Silica-based aerogels

Catalyst carriers (e.g., with oxides or noble metals deposited on silica-based aerogels)... 

Materials and Processing Inorganic - Silica Based Aerogels... 

Vivod S L, Meador M A B, Nguyen B N, Quade D, Randall J (2(X)8) Di-isocyanate crosslinked aerogels with l,6-bis(trimethoxysilyl)hexane incorporated in silica backbone. Polym Preprints 49 521-522 Vivod S L, Meador M A B, Capadona L A, Sullivan R M, Ghosn L J, Clark N, McCorkle L, Quade D J (2(X)8) Carbon nanofiber incorporated silica based aerogels with di-isocyanate cross-linking. Polym Preprints 49 306 307... 

The incorporation of chitosan in an open stinctiire silica-based aerogel produces a class of materials that exhibit a wide range of physical and chemical properties that can be employed in new applications and that help to demonstrate the role of nanostructure in these low density solids. 

Even though an entire section of this handbook is dedicated to silica-based aerogels (Part 11), we feel that it is necessary to briefly summarize the basics about their synthesis and... 

Figure 17.2 Structural model of silica-based aerogels synthesized with different catalysts and...

Most aerogels that have been developed are silica based, and these have several special properties7-9 ... 

Very recently, hierarchically arranged aerogel monoliths [209], silica-based monoliths from swollen liquid crystals [210] or heptane/water/ethanol/sodium dodecylsulfate microemulsion [211], monolith-based hybrid components such as the PMOs [212], and silicon oxycarbide monoliths with better thermal properties than the pure (organo) silica monoliths [213] have been reported. These approaches have been extended also to alumina or aluminumsilicates [214, 215], titania [216, 217], zirconia [218], or ceramic-based [219] systems. 

Bang , U. K.H. Rao, A. P. Hirashima, H. Rao, A. V., Physico-chemical properties of ambiently dried sodium sihcate based aerogels catalyzed with various acids, J. Sol-Gel Sci. Technol. 2009, 50, 87-97 Shewale, P. M. Rao, A. V. Gurav, J. L. Rao, A. P., Synthesis and characterization of low density and hydrophobic silica aerogels dried at ambient pressure using sodium silicate precursor, J. Porous Mater. 2009, 16 (1), 101-108... 

Woignier T, Phalippou J (1988) Mechanical strength of silica aerogels. J Non-Cryst Sohds 100 404-408 Haereid S, Anderson J, Einarsrud M A, Hua D W, Smith D M (1995) Thermal and temporal aging of TMOS-based aerogel precursors in water. J Non-Cryst Solids 185 221-226... 

While almost all papers on nanocomposite aerogels containing metal oxide nanoparticles dispersed in an insulating matrix refer to silica-based systems, a few examples are also available for other matrices. 

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