Acta Phys. -Chim. Sin. ›› 2001, Vol. 17 ›› Issue (02): 169-172.doi: 10.3866/PKU.WHXB20010216

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Surface Organic Modification of SiO2 & Al2O3 Coated TiO2 Particles with Titanate Coupling Reagent

Lin Yu-Lan;Wang Ting-Jie;Qin Cao;Jin Yong   

  1. Department of Chemical Engineering,Tsinghua University,Beijing 100084
  • Received:2000-06-14 Revised:2000-09-04 Published:2001-02-15
  • Contact: Wang Ting-Jie

Abstract: The surface organic modification of TiO2 particles with titanate coupling reagent,which was precoated with double layers of SiO2 and Al2O3,was studied.Experiments showed that the modified particles exhibited hydrophobic characteristics.The modification state of the particle surface was characterized by IR spectroscopic measurement,pyrolytic gas chromatography,thermogravimetric analysis and Xray photoelectron spectra.The titanate coupling reagent binding with the hydroxyl on the particle surface was analyzed.The surface characteristics of premodification and postmodification particles were compared.

Key words: Titanium dioxide, Titanate coupling reagent, Surface modification,  Hydrophobic