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Chemistry for Sustainable Development

2009 year, number 1

Thermal transformation of cellulose in the presence of silicon-containing additives

O. S. Efimova, G. P. Khokhlova
Keywords: thermal transformation, cellulose, silicon dioxide, polycarbosilane
Pages: 81-87

Abstract

It is shown by means of thermogravimetry, differential thermal analysis, mass spectrometry, IR spectroscopy and electron microscopy that the character of cellulose thermal transformation changes and the yield of carbon residue increases during cellulose heating in the presence of SiO2 and polycarbosilane within temperature range up to 900 оC. In the case of polycarbosilane addition, silicon is present in the cabon material in the form of organosilicon fragments with Si-C and Si-O-C bonds, as well as in the form of silicon oxycarbide. With the addition of SiО2, the major amount of silicon is conserved in the form of oxide; the amorphous modification within the composition gets transformed into cristobalite.