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第 35 卷第 7 期 精 细 化 工 Vol.35, No.7
201 8 年 7 月 FINE CHEMICALS July 2018

水处理技术与环境保护
核桃壳接枝聚合物的制备及其吸附性能

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叶庆龄 ，陈潇琪 ，妥小军 ，常 玥 1,2,3* ，査 飞
（1. 西北师范大学 化学化工学院,甘肃 兰州 730070；2. 生态环境相关高分子材料教育部重点实验室，
甘肃 兰州 730070；3. 甘肃省高分子材料重点实验室，甘肃 兰州 730070）

摘要：以核桃壳、2-溴异丁酰溴制备的核桃壳大分子化合物为引发剂，FeCl 3 ·6H 2 O/PPh 3 、V C 为催化体系，采用
电子活化再生原子转移自由基聚合（AGET ATRP）法制备了核桃壳接枝聚丙烯酰胺（核桃壳-g-PAM）、聚甲基
丙烯酸甲酯（核桃壳-g-PMMA）两种复合材料。利用红外光谱、差热分析及扫描电镜对复合材料的结构和形貌
进行了表征。结果表明：两种复合材料对水中 Pb（Ⅱ）、Cu（Ⅱ）的吸附量均高于核桃壳。293 K 时，10 mg 核
桃壳-g-PAM、核桃壳-g-PMMA 对 pH=5、50 mg/L Pb（Ⅱ）的吸附量分别为 40.5、53.7 mg/g，吸附机理均符合
拟二级动力学模型，等温吸附过程可用 Langmuir 方程较好地描述。核桃壳-g-PAM、核桃壳-g-PMMA 再生 4 次
对 Pb（Ⅱ）的最低解吸率分别为 93.4%、93.1%，表明核桃壳复合材料具有较好的再生能力。
关键词：核桃壳；原子转移自由基聚合；复合材料；吸附；水处理技术
中图分类号：TQ085.412 文献标识码：A 文章编号：1003-5214 (2018) 07-1221-06

Preparation and Adsorption Property of Walnut Shell Grafted Polymer

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YE Qing-ling , CHEN Xiao-qi , TUO Xiao-jun , CHANG Yue 1,2,3* , ZHA Fei
（1. College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou 730070, Gansu, China;
2. Key Laboratory of Eco-Environment-Related Polymer Materials Ministry of Education, Lanzhou 730070, Gansu,
China; 3. Key Laboratory of Polymer Materials of Gansu Province, Lanzhou 730070, Gansu, China）
Abstract: Two composite materials, walnut shell grafted polyacrylamide and walnut shell grafted
poly(methyl methacrylate) were prepared via activators generated by electron transfer for atom transfer
radical polymerization (AGET ATRP) by using walnut shell macroinitiator as initiator in a catalytic system
of FeCl 3·6H 2O/PPh 3 and Vc, in which walnut shell macroinitiator was prepared with walnut shell and
2-bromoisobutyryl bromide. The structure and morphology of composite materials were characterized by
FTIR, TG and SEM. The results indicated that the adsorption capability of Pb(Ⅱ) and Cu(Ⅱ) from aqueous
solution by both walnut shell grafted polyacrylamide and walnut shell grafted poly(methyl methacrylate)
was higher than that of walnut shell. The maximum adsorption capacity was 40.5 mg/g and 48.5 mg/g,
respectively, at 293 K and pH 5 when initial Pb(Ⅱ) concentration was 50 mg/L. Kinetic and isotherm
studies of Pb(II) revealed that adsorption process followed the pseudo-second-order kinetic model and the
Langmuir isotherm equation. After 4 times of regeneration, the minimum desorption rate of Pb (Ⅱ) by
walnut shell grafted polyacrylamide and walnut shell grafted poly(methyl methacrylate) was 93.4% and
93.1%, respectively, indicating that the composite materials had better regeneration capacity.
Key words: walnut shell; atom transfer radical polymerization; composite materials; adsorption; water
treatment
Foundation item: National Natural Science Foundation of China (21161017)

收稿日期：2017-08-04; 定用日期：2017-11-27; DOI: 10.13550/j.jxhg.20170631
基金项目：国家自然科学基金项目（21161017）
作者简介：叶庆龄（1993—），女，硕士生。联系人：常 玥（1970—），女，教授，博士，E-mail：cy70@sina.com。