期刊
LANGMUIR
卷 26, 期 5, 页码 3579-3584出版社
AMER CHEMICAL SOC
DOI: 10.1021/la902990v
关键词
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资金
- National 973 Program [2009CB623402]
- State Key Laboratory funds [38901120]
- NJUT [44201115, 44201116]
Superhydrophobic nanosheet assemblies of polymerized n-octadecylsiloxane (PODS) were obtained on glass using n-octadecyltricholorsilane (OTS) as a starting material and acetone as the extracting agent. The coating layers were characterized by infrared spectroscopy. X-ray diffractometry, X-ray photoelectron spectroscopy, and contact angle measurements. It was shown that the PODS nanosheets consist of stacks of bilayered polysilsequioxane of OTS in a head-to-head arrangement. The relative humidity of the environment was found to control the self-assembly and eventually the morphology of the final coating. A coating-formation mechanism was proposed to describe the formation of OTS nanosheets on the basis of quick OTS hydrolysis, fast self-assembly, and slow polycondensation (i.e., after OTS hydrolysis, nanosheets can be formed only when the self-assembly process proceeds at a faster rate than polycondensation, which implies critical controlling factors in the formation of well-ordered OTS self-assembled monolayers (SAMs)).
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