Material and rheological properties of (glycidoxypropyl) trimethoxysilane modified colloidal silica coatings

Hyun U. Kang, Jung Kook Park, Sung Hyun Kim

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Colloidal coating solution was prepared to enhance the hydrophilic property of the film surface. Water and ethanol were used as the dispersion media and (glycidoxypropyl) trimethoxysilane (GPS) as a binder in the colloidal silica coatings. Ethylene diamine was added to the colloidal silica solution as the curing agent. The colloidal silica solution was regarded as a hard-sphere suspension model with low volume fraction of the silica particles. Rheological properties of the silica suspensions modified with GPS have been investigated as a function of pH and concentration. The acidic solution showed high viscosity change by fast hydrolysis reaction and adsorption of the organic binders on the surface of silica particles. However, the hydrolysis was slow at the basic condition and the binders combined with themselves by condensation. The viscosity change was smallest at pH 7. The viscosity increased with the curing time after adding ethylenediamine, and the increase of viscosity at low pH was higher than that at high pH. The hydrophilic properties of the coating film were investigated by the contact angle of water and film surface. The smallest contact angle was shown under the strong acidic condition of pH 2.

Original languageEnglish
Pages (from-to)175-182
Number of pages8
JournalKorea Australia Rheology Journal
Volume16
Issue number4
Publication statusPublished - 2004 Dec 1

Fingerprint

Silicon Dioxide
Silica
silicon dioxide
coatings
Coatings
Viscosity
viscosity
Binders
ethylenediamine
curing
Contact angle
Curing
hydrolysis
Hydrolysis
Suspensions
Diamines
Water
water
coating
trimethoxysilane

Keywords

  • Hydrophilic property
  • Modified silica coating
  • Sol-gel method

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes

Cite this

Material and rheological properties of (glycidoxypropyl) trimethoxysilane modified colloidal silica coatings. / Kang, Hyun U.; Park, Jung Kook; Kim, Sung Hyun.

In: Korea Australia Rheology Journal, Vol. 16, No. 4, 01.12.2004, p. 175-182.

Research output: Contribution to journalArticle

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