光-碱双重可降解阳离子表面活性剂的合成与性能  

Synthesis and properties of a photo-base double degradable cationic surfactant

作　　者：陈荣健 胡仲禹 王丽娟 李秦盛 唐艺窈 程传杰 CHEN Rong-jian;HU Zhong-yu;WANG Li-juan;LI Qin-sheng;TANG Yi-yao;CHENG Chuan-jie(School of Chemistry and Chemical Engineering,Jiangxi Science&Technology Normal University, Fenglin Street,Nanchang 330013,China)

机构地区：[1]江西科技师范大学化学化工学院,江西南昌330013

出　　处：《化学研究与应用》2022年第2期262-267,共6页Chemical Research and Application

基　　金：国家自然科学基金项目(21564004)资助;江西科技师范大学本科生创新科研基金项目资助。

摘　　要：以香草醛、溴代十二烷、硝酸等为原料,通过O-烷基化、硝化、还原、酯化、成盐五步反应,合成了一种含邻硝基苄酯的可光-碱双重降解的吡啶盐阳离子表面活性剂。中间体与目标产物都进行了^(1)H NMR结构表征;所得阳离子表面活性剂的临界胶束浓度(CMC)值约为0.3 mmol·L^(-1)。以该表面活性剂为乳化剂,进行苯乙烯乳液聚合可以得到稳定的乳液,表明该表面活性剂具有良好的乳化性能。将乳液进行紫外光照2 h,可明显观察到乳液破乳并变色。经光降解测试证实该表面活性剂可在光作用下降解;发泡测试表明该表面活性剂具备一定的发泡性能;pH降解测试表明表面活性剂可在pH为7~9下实现碱降解。A photo-base double degradable cationic pyridine surfactant containing o-nitrobenzyl ester was synthesized by O-alkyl,nitration,reduction,esterification,and salt-forming reaction,respectively,using vanillin,1-bromo dodecane and nitric acid as main reactants.The intermediates and target surfactant were characterized by ^(1)H-NMR.The critical micelle concentration(CMC)was determined to be 0.3 mmol·L^(-1).Stable polystyrene latex was obtained by styrene emulsion polymerization using the new surfactant as an emulsifier,indicating that the surfactant had good emulsification ability.The emulsion was irradiated by UV light for 2 h,and demulsification was observed obviously.The photo-degradation test confirmed that the new surfactantcan achieve photo-degradation under UV light.Foaming test showed that the new surfactant had certain foam-forming property.The pH degradation test showed that the surfactant could also degrade under alkali conditions of pH 7~9.

关 键 词：表面活性剂 光降解 香草醛 邻硝基苄酯 乳液 

分 类 号：O647.2[理学—物理化学]