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Posttreatment of silicas

The purely thermal posttreatment of dried silicas, which depending upon the temperature leads to more or less strong splitting off of water, is only of major importance for silica gels and is termed activation . [Pg.541]

Chemical posttreatment is already widely utilized and will probably be even more widely utilized in the future. It renders hydrophilic silica organophilic or hydrophobic by treating preferably pyrogenic silica, but also precipitated silicas, with organic or element-organic compounds, which react with the silanol groups forming chemical bonds  [Pg.541]

It is possible to endow the surface of silicas with functional groups e.g. by treatment with silane adhesion promoters XjSi-R-Y, where Y is the functional group [Pg.541]


See other pages where Posttreatment of silicas is mentioned: [Pg.541]    [Pg.541]    [Pg.541]   
See also in sourсe #XX -- [ Pg.513 ]




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