Abstract
Silica spheres of controlled pore size and well-defined surface area have been subject to silanisation using dichlorodimethylsilane. As a result, the total pore volume and surface area are made dramatically inaccessible. However, the average pore radius is not greatly changed. This suggests blocking of the pore mouths in these silicas, which is surprising since the silanising species are far smaller than the pores available. The mechanisms of this process are considered. However, silanisation does not decrease the extent of ethoxylated phenol adsorption, and the processes of removal of species causing pore blocking are considered.
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