Drying Of Large Monolithic Aerogels Between Atmospheric And Supercritical Pressures

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Aerogel production by supercritical drying of organogels

75 1.3.Properties and applications of aerogels produced by supercritical drying Silica aerogels, the most common76 and extensively studied aerogels, show outstanding properties77 such as high porosity (80 99.8%), high specific surface area (500 1200m 2 /g), very

Development of Transparent and Opaque Vacuum Insulation

increase of inner pressures with time and cost are also factors that need to be considered and evaluated. Supercritical drying of the alcogels (thickness: 1.0 to 3.0) 15 (at atmospheric

Production of a novel X-Aerogel for Ballistics

Aerogels [6]. 3. Supercritical Drying and Ambient Drying Supercritical drying is a process in which liquid can be removed from a gel without causing the gel to collapse. Supercritical fluids behave like liquid and gas simultaneously and usually occur at high pressures and high temperatures. [1]. As

Evolution of mechanical properties and final textural

gels, before [25] or after the curing step [26], or the aerogels obtained after supercritical drying [26]. All these measurements were performed on gels obtained with R/C ratio ranging between 50 and 200. Relaxation appeared to be mainly controlled by hydrodynamic phenomena, i.e. flow of water. The contribution of the network remains

Comparative Analysis of the Physicochemical Characteristics

influence the size and aggregation behavior of primary clusters and the cluster aggregate size in the aerogels. Keywords: aerogels, supercritical drying, subcritical drying, mesostructure


subjecting the alcogel to supercritical drying in an autoclave to remove the alcohol. The produced aerogel specimens were then heat treated in air at 650-700 C to eliminate the organic residues after autoclave drying. The chemical and physical compositions of the prepared aerogel were adjusted through the molar ratio of the main components, type of