| Summary: | 碩士 === 中原大學 === 化學研究所 === 93 === Abstract
In this study, a series of epoxy resin-silica hybrid materials have been successfully prepared by performing the thermal ring-opening polymerization of epoxy resin and sol-gel reactions of tetramethoxysilane (TMOS) simultaneously with suitable silane coupling agent. The as-prepared epoxy-silica hybrid sol-gel materials are then characterized by FTIR, solid state 29Si-NMR, TEM and AFM.
Epoxy-silica hybrid materials in the form of coating at low silica content on cold rolled steel (CRS) coupons are found much superior in corrosion protection over those of neat epoxy resin based on a series of electrochemical measurements of corrosion potential, polarization resistance, corrosion current and impedance spectroscopy. The enhancement of corrosion protection effect of hybrid sol-gel coatings may be attributed to the increase of adhesion strength and surface hydrophobicity of hybrid sol-gel coatings based on the Scotch tape test, FTIR-RAS spectroscopy, contact-angle test. Effect of material composition on the thermal stability, mechanical strength and optical clarity of epoxy-silica hybrid materials are investigated based on the DSC, TGA, DMA, hardness test and UV-visible transmission spectroscopy, respectively.
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