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Modification of nano-fibriform silica by dimethyldichlorosilane |
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| Authors: | Lijuan Wang Anhuai Lu Junhong Ma Yuanyuan Li |
| Institution: | a National Laboratory of Mineral Materials, China University of Geosciences, Beijing 100083, China b State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China c School of Earth and Space Science, Peking University, Beijing 100871, China d Beijing Municipal Station of Agro-environment Monitoring, Beijing 100029, China |
| Abstract: | The modification of nano-fibriform silica by dimethyldichlorosilane was studied by transmission electron microscopy, X-ray powder diffraction, infrared spectroscopy, Raman spectroscopy, physical N2 adsorption techniques, differential thermal and thermogravimetric analysis, scanning electron microscopy, and elemental analyzer.The results show that dimethyl silane derivatives have been successfully covalently grafted on nano-fibriform silica. The polarity of the modified product decreases with the substitution of -OH groups by siloxyl groups. Therefore, the modified product can be easily dispersed in organic solvent and its compatibility with organic molecules is improved. After modification the pore volume decreases and the ductility greatly increases, indicating that the modified product is of a higher strength than before. The study demonstrates that the modified product can be used as an ideal additive to reinforce the strength of organic materials. |
| Keywords: | Chrysotile Nano-fibriform silica Dimethyldichlorosilane Organic modification |
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