摘要
用Stber法制备单分散纳米二氧化硅,并以不同链长的脂肪醇对其表面进行疏水改性。研究改性二氧化硅在空气/水界面上单分子层的形成,评价改性二氧化硅的两亲性。由单分子层的π-A等温曲线显示,纳米二氧化硅单分子层结构取决于颗粒表面的疏水性。纳米二氧化硅改性剂的碳链越长,形成的单分子膜的崩溃压越高。
The Stober method nanoparticles was hydrophobized by was used to prepare monodisperse silica nanoparticles, and then the surface on silica grafting of alkyl chains of methanol, ethanol and butanol, respectively. The monolayer behavior of silica nanoparticles at the air/water interface was investigated. The π - A isotherm showed that the monolayer behavior of silica nanoparticles depended on the hydrophobicity of the surface on silica nanoparticles. When the length of the alkyl chain of alcohols increased, the higher collapse pressure was obtained.
出处
《广州化工》
CAS
2014年第6期1-2,7,共3页
GuangZhou Chemical Industry
基金
国家自然科学基金项目(No:21274022)
关键词
单分散纳米二氧化硅
表面疏水改性
单分子层
崩溃压
monodispersed silica nanoparticles
hydrophobized modification
monolayer
collapse pressure
