SiO2纳米颗粒与十六烷基二甲基乙基溴化铵协同构建CO2/水乳液及其表征  

Stabilization and characterization of CO2/water emulsions synergistically constructed with silica nanoparticles and hexadecyl dimethyl ethyl ammonium bromide

作　　者：朱梦雅 胡冬冬[1] 包磊 赵玲[1] 刘涛[1] Zhu Mengya;Hu Dongdong;Bao Lei;Zhao Ling;Liu Tao(State Key Laboratory of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学化学工程联合国家重点实验室

出　　处：《石油化工》2019年第8期826-831,共6页Petrochemical Technology

基　　金：国家自然科学基金项目（21676081）

摘　　要：利用SiO2纳米颗粒与阳离子表面活性剂十六烷基二甲基乙基溴化铵(EHDAB)协同构建CO2/水乳液,通过破乳时间、Zeta电位、吸附等温线、界面张力以及表观黏度的测试,研究了EHDAB在SiO2颗粒表面的吸附情况及对所构建乳液稳定性的影响。实验结果表明,对于EHDAB/SiO2构建的乳液,随EHDAB含量的增加,乳液稳定性先增加后降低,然后趋于稳定,且热稳定性较好。EHDAB与SiO2的质量浓度比为0.1时,所构建乳液的稳定性最高。EHDAB主要用于乳液的形成,SiO2纳米颗粒则用于增强乳液的稳定性,固体颗粒稳定乳液的机理主要为机械阻隔机理。This work aimed at studying the synergistic effect of silica nanoparticles and cationic surface active agent hexadecyl dimethyl ethyl ammonium bromide(EHDAB)on constructing CO2/water emulsion.The adsorption condition of EHDAB on the surface of SiO2 particles and the effect on stability of the constructed emulsion were investigated by demulsification time,Zeta potential,DLS,adsorption isotherm,interfacial tension and apparent viscosity test.The result shows that,with the concentration of the EHDAB increasing,the stability of emulsion stabilized by EHDAB/SiO2 increased first and then decreased,and finally reached a plateau value with good thermal stability.The EHDAB/SiO2 concentration ratio of 0.1 provided the best performance for the constructed emulsion.EHDAB is mainly used for the formation of emulsions,and SiO2 nanoparticles are used to enhance the stability of emulsions.The mechanism of solid particle-stabilized emulsion is mechanical barrier mechanism.

关 键 词：SiO2纳米颗粒 表面活性剂 协同作用 CO2/水乳液 

分 类 号：TQ423.12[化学工程]