Paper Title:
Application of Hydrophobic Silica/Fiber Composite Aerogels in Organic Absorption
  Abstract

SiO2 aerogels, the lightest solid material have attracted much attention recently. However, it is difficult to be used in practical applications due to its fragility. A facile one step polymerincorporation sol-gel process, together with a surface modification and a normal temperature drying process, was developed to prepare silica-fiber composite aerogels. Four fibers (polyester fiber, polypropylene fiber, lignin fiber, polycrylonitrile fiber) were selected to enhance the intensity of silica aerogels, respectively. The obtained samples were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Scanning electron microscopy (SEM), and Brunauer-Emmett-Teller (BET) specific surface area. Results showed that samples have a plenty of hydrophobic methyl group attached to their surface. The continuous network structure composed of silica aerogels of high purity are non-crystallized, porous, surface areas from 800 to 980 m2/g and light weight nano-materials. Adsorption experiment of the above samples over organic solution (benzene, toluene) was tested. The composite aerogels absorbed the organic liquids by nearly 6-8 times its own mass, showing potential application in organic absorption.

  Info
Periodical
Materials Science Forum (Volumes 675-677)
Edited by
Yi Tan and Dongying Ju
Pages
1035-1039
DOI
10.4028/www.scientific.net/MSF.675-677.1035
Citation
W. Wei, C. W. Li, J. M. Xie, J. J. Zhu, X. M. Lü, C. H. Yan, "Application of Hydrophobic Silica/Fiber Composite Aerogels in Organic Absorption", Materials Science Forum, Vols. 675-677, pp. 1035-1039, 2011
Online since
February 2011
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Price
$32.00
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