中文

Journal of Shanghai University（Natural Science Edition） ›› 2011, Vol. 17 ›› Issue (6): 762-767.

• Material Science • Previous Articles     Next Articles

Improving Water-Wettability of Graphite Using SiO2 Sol-Gel Coatings

  

  1. (1. School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China; 
    2. Research Center of Nanoscience and Nanotechnology, Shanghai University, Shanghai 200444, China)
  • Received:2010-04-13 Online:2011-12-28 Published:2011-12-28

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Abstract: On the base of the heat treatment on graphite, the modification of surface properties of flake graphite was made via sol-gel and ball milling methods using tetraethoxysilane(TEOS) as precursor. IR analysis showed that some hydrophobic groups, such as ketone and double bond, disappeared and hydrophilic carboxyl groups were formed after heat treatment. The results indicated that the hydrophilicity of the modification graphite was improved. TGA-DSC analysis revealed that the weight loss was reduced from 100% to 70%, as well as the oxidation resistance of graphite was improved greatly. SEM and EDS showed that a dense network silicon oxide layer formed on the surface of modified graphite

Key words: graphite, heat treatment, oxidation resistance, SiO2, sol-gel, water-wettability

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