Method for the preparation of composite silica alcogels, aerogels and xerogels, apparatus for carrying out the method continuously, and novel composite silica alcogels, aerogels and xerogels
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United States of America Patent
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Oct 30, 2014
app pub date -
Oct 26, 2012
filing date -
Oct 28, 2011
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Abstract
The invention relates to a method for the preparation of composite silica alcogels, aerogels and xerogels, comprising
- i) providing a reaction mixture comprising at least the following:silane reagent,base catalyst,gelation retarding additive,aqueous/organic solvent mixture,guest particle,ii) agitating the reaction mixture as necessary and sufficient until achieving the viscosity where the spontaneous movement of the guest particles does not occur anymore; andiii) shaping the material obtained to a desired shape during or after step ii); theniv) drying, if desired
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