Cookies Policy

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies.

I accept this policy

Find out more here

The change in wettability and structure of silica powder surfaces modified with hexamethyldisilazane

No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.

Brill’s MyBook program is exclusively available on BrillOnline Books and Journals. Students and scholars affiliated with an institution that has purchased a Brill E-Book on the BrillOnline platform automatically have access to the MyBook option for the title(s) acquired by the Library. Brill MyBook is a print-on-demand paperback copy which is sold at a favorably uniform low price.

This Article is currently unavailable for purchase.
Add to Favorites
You must be logged in to use this functionality

The wettability and surface structure of precipitated silica surface loaded trimethylsilyl groups were investigated. By measuring water and nitrogen adsorptions, it was found that the non-treated sample had micropores. The pores with a diameter less than 0.8 nm were not modified, while the pores with a diameter from 0.8 to 0.9 nm were modified by trimethylsilyl groups and closed by them. From these results, it was assumed that the former pores would become sites for water vapor as surface silanol groups after modification and the latter pores would be independent of water adsorption. The character of the silica bare surface disappeared above a surface conversion rate of 33%. These results are deduced from neopentane adsorption experiments. Furthermore, the water adsorption capacity near saturated pressure, as an index of micro-wettability, did not reach the theoretical monolayer capacity above the same conversion rate (33%). It was also indicated that the preferential dispersion property as an index of macro-wettability drastically changed at a conversion rate of about 33%. From these results, it was demonstrated that the wettability is closely related to the surface structure interfering with the adsorption of water.

Affiliations: 1: Department of Applied Chemistry, Graduate School of Engineering, Tokyo Metropolitan University, 1-1 Minami-ohsawa, Hachioji, Tokyo 192-0397, Japan


Full text loading...


Data & Media loading...

Article metrics loading...



Can't access your account?
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation