ORGN 170 |
| Xingwen Zhang1, Lijiang Hu1, and Dezhi Sun2. (1) Department of Applied Chemistry, Harbin Institute of Technology, Box 713, Harbin, 150001, China, (2) Department of Environment Engineering, Harbin Institute of Technology, Box 713, harbin, 150001, China |
| Epoxy-silsesquioxanes (ESSO) derived from (3-glycidoxypropyl)trimethoxysilanes (GPMS) and their blends modified with tetraethoxysilane (TEOS) were prepared by sol-gel process. The ormosil coatings with different TEOS content were prepared by adding the stoichiometric amount of ethylenediamine to ESSO solutions in ethanol, dip-coating over glass substrates, and curing using an appropriate thermal cycle. The tribological behaviors and surface roughness of the epoxy-silsesquioxane coating with different TEOS were comparatively investigated with a nanoscratch test and SPM measurement. As the results, the surface roughness of the epoxy-silsesquioxane coating was affected by the content of TEOS. The ESSO coating with 10% TEOS had the smallest friction coefficient and showed better wear resistance. Also, the ESSO coating with 20% TEOS exhibited a good combination of intrinsic values of hardness (0.51 GPa) and brittle index (0.056), that makes them suitable as coatings of plastic substrates. |
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Asymmetric Reactions and Syntheses, Metal-Mediated Reactions, Materials, Molecular Recognition
8:00 PM-10:00 PM, Sunday, August 22, 2004 Pennsylvania Convention Center -- Hall D, Poster
Division of Organic Chemistry |