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Sol-gel Process in Preparation of Organic-inorganic Hybrid Materials

J. Macan ; Faculty of Chemical Engineering and Technology University of Zagreb

Puni tekst: hrvatski, pdf (348 KB) str. 355-361 preuzimanja: 475* citiraj
APA 6th Edition
Macan, J. (2008). Sol-gel postupak za pripravu organsko-anorganskih hibridnih materijala. Kemija u industriji, 57 (7-8), 355-361. Preuzeto s https://hrcak.srce.hr/25070
MLA 8th Edition
Macan, J.. "Sol-gel postupak za pripravu organsko-anorganskih hibridnih materijala." Kemija u industriji, vol. 57, br. 7-8, 2008, str. 355-361. https://hrcak.srce.hr/25070. Citirano 23.07.2019.
Chicago 17th Edition
Macan, J.. "Sol-gel postupak za pripravu organsko-anorganskih hibridnih materijala." Kemija u industriji 57, br. 7-8 (2008): 355-361. https://hrcak.srce.hr/25070
Harvard
Macan, J. (2008). 'Sol-gel postupak za pripravu organsko-anorganskih hibridnih materijala', Kemija u industriji, 57(7-8), str. 355-361. Preuzeto s: https://hrcak.srce.hr/25070 (Datum pristupa: 23.07.2019.)
Vancouver
Macan J. Sol-gel postupak za pripravu organsko-anorganskih hibridnih materijala. Kemija u industriji [Internet]. 2008 [pristupljeno 23.07.2019.];57(7-8):355-361. Dostupno na: https://hrcak.srce.hr/25070
IEEE
J. Macan, "Sol-gel postupak za pripravu organsko-anorganskih hibridnih materijala", Kemija u industriji, vol.57, br. 7-8, str. 355-361, 2008. [Online]. Dostupno na: https://hrcak.srce.hr/25070. [Citirano: 23.07.2019.]

Sažetak
Organic-inorganic hybrid materials are a sort of nanostructured material in which the organic and inorganic phases are mixed at molecular level. The inorganic phase in hybrid materials is formed by the sol-gel process, which consists of reactions of hydrolysis and condensation of metal (usually silicon) alkoxides. Flexibility of sol-gel process enables creation of hybrid materials with varying organic and inorganic phases in different ratios, and consequently fine-tuning of their properties. In order to obtain true hybrid materials, contact between the phases should be at molecular level, so phase separation between thermodynamically incompatible organic and inorganic phases has to be prevented. Phase interaction can be improved by formation of hydrogen or covalent bonds between them during preparation of hybrid materials. Covalent bond can be introduced by organically modified silicon alkoxides containing a reactive organic group (substituent) capable of reacting with the organic phase. In order to obtain hybrid materials with desired structures, a detailed knowledge of hydrolysis and condensation mechanism is necessary. The choice of catalyst, whether acid or base, has the most significant influence on the structure of the inorganic phase. Other important parameters are alkoxide concentration, water: alkoxide ratio, type of alkoxide groups, solvent used, temperature, purity of chemicals used, etc. Hydrolysis and condensation of organically modified silicon alkoxides are additionally influenced by nature and size of the organic supstituent.

Ključne riječi
Organic-inorganic Hybrid Materials; Sol-gel Process

Hrčak ID: 25070

URI
https://hrcak.srce.hr/25070

[hrvatski]

Posjeta: 1.118 *