2012 : SINTESIS SILIKA AEROGEL DENGAN BAHAN DASAR ABU BAGASSE

Prof.Dr.Ir. Sugeng Winardi M.Eng


Abstract

&60;h1&62;&60;strong&62;SYNTHESIS OF SILICA AEROGEL FROM BAGASSE ASH. Synthesis of silica aerogel from bagasse ash was done by alkaline extraction followed by sol-gel. Bagasse ash was extracted with NaOH at its boiling temperature for one hour with continue stirring, to produce sodium silicate. Subsequently, sodium silicate was pass through ionic exchanger resin, to produces silicic acid (SA). Silicic acid solution was then added with TMCS and HMDS as surface modifier agent. In order to form gel pH must be adjusted to final pH of 8-9 by addition of NH&60;sub&62;4&60;/sub&62;OH solution. The resulting gel then was aged and dried at ambient pressure and at a certain time and temperature. Characterization of products was done by measuring its pore volume, surface area, and hydrophobisity (contact angle). TMCS serves as water expeller from the pores and subsequently surface was modified …