Pickering乳液双相反转研究表面活性剂在纳米粒子表面的吸附研究  

Double inversion of pickering emulsions for the adsorption of surfactant on nanoparticles

作　　者：陈进华[1] 顾斌[1] 管玉东 尹德忠[1] 

机构地区：[1]西北工业大学理学院,陕西西安710072

出　　处：《化学研究与应用》2017年第4期569-572,共4页Chemical Research and Application

基　　金：国家级大学生创新训练计划项目(201610699278)资助

摘　　要：本实验通过制备纳米粒子和表面活性剂协同稳定的Pickering乳液,对乳液的双相反转的现象进行研究。结果表明,随表面活性剂浓度提高,乳液类型从O/W转变成W/O型,再转变成O/W型,即发生双相反转现象。基于实验现象提出了不同表面活性剂浓度条件下表面活性剂分子在纳米粒子表面的吸附模型,即单层吸附和双层吸附导致纳米粒子由偏亲水向偏疏水再到偏亲水性的转变。Double inversion of pickering emulsions stabilized synergistically by nanoparticles and a di-chain cationic surfactant was investigated. The result show that the double phase inversion of Pickering emulsions was achieved as the concentration of emulsifier increases,i. e. the emulsions changed from O/W type to W/O type,and to O/W type again. A precise mechanism of this double phase inversion was proposed. Under high emulsifier concentration, the particles were reversed to be hydrophilic by the formation of a surfactant bi-layer on surface of particles and the emulsion inverses from W/O to O/W type.

关 键 词：乳液双相反转 Pickering乳液 纳米粒子表面改性 表面与界面化学 

分 类 号：O647.11[理学—物理化学]