Abstract
The processes of synthesis and surface modification were coupled herein to produce hydrophobic or functionalized nano-silica particles. Nano-silica particles with a spherical shape approximately 20 nm in diameter were synthesized. Nano-silica particles with high hydrophobicity were produced by coupling the synthesis with a modification process involving aqueous mixing, spray-drying, and thermal treatment, using the common surfactant sodium dodecyl sulfate (SDS) as a modifier. Amino-functionalized nano-silica particles with high grafting density were produced via the same process using the silane coupling agent γ-aminopropyltriethoxysilane (APTES). The modification was more effective with the coupled process than with the non-coupled process.
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