy,infrared spectroscopy and X-ray diffraction.The adsorption of Cr(Ⅲ)by polyurethane imprinted polymer was investigated.The results showed that at room temperature,when the concentration of Cr(Ⅲ)was 40 mg/L for 120 min,the adsorption capacity reached 39.5 mg/g,the adsorption rate was 98.8%,it could be reused for 5 times,and the adsorption rate was still above 87.5%at normal temperature.In the mixed system composed of Cr(Ⅲ)and Zn(Ⅱ),the selectivity coefficient ηCr(Ⅲ)/ηZn(Ⅱ)reached 4.01,indicating a good imprinting effect.

关 键 词：聚氨酯预聚体 螯合剂 印迹聚氨酯 吸附 三价铬离子 

分 类 号：O69[理学—化学]