物理化学学报 >> 2010, Vol. 26 >> Issue (08): 2189-2194.doi: 10.3866/PKU.WHXB20100819

胶体及界面化学 上一篇    下一篇

P(DEAM-co-NAS)的合成及其温敏性的环境效应

张飒, 刘守信, 韩晓宇, 党莉, 齐晓君, 杨曦   

  1. 应用表面与胶体化学教育部重点实验室, 陕西师范大学化学与材料科学学院, 西安 710062
  • 收稿日期:2010-03-02 修回日期:2010-04-12 发布日期:2010-07-23
  • 通讯作者: 刘守信 E-mail:liushx@snnu.edu.cn
  • 基金资助:

    国家自然科学基金(20973106)资助项目

Synthesis of P(DEAM-co-NAS) and the Environmental Effects of Its Temperature Sensitivity

ZHANG Sa, LIU Shou-Xin, HAN Xiao-Yu, DANG Li, QI Xiao-Jun, YANG Xi   

  1. Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Materials Science, Shaanxi Normal University, Xi'an 710062, P. R. China
  • Received:2010-03-02 Revised:2010-04-12 Published:2010-07-23
  • Contact: LIU Shou-Xin E-mail:liushx@snnu.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20973106).

摘要:

采用自由基溶液聚合法合成聚(N,N-二乙基丙烯酰胺-co-N-丙烯酸琥珀酰亚胺) (P(DEAM-co-NAS))共聚比为7.9∶1、3.5∶1、2.5∶1、2∶1、1.5∶1的五组共聚物. 利用傅里叶变换红外(FTIR)光谱和核磁共振(1H NMR)谱对P(DEAM-co-NAS)结构进行表征. 共聚物组成和介质性质对P(DEAM-co-NAS)水溶液温敏性有显著影响. 结果表明: 随着NAS含量增加, 共聚物水溶液的低临界溶解温度(LCST)逐渐升高, 温敏性降低; 盐的引入使P(DEAM-co-NAS)水溶液的LCST降低, 所引入盐的阴离子价数越高, 影响程度越大; 有机酸的引入使P(DEAM-co-NAS)水溶液的LCST降低; NaOH、乙二胺、丁二胺的引入使P(DEAM-co-NAS)水溶液的LCST升高, 二胺对P(DEAM-co-NAS)水溶液温敏性影响程度要大于NaOH.

关键词: 温敏性, 聚(N,N-二乙基丙烯酰胺-co-N-丙烯酸琥珀酰亚胺), 低临界溶解温度, 介质, 环境效应

Abstract:

Poly(N,N-diethylacrylamide-co-N-acryloxysuccinimide) (P(DEAM-co-NAS)) was synthesized by free radical solution polymerization and copolymerization ratios of 7.9∶1, 3.5∶1, 2.5∶1, 2∶1, 1.5∶1 were used. The copolymer structures were characterized by Fourier transform infrared (FTIR) spectrometry and nuclear magnetic resonance (1H NMR). The copolymer compositions and the properties of the medium environment largely influence the temperature sensitivities of the P(DEAM-co-NAS) aqueous solutions. The lower critical solution temperature (LCST) of the P(DEAM-co-NAS) aqueous solution increased with an increase in the NAS content. The addition of salts resulted in a linear decrease in the LCST of the P(DEAM-co-NAS) aqueous solution and this depended on the anion valence of the salts. The addition of organic acids can reduce the LCST of the P(DEAM-co-NAS) aqueous solution. Moreover, the addition of NaOH, ethylenediamine, and putrescine leads to an increase in the LCST of the P(DEAM-co-NAS) aqueous solution. The effects of ethylenediamine and putrescine on the LCST of the P(DEAM-co-NAS) aqueous solution were greater than that of NaOH.

Key words: Temperature sensitivity, Poly(N,N-diethylacrylamide-co-N-acryloxysuccinimide), Lower critical solution temperature, Medium, Environmental effect

MSC2000: 

  • O648