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Inorganic Organic Composite Materials as Absorbers for Organic Solvents

Published online by Cambridge University Press:  10 February 2011

V. Gerhard ,
H. Schmidt  and
U. Dreier
V. Gerhard
Affiliation:
Composite Department, Institut für Neue Materialien GmbH, Im Stadtwald, Geb. 43, D-66123 Saarbrücken, Germany
H. Schmidt
Affiliation:
Composite Department, Institut für Neue Materialien GmbH, Im Stadtwald, Geb. 43, D-66123 Saarbrücken, Germany
U. Dreier
Affiliation:
Composite Department, Institut für Neue Materialien GmbH, Im Stadtwald, Geb. 43, D-66123 Saarbrücken, Germany
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Abstract

Inorganic organic composite materials have been developed in the form of non-porous films on various substrates and as porous materials with specific surface areas of about 700 m2/ g. Both types of materials have been tested for absorption and adsorption of solvents from the gas phase (butyric acetate, benzene, toluene and xylene). The results show that the non-porous films could be loaded with solvents up to 30 wt.% and unloaded at 130 °C within a few minutes. The porous materials could be loaded up to 38 wt.%. The kinetics of desorption are slowed down to values of some hours, being however still fast compared to activated carbon. Adsorption in wet atmospheres do not affect adsorption capacity but leads to a decrease of adsorption kinetics due to a slowing down of the diffusion or a replacement of H2O against solvent within the pores.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 435: Symposium V – Better Ceramics Through Chemistry VII , 1996 , 455
Copyright
Copyright © Materials Research Society 1996

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References

1. Schmidt, H., Kaiser, A., M. Seiferling; presented at the Enviceram ‘91, 2. Int. Symposium, Saarbrücken, Germany, 1991 (unpublished).Google Scholar
2. Gerhard, V., Dreier, U., Schirra, H., Schmidt, H.; presented at the workshop “Teschnologie und Anwendung von Sol-Gel-Schichten, Frankfurt a. M., Germany, 1996 (unpublished).Google Scholar
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