Preparation and Characterization of Hydrophobic Mesoporous SiO2 Aerogel

Abstract:

Article Preview

Hydrophobic mesoporous silica aerogels were synthesized using cheap industrial grade tetraethyl orthosilicate (TEOS) as precursor by ambient pressure drying.The silica alcogels were prepared by acid-base sol-gel polymerization of the TEOS, the surfaces of silica alcogels were modified using trimethylchlorosilane/ hexamethyldisiloxane via simultaneous solvent exchange and surface modification. The attachment of trymethylsilyl (-Si(CH3)3) groups to the silica surface was confirmed by the presence of Si-CH3 peaks at 2963, 1256 and 845 cm−1 in the IR spectra. Properties of the aerogels were examined by SEM, TEM, XRD, BET and DTA-TG analyses. The results indicate that the aerogels in a typical amorphous state have a highly porous network with an average pore diameter in the range of 5–10 nm, have high specific surface area (931 m2/g) and are thermally stable up to 322 °C.

Info:

Periodical:

Advanced Materials Research (Volumes 306-307)

Edited by:

Shiquan Liu and Min Zuo

Pages:

1393-1397

DOI:

10.4028/www.scientific.net/AMR.306-307.1393

Citation:

H. X. Liu et al., "Preparation and Characterization of Hydrophobic Mesoporous SiO2 Aerogel", Advanced Materials Research, Vols. 306-307, pp. 1393-1397, 2011

Online since:

August 2011

Export:

Price:

$35.00

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

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