How silanization influences aggregation and moisture sorption behaviours of silanized silica: analysis of porosity and multilayer moisture adsorption.

ABSTRACT: Based on the results of nitrogen adsorption and dynamic vapour sorption as well as analysis by the Hailwood-Horrobin (H-H) model, the effects of γ-methacryloxypropyltrimethoxysilane (MPTS) on the agglomeration and moisture sorption properties of fumed silica particles were investigated. After adding various concentrations (2%, 4%, 6% and 8%) of MPTS, different degrees of silanization were obtained by showing various ─OH group contents on the silica surface, which resulted in silica agglomerates with different porous structures. The bigger mesopores in the unmodified silica agglomerates became smaller and finally disappeared after MPTS modification and the Bruanuer-Emmett-Teller surface area decreased more gradually with an increase in MPTS concentration. The H-H model fitted the sorption i

SUBMITTER: Jiang J 

PROVIDER: S-EPMC6030321 | biostudies-literature | 2018 Jun

REPOSITORIES: biostudies-literature