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Silica aerogels were made by sol-gel techniques using industrial silicon derivatives (polyethoxydisiloxanes, PEDS-P x ) obtained by the reaction of tetraethoxysilane (TEOS) and water (water to TEOS molar fraction, n, ranging between 0.8 and 1.8) in the presence of sulfuric acid. For each type of precursor, sol-gel reactions were performed under acidic, neutral or basic conditions, in alcohols...
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