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林产化学与工业 ›› 2001, Vol. 21 ›› Issue (2): 9-15.

• 研究报告 • 上一篇    下一篇

丙烯腈/木粉接枝共聚物的合成及其水解物的吸附特性研究

王格慧1, 宋湛谦2, 王连生1   

  1. 1. 南京大学环境学院污染控制与资源化国家重点实验室, 江苏 南京 210093;2. 中国林业科学研究院林产化学工业研究所, 江苏 南京 210042
  • 收稿日期:2000-11-16 修回日期:1900-01-01 出版日期:2001-06-30 发布日期:2001-06-30

STUDY ON THE PREPARATION OF GRAFTED COPOLYMER OF ACRYLONITRILE/WOOD POWDER AND ADSORPTION PROPERTIES OF ITS HYDROLYSATE

WANG Ge-hui1, SONG Zhan-qian2, WANG Lian-sheng1   

  1. 1. Department of Environmental Science, State Key Laboratory of Pollution Control and Resources Reuse, Nanjing University, Nanjing 210093, China;2. Institute of Chemical Industry of Forest Product, CAF, Nanjing 210042, China
  • Received:2000-11-16 Revised:1900-01-01 Online:2001-06-30 Published:2001-06-30

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摘要： 以Fe2+/H2O2作为引发剂,将丙烯腈和木粉进行接枝共聚,得到丙烯腈/木粉接枝共聚物(PANW),再经适度水解的方法合成阳离子交换树脂--羧基木粉。研究影响接枝共聚反应的各种因素和水解条件,并讨论羧基木粉对重金属离子和阳离子型染料的吸附特性。实验结果表明:(1)在适量引发剂(FeSO4·7H2O=1g)和适当温度(60℃)作用下,可得到较高接枝增量和接枝率的PANW;(2)在PANW的水解反应中,在碱性催化剂作用下,可得到羧基含量高的产物,但收率较低;而在酸性催化剂作用下,则得到羧基含量低的产物,但收率较高;(3)羧基木粉对阳离子型染料--碱性桃红的吸附容量与起始浓度有关,本实验中,羧基木粉对碱性桃红的吸附容量最高可达500mg/g,对Cu2+的吸附容量最高可达39mg/g;(4)经0.3mol/L HCl再生4次后,羧基木粉对碱性桃红的吸附容量保持在440mg/g以上,在含有多种金属离子的溶液中,羧基木粉优先吸附Fe3+等硬酸型离子。

关键词: 丙烯腈, 木粉, 接枝共聚, 离子交换

Abstract: In this study,carboxylic wood powder,a cationic exchanging resin,was prepared from hydrolysis of the grafted copolymer(PANW),which was prepared by reacting acrylonitrile with wood powder.Experiments on graft copolymerization and acid/alkaline hydrolysis of PANW were carried out to study the effects of dosage,temperature and time on the yield and properties of the products. Results show that acid value of carboxylic wood powder from alkaline hydrolysis is higher,but its yield is lower than that from acid hydrolysis. The adsorption capacity of carboxylic wood powder for basic pink dye increased with increase of the initial concentration of the adsorbate,and could be kept over 500mg/g after repeated use and regeneration for 4 times.

Key words: acrylonitrile, wood powder, graft copolymerization, ion exchange

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