| 疏水改性无规共聚物水凝胶体积相变研究 |
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| 引用本文： | 谭帼馨,王迎军,关燕霞. 疏水改性无规共聚物水凝胶体积相变研究[J]. 离子交换与吸附, 2006, 22(6): 559-564 |
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| 作者姓名： | 谭帼馨 王迎军 关燕霞 |
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| 作者单位： | 广东工业大学轻工化工学院,广州,510006;华南理工大学材料学院,广州,510641;华南理工大学材料学院,广州,510641;广东工业大学轻工化工学院,广州,510006 |
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| 基金项目： | 广东省自然科学基金(0630082)，广东工业大学博士启动基金资助项目 |
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| 摘 要： | 以偶氮二异丁腈(AIBN)为引发剂,合成了一系列疏水改性的甲基丙烯酸β-羟乙酯(HEMA)无规共聚物水凝胶,研究了离子强度、pH、温度等条件对凝胶体积相变的影响。结果表明,疏水基末端端基的疏水程度决定凝胶体积相变的速率,随着疏水性单体甲基丙烯酸酯烷基链的增长,凝胶的疏水性增强,凝胶的相转变pH向低pH处迁移;温度高于LCST时,分子间的氢键作用减弱,疏水基团间的相互作用加强,凝胶发生体积相变。
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| 关 键 词： | 水凝胶 疏水性 体积相变 |
| 文章编号： | 1001-5493(2006)06-0559-06 |
| 收稿时间： | 2006-01-05 |
| 修稿时间： | 2006-01-05 |
STUDY OF VOLUME PHASE TRANSITION OF HYDROPHOBICALLY MODIFIED HYDROGELS |
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| TAN Guoxin,WANG Yingjun,GUAN Yanxia. STUDY OF VOLUME PHASE TRANSITION OF HYDROPHOBICALLY MODIFIED HYDROGELS[J]. Ion Exchange and Adsorption, 2006, 22(6): 559-564 |
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| Authors: | TAN Guoxin WANG Yingjun GUAN Yanxia |
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| Affiliation: | 1. College of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, Guangdong, 510006, China 2. College of Material Science and Engineering, South China University of Technology, Guangzhou, Guangdong, 510640, China |
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| Abstract: | Hydrogel materials are synthesized by radical copolymerization of 2-hydroxyethyl methacrylate(HEMA),N-vinylpyrrolidone(NVP)and n-butylmethacrylate(BMA)/ethylmethacrylate(EMA),with azobisisobutyronitrile(AIBN)as an initiator.The impact of temperature,pH and ionic strength on the volume phase transition of the hydrogels is studied.The result shows that the volume phase transition temperature of ionizable and thermosenstive copolymer hydrogels depend upon the hydrophilic/hydrophobic character of the comonomers.With the chain length of the hydrophobic monomer increasing,the volume phase transition pH value remove to low pH value. |
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| Keywords: | Hydrogels Hydrophobicity Volume phase transition. |
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