Polymers for Advanced Technologies · 2000 · 41 citations · 6 references
Natural SciencesMaterials EngineeringMaterials SciencePolymer ChemistryPolymer EngineeringPolymer MaterialsNanoporous MaterialsPolymer CharacterizationPolymer SurfacesPorous MaterialsSurface ModificationSurface Modification Of BiomaterialsPh DependencePolymer GraftingPolymer Grafting Onto SurfacesPolymer Surface ModificationPorous SilicaSilica Surface FunctionalizationSurface Chemistry Of SilicaWater Penetration
The surface of porous silica particles was modified with poly(acrylic acid) by reacting the carboxyl groups on poly(acrylic acid) with the amino groups of pregrafted aminopropyltriethoxysilane (APS). The chemical modifications by APS and polymer were characterized by infrared spectroscopy and the amount of APS and poly(acrylic acid) grafted to the surface were determined by thermal gravimetric analyses. The wettability of the modified silica particles, based on the rate of water penetration, was pH-dependent with PAA; at pH 1.5 the wettability increased but at pH 5.5 it decreased dramatically. The pore size and size distribution of the silica particles decreased with APS and polymer grafting. Copyright © 2000 John Wiley & Sons, Ltd.
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Grafting kinetics of poly(methyl methacrylate) on microparticulate silica
Gert Boven, Michiel L.C.M. Oosterling, Ger Challa et al. · Polymer · 1990 · 137 citations · Full text
Natural Sciences, Materials Engineering, Materials Science +8