双分散胶体：共存的纳米粒子和微乳液。

Bidisperse colloids: nanoparticles and microemulsions in coexistence.

机构信息

School of Chemistry, University of Bristol, Cantock's Close, Woodland Road, Bristol BS8 1TS, UK.

出版信息

J Colloid Interface Sci. 2010 Apr 15;344(2):447-50. doi: 10.1016/j.jcis.2010.01.011. Epub 2010 Jan 14.

DOI:10.1016/j.jcis.2010.01.011

PMID:20144832

Abstract

Mixed 'hard-soft' colloidal systems have been generated in which the 'hard' components (80 nm diameter silica nanoparticles) coexist with a population of 'soft' microemulsion droplets, both structures stabilised by the anionic surfactant sodium bis(ethylhexyl)sulfosuccinate (AOT) with toluene as solvent. The addition of water to swell the inverse micelles to form microemulsion droplets appears to increase attractive interactions between the silica particles (determined by DLS), possibly due to adsorption of some water at the silica-toluene interface; however, long-term stability of the dispersions is maintained. Small-angle neutron scattering was used to examine the structures present in these new colloidal systems.

摘要

混合的“硬-软”胶体系统已经被生成，其中“硬”组分（80nm 直径的二氧化硅纳米粒子）与“软”的微乳液液滴共存，这两种结构都由阴离子表面活性剂双（乙基己基）磺基琥珀酸钠（AOT）稳定，以甲苯为溶剂。向体系中加水以膨胀反胶束形成微乳液液滴，这似乎增加了二氧化硅粒子之间的吸引力相互作用（通过 DLS 确定），可能是由于一些水在二氧化硅-甲苯界面上的吸附；然而，分散体的长期稳定性得以保持。小角中子散射被用来研究这些新胶体系统中存在的结构。