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- W4247703407 abstract "Publisher SummaryThis chapter discusses the applications and procedures of chemical modification of silica. Applications of pure silica powders are based on porosity, active surface, hardness, thixotropic, and viscous characteristics. If the chemical structure of the silica surface is altered, these properties may be combined with specific chemical or physical interaction capacities. Thus, interaction with bulk matrices or individual molecules may be ameliorated. The purpose of chemical modification is the combination of the mechanical or structural properties of the pure substrate with dedicated intermolecular interactions. Chemical surface modification is the chemical bonding of molecules or molecule fragments to a surface to change its chemical or physical properties in a controlled way. The chemical modification of the surface of solids has led to increased possibilities in a number of fields on laboratory and on industrial scale. Applications of modified silicas may be classified according to the field in which they are of interest. In each field, the interaction with a specific type of molecules is effectuated. In the analytical field, organic compounds and metal ions are selectively adsorbed. The chemical field aims at the immobilization of metal complexes for use as catalyst centers. Chemical modification requires seemingly paradoxal support properties: (1) supports need to have a surface hydrophilic in nature but also to be insoluble in aqueous solutions and polar solvents; (2) supports are required, in many instances, to be porous but retain mechanical stability; and (3) they must be chemically stable but easily derivatized. Silica gel meets all of these requirements." @default.
- W4247703407 created "2022-05-12" @default.
- W4247703407 date "1995-01-01" @default.
- W4247703407 modified "2023-10-16" @default.
- W4247703407 title "Chapter 8 Chemical modification of silica: applications and procedures" @default.
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- W4247703407 doi "https://doi.org/10.1016/s0167-2991(06)81516-8" @default.
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