Textural Characterization of SiO2-PEG Xerogels

Abstract

Abstract: The porous SiO₂ xerogels with controlled structure were obtained from TEOS in the presence of PEG by sol-gel method. The results showed that PEG restrained the hydrolysis reaction of TEOS, and then modified the surface of sol particle to form the PEG-clusters (i.e. the ring-like networks in short order). As a result, the addition of PEG could adjust the texture properties of SiO₂ xerogels. It has been found that the SiO₂ xerogel has a stronger flexible skeleton, narrower pore distribution, and higher thermal stability with the removal of the residue organic(such as PEG and so on) by vacuum heat-treatment.

Key words: SiO₂-PEG, Pore distribution, Controlled structure, Sol-Gel

CLC Number:

O61.4

TrendMD:

SUN Ji-Hong, GONG Yan-Jun, FAN Wen-Hao, WU Dong, SUN Yu-Han . Textural Characterization of SiO₂-PEG Xerogels[J]. Chem. J. Chinese Universities, 2000, 21(1): 95.

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Textural Characterization of SiO₂-PEG Xerogels

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