摘要
文中聚焦温敏聚合物的响应机理,通过单电子转移活性自由基聚合法(SET-LRP),以溴化亚铜/三-(2-二甲氨基乙基)胺(CuBr/Me_(6)TREN)原位歧化得到的初生零价铜(Cu^(0))及二价铜与混合配体的络合物(Cu^(Ⅱ)Br_(2)/Me_(6)TREN/PMDETA)为催化体系,实现了温敏单体N-异丙基丙烯酰胺(NIPAM)和甜菜碱两性离子功能单体[2-(甲基丙烯酰基氧基)乙基]二甲基-(3-磺酸丙基)氢氧化铵(DMMPPS)的原位链延伸,制备得到了系列不同嵌段比的温敏聚合物P(NIPAM-b-DMMPPS)。采用核磁共振氢谱和红外光谱对聚合物结构进行了表征。以NIPAM加料比例为40%合成的P(NIPAM-b-DMMPPS)具有最低临界溶解温度(LCST)和最高临界溶解温度(UCST),分别为41℃和25℃。考察了NaCl浓度对P(NIPAMb-DMMPPS)LCST的影响,随着NaCl浓度的增大,LCST略降低。表面张力测试结果表明,表面活性聚合物溶液浓度为1×10^(-2)g/L时,表面张力降低至45 m N/m。P(NIPAM-b-DMMPPS)在石蜡/水体系中表现出温度诱导的乳化-破乳行为,P(NIPAM-b-DMMPPS)吸附在油水界面形成乳液,提高P(NIPAM-b-DMMPPS)中PNIPAM嵌段的比例能够实现从“低温乳化、高温破乳”向“高温乳化、低温破乳”的转变,其在油水乳化破乳领域有良好的应用前景。
Focused on the response mechanism of temperature-sensitive polymers,the Cu^(0) obtained through in situ disproportionation of cuprous bromide/tris-(2-dimethylaminoethyl)amine(CuBr/Me_(6)TREN)and a complex of divalent copper with mixed ligands(Cu^(Ⅱ)Br_(2)/Me_(6)TREN/PMDETA)were catalyzed by single electron transfer reactive radical polymerization(SET-LRP),which were used as catalytic.The in situ chain extension of the temperature-sensitive monomer N-isopropylacrylamide(NIPAM)and the betaine amphiphilic functional monomer[2-(methacryloyloxy)ethyl]dimethyl-(3-sulphonatopropyl)ammonium hydroxide(DMMPPS)has been realized,and a series of temperature-sensitive polymers with different block ratios of P(NIPAM-b-DMMPPS)have been prepared.The polymer structures were characterized by 1H-NMR and FT-IR.P(NIPAM-b-DMMPPS)synthesized with a NIPAM addition ratio of 40%has a minimum critical dissolution temperature(LCST)and a maximum critical dissolution temperature(UCST)of 41℃ and 25℃,respectively.The effect of NaCl concentration on the LCST of P(NIPAM-b-DMMPPS)was examined,and the LCST decreases slightly with increasing NaCl concentration.The results of surface tension measurements show that a surface-active polymer solution concentration of 1×10^(-2) g/L reduces the surface tension to 45 mN/m.P(NIPAM-b-DMMPPS)exhibits temperatureinduced emulsification and demulsification behaviors in the paraffin/water system,and P(NIPAM-b-DMMPPS)adsorbs at the oil-water interface to form an emulsion,improving the efficiency of P(NIPAM-b-DMMPPS)can realize the transition from"low-temperature emulsification and high-temperature demulsification"to"hightemperature emulsification and low-temperature demulsification",showing a good application prospect in the field of oil-water emulsification and demulsification.
作者
邹一梅
王玲
刘向斌
王俊
丁伟
苏馨怡
刘潞敏
杨二龙
Yimei Zou;Ling Wang;Xiangbin Liu;Jun Wang;Wei Ding;Xinyi Su;Lumin Liu;Erlong Yang(Provincial Key Laboratory of Oil&Gas Chemical Technology,Chemistry and Chemical Engineering College of Northeast Petroleum University,Daqing 163318,China;Oil Production Technology Research Institute,Daqing Oilfield Co.,LTD.,Daqing 163000,China;Key Laboratory of Enhanced Oil and Gas Recovery of Ministry of Education of China,Northeast Petroleum University,Daqing 163318,China)
出处
《高分子材料科学与工程》
北大核心
2025年第7期25-35,共11页
Polymer Materials Science & Engineering
基金
中国石油科技创新基金研究项目(2024DQ02-0120)
国家自然科学基金面上项目(52274037)
国家自然科学基金重点项目(51834005)
黑龙江省重点研发计划项目(2023ZX04A03)。
关键词
单电子转移活性自由基聚合
混合配体
温度诱导
表面活性聚合物
single electron transfer active radical polymerization
mixed ligands
temperature induced
surface active polymer
作者简介
通讯联系人:王玲,主要从事高分子化学-活性自由基聚合研究,E-mail:wlnepu@163.com;通讯联系人:刘向斌,主要从事三次采油理论与技术、储层动态评价研究,E-mail:liuxiangbin@petrochina.com.cn。
