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| INFLUENCE OF DDS CONTENT ON THE PROPERTIES OF ORGANOSILICONE/SiO2 HYBRID COATINGS |
| LIN Jiyue, LIU Guangming,CHEN Gang |
| School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063 |
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Abstract With tetraethyl orthosilicate (TEOS) as inorganic precursor, methyl triethoxysilane (MTES) and diphenyl dimethoxy silane (DDS) as organic precursor, hydrochloric acid and water as catalysts, organosilicone/SiO2organic-inorganic hybrid sols with different content of DDS have been prepared through hydrolysis-polycondensation reaction. Then a hybrid coating was obtained by drying at 100℃ for 12 hours. It showed that the hardness, adhesion and corrosion-resistance performances decreased with the increasing content of DDS, the corrosion-resistance property was poor without adding any DDS. The flexibilities were the grade one. The heat-resistance of the coating was good under low temperature. The comprehensive performances of the coating were optimal when the molar ratio of TEOS:MTES:DDS was 6:9:2 in the sol.
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Received: 25 January 2010
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Corresponding Authors:
LIU Guangming
E-mail: tisic@126.com
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