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  Sintesis silika aerogel dengan bahan dasar abu bagasse  
Diupload oleh : Heru Setyawan
Pengarang : Nazriati, H. Setyawan, S. Winardi, R. Arizanova, Enggar Eka V.
Tahun : 2011
Dipublikasikan di : Reaktor, 13(4), 220-224
Jenis Jurnal : Jurnal Terakreditasi
Eksternal Link : http://ejournal.undip.ac.id/index.php/reaktor/issue/archive
Bidang Penelitian :
Abstrak : 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 NH4OH 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 expeler from the pores and subsequently surface was modified by HMDS and TMCS. HMDS content will linearly increase surface area, pore volume, and the contact angle of the resulting silica aerogel. Characteristics of silica aerogel was generated by varying the composition of the SA: TMCS: HMDS resulting has a surface area of 50-468 m2 /g, pore volume from 0.2 to 0.9 m3 /g, the contact angle of 48-119 and pore diameter ranging from 5.7 - 22.56 nm. Based on the resulting pore diameter, the synthesized of silica aerogel categorized as mesoporous.
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