Surface modification of silica nanoparticles using phenyl trimethoxy silane and their dispersion stability in N-methyl-2-pyrrolidone

Taeho Kang, Inseok Jang, Seong-Geun Oh

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Surface modified silica nanoparticles were prepared through two-step sol-gel process. The introduction of phenyl group onto the surface of silica nanoparticles could be processed by varying the amounts of NH4OH and phenyl trimethoxysilane (PTMS) and molar ratio of H2O/Si during the second step. Under the optimized condition, the surface properties of silica nanoparticles were completely different before and after surface modification, since silanol groups were substituted by phenyl groups. The qualitative analysis of modified silica nanoparticles was conducted with Fourier transform infrared spectroscopy (FTIR). The degree of surface modification at the silica nanoparticles was examined based on the surface hydrophilic/hydrophobic moiety, surface charge and morphology. The mechanism of surface modification was inferred from a surface roughness. Finally when the silica was dispersed in N-methyl-2-pyrrolidone (NMP) as organic solvent, the modified silica was better in dispersion ability at high concentration (20 wt.%).

Original languageEnglish
Pages (from-to)24-31
Number of pages8
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume501
DOIs
StatePublished - 2016 Jul 20

Fingerprint

Silanes
Silicon Dioxide
Surface treatment
Silica
Nanoparticles
Surface charge
N-methylpyrrolidone
Organic solvents
Sol-gel process
Surface properties
Fourier transform infrared spectroscopy
Surface morphology
Surface roughness

Keywords

  • Dispersion stability
  • Phenyl trimethoxysilane
  • Silica
  • Sol-gel reaction
  • Surface modification

Cite this

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abstract = "Surface modified silica nanoparticles were prepared through two-step sol-gel process. The introduction of phenyl group onto the surface of silica nanoparticles could be processed by varying the amounts of NH4OH and phenyl trimethoxysilane (PTMS) and molar ratio of H2O/Si during the second step. Under the optimized condition, the surface properties of silica nanoparticles were completely different before and after surface modification, since silanol groups were substituted by phenyl groups. The qualitative analysis of modified silica nanoparticles was conducted with Fourier transform infrared spectroscopy (FTIR). The degree of surface modification at the silica nanoparticles was examined based on the surface hydrophilic/hydrophobic moiety, surface charge and morphology. The mechanism of surface modification was inferred from a surface roughness. Finally when the silica was dispersed in N-methyl-2-pyrrolidone (NMP) as organic solvent, the modified silica was better in dispersion ability at high concentration (20 wt.{\%}).",
keywords = "Dispersion stability, Phenyl trimethoxysilane, Silica, Sol-gel reaction, Surface modification",
author = "Taeho Kang and Inseok Jang and Seong-Geun Oh",
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AU - Kang, Taeho

AU - Jang, Inseok

AU - Oh, Seong-Geun

PY - 2016/7/20

Y1 - 2016/7/20

N2 - Surface modified silica nanoparticles were prepared through two-step sol-gel process. The introduction of phenyl group onto the surface of silica nanoparticles could be processed by varying the amounts of NH4OH and phenyl trimethoxysilane (PTMS) and molar ratio of H2O/Si during the second step. Under the optimized condition, the surface properties of silica nanoparticles were completely different before and after surface modification, since silanol groups were substituted by phenyl groups. The qualitative analysis of modified silica nanoparticles was conducted with Fourier transform infrared spectroscopy (FTIR). The degree of surface modification at the silica nanoparticles was examined based on the surface hydrophilic/hydrophobic moiety, surface charge and morphology. The mechanism of surface modification was inferred from a surface roughness. Finally when the silica was dispersed in N-methyl-2-pyrrolidone (NMP) as organic solvent, the modified silica was better in dispersion ability at high concentration (20 wt.%).

AB - Surface modified silica nanoparticles were prepared through two-step sol-gel process. The introduction of phenyl group onto the surface of silica nanoparticles could be processed by varying the amounts of NH4OH and phenyl trimethoxysilane (PTMS) and molar ratio of H2O/Si during the second step. Under the optimized condition, the surface properties of silica nanoparticles were completely different before and after surface modification, since silanol groups were substituted by phenyl groups. The qualitative analysis of modified silica nanoparticles was conducted with Fourier transform infrared spectroscopy (FTIR). The degree of surface modification at the silica nanoparticles was examined based on the surface hydrophilic/hydrophobic moiety, surface charge and morphology. The mechanism of surface modification was inferred from a surface roughness. Finally when the silica was dispersed in N-methyl-2-pyrrolidone (NMP) as organic solvent, the modified silica was better in dispersion ability at high concentration (20 wt.%).

KW - Dispersion stability

KW - Phenyl trimethoxysilane

KW - Silica

KW - Sol-gel reaction

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