基于绿色化学理念的自由基聚合制备聚丙烯酸实验新探索

引用本文: 赵子健, 史延新, 李世成, 阮文红, 朱芳, 江继军. 基于绿色化学理念的自由基聚合制备聚丙烯酸实验新探索[J]. 大学化学, 2024, 39(5): 315-324. doi: 10.3866/PKU.DXHX202311094 shu

Citation: Zijian Zhao, Yanxin Shi, Shicheng Li, Wenhong Ruan, Fang Zhu, Jijun Jiang. A New Exploration of the Preparation of Polyacrylic Acid by Free Radical Polymerization Based on the Concept of Green Chemistry[J]. University Chemistry, 2024, 39(5): 315-324. doi: 10.3866/PKU.DXHX202311094 shu

基于绿色化学理念的自由基聚合制备聚丙烯酸实验新探索

中山大学化学学院, 广州 510006
基金项目:
广东省高等教育教学改革项目；广东省研究生教育创新计划项目；中山大学本科教学质量工程项目

摘要: 自由基聚合制备聚丙烯酸实验是高分子化学实验课程中重要且经典的教学内容，其单体易得、反应条件温和，作为掌握自由基聚合反应和多孔吸附材料制备的代表性实验，多个高等院校均有开设。但现有教材中聚丙烯酸的制备实验存在反应体系易凝胶化、产生废液多，流程耗时30.5–33 h，无法在一个教学段内完成，表征过程较繁复等问题。为此，本改进实验采用天然且廉价易得的海藻酸钠作为增稠剂，稳定反应体系粘度，防止因局部粘度剧增引起的反应体系凝胶化；采用同样天然且廉价易得的多孔硅藻土作填充剂，与自由基聚合反应制得的聚丙烯酸溶液共沉淀制备多孔树脂，大幅减少有机溶剂的使用和消耗。此外，本改进实验紧跟学术前沿，引入智能手机识别-比色分析法表征产物的吸附性能，表征手段快速便捷。新的致孔方式和表征手段使实验时长缩减至5 h内，保证了教学的连贯性，同时保留原实验特色，使得该实验更具有教学意义，有利于激发学生对本实验课程的学习兴趣。

关键词:

English

A New Exploration of the Preparation of Polyacrylic Acid by Free Radical Polymerization Based on the Concept of Green Chemistry

School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China
Received Date: 29 November 2023
Revised Date: 15 January 2024

Abstract: The experimental preparation of polyacrylic acid by free radical polymerization is an important and classic teaching content in the course of Polymer Chemistry Experiments. The monomer is easy to obtain and the reaction conditions are mild. As a representative experiment to master the free radical polymerization reaction and the preparation of porous adsorption materials, it is offered in many colleges and universities. However, in the preparation experiments of polyacrylic acid in existing textbooks, the reaction system is easy to gelate and produces more waste liquid. The process took 30.5 to 33 hours and could not be completed within one teaching session. The characterization process is complicated. Therefore, natural and cheap sodium alginate was used as thickener in this improved experiment to stabilize the viscosity of the reaction system and prevent the gelation of the reaction system caused by the sharp increase of local viscosity. Using the same natural and cheap porous diatomite as filler, the porous resin was prepared by co-precipitation with the polyacrylic acid solution prepared by free radical polymerization reaction, which greatly reduced the use and consumption of organic solvents. In addition, this improved experiment follows the academic frontier, and introduces the smartphone identification-colorimetric analysis to characterize the adsorption performance of the product, which is fast and convenient. The new method of hole formation and representation reduced the duration of the experiment to 5 hours, ensuring the continuity of teaching, while retaining the characteristics of the original experiment, making the experiment more meaningful and conducive to stimulate students’ interest in learning this experimental course.

Key words:

Free radical polymerization
/ Polyacrylic acid
/ Green chemistry
/ Duration of experiment
/ martphone identification-colorimetric analysis

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沈阳化工大学材料科学与工程学院沈阳 110142

基于绿色化学理念的自由基聚合制备聚丙烯酸实验新探索

English

A New Exploration of the Preparation of Polyacrylic Acid by Free Radical Polymerization Based on the Concept of Green Chemistry

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

基于绿色化学理念的自由基聚合制备聚丙烯酸实验新探索

English

A New Exploration of the Preparation of Polyacrylic Acid by Free Radical Polymerization Based on the Concept of Green Chemistry

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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