全文下载：2013020176
王纪增1， 赵华宁1， 程廓2， 王庆国1*
（1. 青岛科技大学 橡塑材料与工程教育部重点实验室, 山东 青岛 266042；
2.江苏达胜热缩材料有限公司，江苏 吴江 215214）
摘要： 应用电子束辐射交联技术制备了聚乙烯醇接枝丙烯酸（PVA-g-AAc）水凝胶。研究了pH值、AAc单体用量和辐照剂量等因素对PVA-g-AAc水凝胶溶胀率的影响。实验结果表明，在1697 cm-1处，PVA-g-AAc水凝胶的红外光谱图上出现强烈的羰基的CO特征峰，表明AAc成功接枝到PVA分子上；PVA-g-AAc水凝胶的溶胀率随PVA/AAc/H2O中AAc的质量分数和浸泡时间增加而增大；在pH=9.2时，PVA-g-AAc水凝胶具有显著的pH敏感性；辐射剂量为15 kGy时，由PVA/AAc/H2O（1/1/20，质量比）混合溶液制备的PVA-g-AAc水凝胶具有较高的溶胀率；辐射剂量为5 kGy时，由PVA/AAc/H2O（1/5/20，质量比）混合溶液制备的PVA-g-AAc水凝胶具有较高的溶胀率。
关键词： 水凝胶； 电子束辐射； 聚乙烯醇； pH敏感
中图分类号： TQ 311 文献标志码： A
Preparation and Properties of pH-Sensitive Polyvinyl AlcoholHydrogels Irradiated with Electron Beam
WANG Ji-zeng1, ZHAO Hua-ning1, CHENG Kuo2, WANG Qing-guo1
(1.Key Laboratory of Rubber-plastics，Education Ministry, Qingdao University of Science and Technology, Qingdao 266042，China;
(2.Jiang Su Dasheng Heat-shrinkable Material Co.,Ltd.,Wujiang 215214，China)
Abstract:pH-Sensitive PVA（polyvinyl alcohol）-g-AAc hydrogel have been prepared using the electron beam irradiation technology. The effects of pH value, the content of AAc monomer and irradiation dose on the equilibrated swelling ratio of the hydrogel were studied. FT-IR spectrum of the PVA-g-AAc hydrogel shows a new absorbance peak at 1697 cm-1, associated with the group of CO bond indicating the AAc was successfully grafted onto the PVA macromolecular. The swelling ratio of PVA-g-AAc hydrogel increases with the weight ratio of the AAc increasing, while the swelling ratio of PVA-g-AAc hydrogel changes dramatically at the pH value of 9.2. The PVA-g-AAc hydrogel prepared by PVA/AAc/H2O (1/1/20, weight ratio) has a higher swelling ratio with the radiation dose of 15 kGy; the PVA-g-AAc hydrogel prepared by PVA/AAc/H2O (1/5/20, weight ratio) has a higher swelling ratio with the radiation dose of 5 kGy.
Key words: hyrogel; electron beam radiation; polyvinyl alcohol; pH-sensitive
收稿日期：2012-03-30
基金项目： 国家自然科学基金项目（50873049）.
作者简介： 王纪增（1987—）,男,硕士研究生.*通信联系人.
