Rice husk is a plentiful waste material in all rice growing areas. It is primarily disposed of by open burning, which is, of course, ecologically undesirable, although. Low density silica aerogel beads were synthesized from rice husk ash via sodium silicate route. The gel beads were prepared by the ball dropping method and. The present work describes an improved process for preparation of silica aerogel microparticles (SAMs) for drug delivery from rice husk ash.
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Silica was leached from rice husk ash as sodium silicate by NaOH treatment. Using water glass as the silica source, SiO 2 aerogel was prepared via aerkgel sol—gel process and supercritical drying of ethanol.
Based on gelation time and porous characteristics of SiO 2 aerogel, the optimum gel preparation technology was determined such as silica concentration of 6. Incidentally, the density was as low as 0.
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Preparation of SiO2 aerogel from rice husk ash – RSC Advances (RSC Publishing)
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