Paper Title:
Solvents Effects on Physicochemical Properties of Nano-Porous Silica Aerogels Prepared by Ambient Pressure Drying Method
  Abstract

Hydrophobic silica aerogels were synthesized by an ambient pressure drying method from silicic acid with a different pH value, which was prepared from sodium silicate solution (water glass). In this study we chose various hydrocarbon class solvents such as pentane, hexane, heptane, and toluene, and performed surface modification in TMCS (trimethylchlorosilane)/solvent solutions in order to improve reproducibility in aerogel production. Densities of the aerogels were about 0.1 ~ 0.3 g/cm3 , and apparent porosities were 88 ~ 96 %, depending on the processing conditions. Specific surface area was approximately 730 ~ 950 m2/g, and average pore size around 10 nm.

  Info
Periodical
Materials Science Forum (Volumes 510-511)
Edited by
Hyung Sun Kim, Yu Bao Li and Soo Wohn Lee
Pages
910-913
DOI
10.4028/www.scientific.net/MSF.510-511.910
Citation
S. H. Lee, E. A. Lee, H. J. Hwang, J. W. Moon, I. S. Han, S. K. Woo, "Solvents Effects on Physicochemical Properties of Nano-Porous Silica Aerogels Prepared by Ambient Pressure Drying Method", Materials Science Forum, Vols. 510-511, pp. 910-913, 2006
Online since
March 2006
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Fang He, Hai Lei Zhao, Xian Hui Qu, Wei Hua Qiu, Wei Jiang Wu
Abstract:Silica aerogels were synthesized from hybrid silicon sources of TEOS and acid silica sol by two-step sol-gel method and supercritical...
1509
Authors: Chang Yeoul Kim, Jong Kyu Lee, Byung Ik Kim
Abstract:Aerogel has its advantages of light density of 0.003-0.35 g/cm3 and its high specific surface area, 600-1000m2/g, mean pore diameter ~20nm....
673
Authors: Hae Jin Hwang, Chul Eui Kim, Young Chul Cha
Abstract:In order to prevent the irreversible collapse of the silica aerogel backbone upon the drying of the liquid phase of silica wet gel derived...
1053
Authors: In Sub Han, Jong Chul Park, Se Young Kim, Ki Seog Hong
Abstract:Silica wet gels were prepared from water glass (29 wt.% SiO2) by using Amberlite as a ion exchange resin. After washing in distilled water,...
790
Authors: Zulhelmi Alif Abdul Halim, Muhamad Azizi Mat Yajid, Halimaton Hamdan
Chapter 3: Functional Materials and Alloys
Abstract:Low density silica aerogel beads were synthesized from rice husk ash via sodium silicate route. The gel beads were prepared by the ball...
106