期刊文献+

CO2调控的温敏性聚合物的制备及其响应行为

Preparation and CO2 Regulated-phase Transition Behavior of Temperature Sensitive Polymers
下载PDF
导出
摘要 通过原子转移自由基聚合制备了含甲氧基聚乙二醇(mPEG)、N-异丙基丙烯酰胺(PNIPAM)和2-(二乙基氨基)甲基丙烯酸乙酯(PDMAEMA)的三嵌段共聚物。该共聚物具有较为明显的温度响应特征,并且温敏性的范围可以通过CO2进行调控。该三嵌段聚合物在水溶液中存在最低临界溶液温度(LCST),且该聚合物水溶液在CO2调节的LCST下具有各种聚集状态。随着温度的升高,三嵌段聚合物表现出双重LCST行为,并最终导致PNIPAM嵌段和PDMAEMA嵌段分别在各自相转变温度下收缩,聚合物的疏水性增强,出现收缩-收缩-聚集的三相变过程。CO2通过调控PDMAEMA嵌段中的叔胺基团电性,可以使聚合物的亲水性增强,使得三嵌段聚合物在较高温度下难以聚集,实现了CO2对聚合物相转变温度的调控。 Temperature-sensitive polymers can exhibit different characteristics under different temperature stimuli.In this paper,triblock copolymers containing methoxypolyethylene glycol(mPEG),N-isopropylacrylamide(PNIPAM)and 2-(diethylamino)ethyl methacrylate(PDMAEMA)were prepared by atom transfer radical polymerization(ATRP)method.Because PNIPAM and PDMAEMA have good temperature response characteristics,the copolymer has obvious temperature response characteristics,and the range of temperature sensitivity can be adjusted by CO2.Through the study of the CO2 and temperature response behavior of the triblock polymer in the aqueous solution,the lowest critical solution temperature(LCST)of the triblock polymer was found.Moreover,the polymer aqueous solution has various aggregation states under CO2 adjusted LCST.As the temperature increases,the triblock polymer exhibits a double LCST behavior,and eventually causes the PNIPAM block and the PDMAEMA block to shrink at their respective phase transition temperatures,and the hydrophobicity of the polymer increases.A three-phase contraction-contraction-aggregation process has occurred.CO2 can increase the hydrophilicity of the polymer by regulating the change in the chargeability of the tertiary amine group in the PDMAEMA block,making it difficult for the triblock polymer to aggregate at higher temperatures.The regulation of CO2 on the phase transition temperature of the polymer is realized.
作者 张文鹏 陶敏敏 刘东芳 吴洋 鲁红升 ZHANG Wen-peng;TAO Min-min;LIU Dong-fang;WU Yang;LU Hong-sheng(Engineering Technology Branch, CNOOC Energy Development Co., Ltd., Tianjin 300456, China;College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China;College of Science, Xihua University, Chengdu 610039, China)
出处 《合成化学》 CAS 北大核心 2020年第8期701-707,共7页 Chinese Journal of Synthetic Chemistry
基金 高分子材料国家重点实验室开放基金资助项目(KF201305) 四川省教育厅创新团队项目(13TD0025)。
关键词 嵌段共聚物 温敏 CO2 调控 可逆 制备 响应行为 triblock copolymer temperature sensitive CO2 regulation reversible preparation response behavior
  • 相关文献

参考文献4

二级参考文献34

共引文献3

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部