学校代号*****学号************
中华人民共和国票据法分类号O632密级公开
硕士学位论文
学位申请人何香
指导教师王建方教授
学院名称化学学院
学科专业化学工程
研究方向功能高分子
二零一八年五月十五日
Preparation,modification and properties of magnetic acrylic adsorptive resin
Candidate Xiang He
Supervisor Prof.Jianfang Wange
College Chemistry
Program Chemistry Engineering
Specialization Functional Polymer
Degree Engineering Master
University XiangTan University
3s lady
Date May,2018
两个铁球同时着地
摘要
常州技术师范学院当前阶段随着经济发展而引起的系列水资源问题相继发生，吸附树脂在水处理方面有着其他树脂无法比拟的优点。磁性丙烯酸树脂作为一种典型的吸附树脂，因其机械性能良好，吸附速率快、易分离等多项优点，已经得到了越来越广泛的应用。丙烯酸树脂上具有一定的活性基团，在合适的条件下可以通过添加改性材料对其进行改性，以改善其化学和物理性质，使其更加具备应用上的优势。
本论文主要就以下几个方面进行考察和研究：
（1）采用悬浮聚合法成功合成出磁性丙烯酸树脂，通过调节单体配比、致孔剂含量以及致孔剂种类合成系列磁性丙烯酸树脂，合成出了性能最优的比表面积高达549m2/g的D-70-T-125树脂。树脂的磁分离效果良好，粒径主要分布在100~250μm。研究发现，二乙烯苯含量与树脂的比表面积之间的相关系数可达0.998。
（2）选取性能最优的磁性丙烯酸树脂D-70-T-125，分别利用三甲胺和二硫代次膦酸对其进行改性。研究发现，胺基化后的树脂比表面积减少了270m2/g，比饱和磁化强度减少了0.7emu/g，经过二（4-羟基-2-三氟甲基）苯基二硫代次膦酸改性后的树脂的比表面积减少了380m2/g，孔道体积出现了相应的减小，并且利用XPS测定改性程度发现，D-70-T-125胺基化后N元素含量高达2.04%，二（4-羟基-2-三氟甲基）苯基二硫代次膦酸改性的树脂D-70-T-125-DTPA(100%)中S含量高达3.43%。
（3）利用胺基化前后两种磁性丙烯酸树脂D-70-T-125和D-70-T-125-A以及不包含二乙烯苯为原料的磁性树脂E-70-T-125-A和不包含甲基丙烯酸缩水甘油酯为原料的磁性树脂D-100-T-125分别对2-硝基甲苯(o-MNT)、2,4-二硝基甲苯(DNT)和2,4,6-三甲基甲苯(TNT)三种硝基苯类吸附质进行吸附性能测试。研究发现胺基化后树脂D-70-T-125-A对TNT的吸附量可达314mg/g，对DNT的吸附量仅为81mg/g。研究发现，树脂D-100-T-125和D-70-T-125对吸附质TNT的吸附符合物理吸附中的单分子层吸附特征。上述四种树脂对DNT和o-MNT的吸附均属于物理吸附中的单分子层吸附范畴。树脂的吸附量与其比表面积和孔道结构正相关。
amoisonic（4）考察二硫代次膦酸改性过的磁性丙烯酸树脂D-70-T-125-DTP(100%)对三价镧系元素Eu3+和Nd3+的吸附性能。研究发现，改性树脂在30min内均能达到吸附平衡，并在pH=6时具有最佳吸附性能。
关键词：磁性丙烯酸树脂、吸附性能、硝基苯类吸附质、Eu3+和Nd3+
Abstract
Currently,water-related problems resulted from economic development have been emerging one after another.Adsorptive resins have showed advantages that other resins can hardly match.As a typical adsorptive resin,magnetic acrylic resin is gaining growing popularity in water treatment for its
good mechanical property,high adsorption rete,good separation capability,and easy operation.Acrylic resins can be functionalized with different groups and can be modified under specific conditions by adding modifying materials,so as to improve its performance for various applications.
The main points of this thesis can be classified as follows:
(1)Magnetic acrylic resins were successfully synthesized via suspension polymerization.Adjusting the monomer ratio,porogen content,and the types of porogen,we can obtaine the resin with best performance;Marked as D-70-T-125,it has good magnetic separation ability and a surface area of549m2/g.The particle size is distributed in100~250μm.This study also found that the content of divinylbenzene and the specific surface area of the resin show a linear correlation;the coefficient is 0.998.
(2)The magnetic acrylic resin with best performance,D-70-T-125,was selected and modified with trimethylamine and di(4-hydroxy-2-trifluoromethyl)phenyl dithiophosphinic acid respectively.It was found that the specific surface area of the aminated resin reduced by270m2/g and the specific saturation magnetization was reduced by0.7emu/g.The specific surface area of the resin modified with bis(4-hydroxy-2-trifluoromethyl)phenyl dithiophosphinic acid reduced by380m2/g, indicating its v
olume of pore was reduced accordingly.the degree of the two modified resin was determined using XPS,it was found that the content of N of D-70-T-125 was as high as2.04%,and The content of the resin D-70-T-125-DTPA(100%)which modified by bis(4-hydroxy-2-trifluoromethyl)phenyl dithiophosphinic acid,S is as high as3.43%.
(3)Using two kinds of magnetic acrylic resins D-70-T-125and D-70-T-125-A, the magnetic resin E-70-T-125-A which does not contain divinylbenzene,and the magnetic resin D-100-T-125whichdoes not contain Glycidyl methacrylate,Above four resins is2-nitrotoluene(o-MNT),2,4-dinitrotoluene(DNT)and 2,4,6-trimethyltoluene(TNT)respectively.Three nitrobenzene adsorbates were tested
