JOURNAL of the Tunisian Chemical Society

serving the Research, the Education and the Industry

Synthèse et caractérisation d’aérogels obtenus à partir de sable tunisien

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The elaboration of gels in the system SiO2 – Na2O was realised by destabilization of sols obtained by alkaline attack of a Tunisia sand. The influence of the sol concentration, pH and nature of the destabilization acid on the gelation time was studied. The porous volume and the specific surface of the aerogels, obtained by hypercritical drying, is influenced by the variation of the concentration, pH and aging time of gels.

S. Marzouk, J. Bouaziz, B. Elleuch, M. Fourati

gels, aerogels, specific viscosity, porous volume, specific surface

Pages 851-860

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