Hydrophobic modification of silica nanoparticle by using aerosol spray reactor

Cited 16 time in webofscience Cited 16 time in scopus
  • Hit : 702
  • Download : 1
Surface of commercial silica particle was hydrophobically modified with octyltriethoxy-silane (OTES) in an aerosol spray reactor. When the reactor temperature was higher than 250degreesC, one liquid droplet produced one agglomerated particle. However, when the reactor temperature was lower than 250 degreesC, the original droplet shape was completely disappeared and particles were produced in a dispersed state. Based on the Fourier transform-infrared (FT-IR), thermo gravimetric analysis (TGA) and scanning electron microscopy (SEM) results, competition between the evaporation of solvent and reaction of OTES with the silica surface was proposed to be responsible for the morphology dependency on the reactor temperature. Hydrophobicity of the modified particle was quantitatively measured by ethanol volume ratio (EVR) and contact angle. The hydrophobicity was increased as increasing the concentration of OTES and had the optimum point with the reaction temperature. It was found that the discrepancy of the hydrophobicity measured by the EVR and contact angle gave information on the degree of agglomeration of particles produced by the aerosol spray reactor. (C) 2004 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2004-04
Language
English
Article Type
Article
Keywords

PARTICLES; COATINGS; SURFACE; POWDERS

Citation

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, v.236, no.1-3, pp.73 - 79

ISSN
0927-7757
DOI
10.1016/j.colsurfa.2004.01.025
URI
http://hdl.handle.net/10203/9223
Appears in Collection
CBE-Journal Papers(저널논문)
Files in This Item
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 16 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0