COLL 188 |
| Pinsuda Viravathana1, David W.M. Marr2, Rachada Pattayawan1, Attasak Rattanasumrit1, and Siriporn Larpkiattaworn3. (1) Department of Chemistry, Kasetsart University, Bangkok, 10900, Thailand, (2) Department of Chemical Engineering, Colorado School of Mines, Golden, CO 80401, (3) Thailand Institute of Scientific and Technological Research, 196 Phaholyothin Road, Chatuchak, Bangkok, 10900, Thailand |
| This study focuses on the syntheses of porous (type I) and hollow (type II) microsphere silica particles. For type I, the porous microsphere silica has been prepared by co-hydrolysis and condensation of tetraethylorthosilicate (TEOS) and 3-aminopropyltriethoxysilane (APTES) using ethanol, ammonium hydroxide, and water as solvents. For type II, the hollow microsphere silica, also called ceramic hollow microsphere silica (CHMS), has been synthesized by the emulsion of silica colloid (LUDOX) and 2-ethyl-1-hexanol (2E1H). Particle morphology is investigated by the scanning electron microscope (SEM) and their surface properties are investigated via the BET method. To modify their surface, the anhydrous silica particles (type I and II) are esterified by octadecanol at elevated temperature of 200oC under nitrogen atmosphere. The esterified particles are used for trace oil removal in the oil-contaminated water. The amount of the removed oil is analysed via high performance liquid chromatography (HPLC). The oil adsorption onto the surface of these two particle types is studied.
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Posters: Fundamental Research in Surface and Colloid Chemistry
6:00 PM-8:00 PM, Monday, March 29, 2004 Disneyland -- North Exhibit Hall, Poster
Division of Colloid and Surface Chemistry |