SYNTHESIS OF MESOPOROUS POLY(STYRENE-co-MALEIC ANHYDRIDE)/SILICA HYBRID MATERIALS VIA A NONSURFACTANT-TEMPLATED SOL-GEL PROCESS* |
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Authors: | Jie-bin Pang Kun-yuan Qiu Yen Wei |
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Institution: | a.Department of Polymer Science and Engineering; College of Chemistry and Molecular Engineering; Peking University; Beijing 100871; China.b.Department of Chemistry; Drexel University; Philadelphia; Pennsylvania 19104; USA.; |
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Abstract: | Mesoporous poly (styrene-co-maleic anhydride)/silica hybrid materials have been prepared. The synthesis wasachieved by the HCl-catalyzed sol-gel reactions of tetraethyl orthosilicate (TEOS) and styrene-maleic anhydride copolymerin the presence of 3-aminopropyl triethoxysilane (APTES) as a coupling agent and citric acid as a nonsurfactant template orpore-forming agent, followed by ethanol extraction. Characterization results from nitrogen sorption isotherms and powder X-ray diffraction indicate that polymer-modified mesoporous materials with large specific surface areas (e.g. 900 m~2/g) andpore volumes (e.g. 0.6 cm~3/g) could be prepared. As the citric acid concentration is increased, the specific surface areas, porevolumes and pore diameters of the hybrid materials increase. |
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Keywords: | Mesoporous hybrid material Poly(styrene-co-maleic anhydride)/silica Citric acid Nonsurfactant template Sol-gel process |
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