Journal
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
Volume 55, Issue 3, Pages 261-268Publisher
SPRINGER
DOI: 10.1007/s10971-010-2243-4
Keywords
Sol-gel coating; Methyltriethoxysilane; Polymethylhydrosiloxane; 3-aminopropyltriethoxysilane
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Funding
- Guangzhou Electronic Information Polymers Industry Engineering Technology Research Center
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New composite coatings were prepared by mixing pre-hydrolyzed methyltriethoxysilane (MTES) sol by an acidic catalyst dibutyltin dilaurate (DBTDL) and polymethylhydrosiloxane (PMHS) in gasoline at room temperature. The gel process was thoroughly investigated regarding the use of different basic catalyst [3-aminopropyltriethoxysilane (APTES) or triethylamine (TEA)], as well as the ratios of pre-hydrolyzed MTES sol and PMHS with various content of active H. It was revealed that the composite coating from 2:1 ratio (w/w) of pre-hydrolyzed MTES sol with equimolar amounts of water and PMHS1.55 under the catalysis of APTES demonstrated high pencil hardness, and excellent resistance against contamination and corrosion. This composite coating (MTPM21-A) was further characterized by FTIR, Si-29 NMR, DSC and TGA.
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