CO_(2)响应性双丙酮丙烯酰胺-co-乙烯胺温敏共聚物的制备及其相变行为  

Synthesis and phase transition behaviors of temperature-sensitive poly(diacetone acrylamide-co-vinylamine) with CO_(2) responsiveness

作　　者：王毓 任俊鹏 赵君 周进康 WANG Yu;REN Junpeng;ZHAO Jun;ZHOU Jinkang(School of Chemistry and Materials Science,Guizhou Education University,Guiyang 550018,Guizhou,China)

机构地区：[1]贵州师范学院化学与材料学院,贵州贵阳550018

出　　处：《精细化工》2021年第6期1130-1134,1140,共6页Fine Chemicals

基　　金：国家自然科学基金项目(21464005);贵州省自然科学基金项目(黔科合基础[2018]1122,[2019]1252);贵州省教育厅青年科技人才基金项目(黔教合KY字[2018]263)。

摘　　要：以双丙酮丙烯酰胺(DAAM)和N-乙烯基甲酰胺(NVF)为主要原料,过硫酸铵和亚硫酸氢钠为引发剂,通过水溶液自由基聚合反应制备了无规共聚物P(DAAM-co-NVF),并在碱性条件下水解得到共聚物P(DAAMco-VAm)。采用FTIR、^(1)HNMR、GPC和TGA对共聚物进行了表征,同时以UV-Vis和DSC对P(DAAM-co-NVF)和P(DAAM-co-VAm)水溶液的相转变行为进行研究。结果表明,共聚物P(DAAM-co-NVF)和P(DAAM-co-VAm)具有可调控的低临界溶解温度(LCST),通过改变共聚物组成和溶液质量分数可以调控P(DAAM-co-NVF)和P(DAAM-co-VAm)的LCST;在P(DAAM-co-VAm)水溶液中通入CO_(2)可以调控聚合物的LCST;P(DAAM-co-VAm)水溶液的LCST具有可逆的CO_(2)/N_(2)开关响应性。Random copolymer poly(diacetone acrylamide-co-N-vinylformamide) [P(DAAM-co-NVF)] was synthesized by free radical polymerization in aqueous solution using diacetone acrylamide(DAAM) and N-vinylformamide(NVF) as monomers, ammonium persulfate and sodium hydrogen sulfite as initiator. Poly(diacetone acrylamide-co-vinylamine) [P(DAAM-co-VAm)] was obtained by hydrolysis of P(DAAMco-NVF) under alkaline conditions. The resultant copolymers were characterized by FTIR, ^(1)HNMR, GPC and TGA. The phase transition behaviors of P(DAAM-co-NVF) and P(DAAM-co-VAm) were evaluated by UV-Vis spectroscopy and DSC. The results showed that copolymers P(DAAM-co-NVF) and P(DAAM-coVAm) solutions had regulatory lower critical solution temperature(LCST), which was controlled by changing copolymer composition and solution mass fraction. Moreover, the LCST of P(DAAM-co-VAm) aqueous solution could be regulated by bubbling CO_(2) into the system. The LCST of P(DAAM-co-VAm) aqueous solution had reversible response to CO_(2) and N_(2) switching.

关 键 词：双丙酮丙烯酰胺 N-乙烯基甲酰胺 温敏性 CO_(2)响应性 LCST可调控性 功能材料 

分 类 号：TQ423.92[化学工程]