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Coupling of synthesis and modification to produce hydrophobic or functionalized nano-silica particles.

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Title: Coupling of synthesis and modification to produce hydrophobic or functionalized nano-silica particles.
Authors: Yu, Keyi1 (AUTHOR), Liang, Yong1 (AUTHOR), Ma, Guanxiang1 (AUTHOR), Yang, Ling1 (AUTHOR), Wang, Ting-Jie1 (AUTHOR) wangtj@tsinghua.edu.cn
Source: Colloids & Surfaces A: Physicochemical & Engineering Aspects. Aug2019, Vol. 574, p122-130. 9p.
Subjects: Sodium dodecyl sulfate, Silane coupling agents, Nanoparticles, Silane
Abstract: Coupling of the synthesis and surface modification processes for hydrophobic or functionalized nano-silica particles was performed. Highly hydrophobic and high-density amino-functionalization were achieved for the nano-silica particles via the coupled process using SDS and APTES as modifiers, respectively. The coupled process was proven more effective than the non-coupled process. 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. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:Coupling of the synthesis and surface modification processes for hydrophobic or functionalized nano-silica particles was performed. Highly hydrophobic and high-density amino-functionalization were achieved for the nano-silica particles via the coupled process using SDS and APTES as modifiers, respectively. The coupled process was proven more effective than the non-coupled process. 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. [ABSTRACT FROM AUTHOR]
ISSN:09277757
DOI:10.1016/j.colsurfa.2019.04.077