Sol-gel-based inorganic-organic

In recent years, silica sol-gel-based inorganic-organic hybrid materials have also been reported. The introduction of various functional groups into organic alkoxide has led to organically modified sol-gel glasses (ormosils). Some of the ormosil monomers and ormosil formations can be found in Fig. 16.3. Redox molecules can be coupled with the ormosil monomer functional group. The immobilized redox molecules can... 

Schmidt, H. and Krug, H. (1994) Sol-gel-based inorganic organic composite materials, in Inorganic and Orgartometallic Polymers II Advanced Materials and Intermediates (eds P. Wisian-Neilson, H.R. Allcock, and K.J. Wynne), American Chemical Society, Washington, DC,... 

Organic Materials. The sol-gel chemistry of organic materials is similar to that of inorganic materials. The first organic aerogel was prepared by the aqueous polyconclensation of resorcinol with formaldehyde using sodium carbonate as a base catalyst. 

U. Schubert, Sihca-based and transition metal-based inorganic-organic hybrid materials - A comparison, J. Sol-Gel Sci. TechnoL, vol. 26, pp. 47-55,... 

Shindou, T. Katayama, S. Yamada, N. Kamiya, K., Effect of Composition on Surface Properties of Polydimethylsiloxane-Based Inorganic/Organic Hybrid Films. J. Sol-Gel Sci. Technol. 2004, 30, 229-237. 

Membranes. Membranes comprised of activated alumina films less than 20 )J.m thick have been reported (46). These films are initially deposited via sol—gel technology (qv) from pseudoboehmite sols and are subsequently calcined to produce controlled pore sizes in the 2 to 10-nm range. Inorganic membrane systems based on this type of film and supported on soHd porous substrates have been introduced commercially. They are said to have better mechanical and thermal stabiUty than organic membranes (47). The activated alumina film comprises only a miniscule part of the total system (see Mel rane technology). 

There are various routes to synthesize rubber-based organic-inorganic hybrid composites through sol-gel process. These are mentioned in brief below. 

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