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Ten-gram-scale preparation of PTMS-based monodisperse ORMOSIL nano- and microparticles and conversion to silica particles

  • Jung Soo Kim
  • Gyu Il Jung
  • Soo Jung Kim
  • Sang Man Koo
Research Paper
  • 115 Downloads

Abstract

Monodisperse organically modified silica (ORMOSIL) particles, with an average diameter ranging from 550 nm to 4.2 μm, were prepared at low temperature at a scale of about 10 g/batch by a simple one-step self-emulsion process. The reaction mixture was composed only of water, phenyltrimethoxysilane (PTMS), and a base catalyst, without any surfactants. The size control of the particles and the monodispersity of resultant particles were achieved through the controlled supply of hydrolyzed PTMS monomer molecules, which was enabled by manipulating the reaction parameters, such as monomer concentration, type and amount of base catalyst, stirring rate, and reaction temperature. PTMS-based ORMOSIL particles were converted into silica particles by employing either a wet chemical reaction with an oleum-sulfuric acid mixture or thermal treatment above 650 °C. Complete removal of organic groups from the ORMOSIL particles was achieved by the thermal treatment while ~ 74% removal was done by the chemical process used.

Graphical abstract

Keywords

Phenyltrimethoxysilane ORMOSIL Nanoparticle Microparticle Self-emulsion process Conversion to silica 

Notes

Funding information

This work was supported by the Technology Innovation Program (10052730, Rutile TiO2 Powder Manufacturing Technology by TiCl4 Oxidation) funded by the Ministry of Trade, Industry and Energy (MI, Korea).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest

Supplementary material

11051_2018_4186_MOESM1_ESM.docx (2.2 mb)
ESM 1 (DOCX 2246 kb)

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Copyright information

© Springer Science+Business Media B.V., part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Chemical EngineeringHanyang UniversitySeoulSouth Korea

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