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.
出处
《化学研究与应用》
CAS
CSCD
北大核心
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
