شماره ركورد كنفرانس :
360
عنوان مقاله :
A review on hydrolysis of tetraethyl orthosilicate in presence of ammonia as catalyst: effect of solvent on silica particle size
پديدآورندگان :
Yaftian Mohammad Reza نويسنده Phase Equilibria Research Laboratory, Department of Chemistry, Faculty of Science, University of Zanjan, 45371-38791, Zanjan, Iran , Khorasani M. نويسنده , Mohseni M نويسنده International Sturgeon Research Institute, P.O. Box 41635-3464, Rasht, Guilan, Iran-Department of Aquaculture/Feeds and Foods Nutrition Research Cent
كليدواژه :
Gel , Sol , Organic/inorganic hybrids , silica , Tetraethyl orthosilicate , Hydrolysis
عنوان كنفرانس :
The 6 th International Color & Coating Congress
چكيده فارسي :
In the recent decades, hybrid organic/inorganic materials have been successfully prepared by sol–gel processes. These materials are synthesized by chemically incorporating organic polymers into inorganic networks. Tetrafunctional silicon compounds, for example alkoxysilanes, have been used as starting materials in this process. Furthermore, hydrolysis of alkoxysilanes has been observed, together with condensation reactions between Si–OH groups, which obtain a crosslinked and linear Si–O–Si structures. The hydrolysis of this tetrafunctional silicon compounds (particularly tetraethyl orthosilicate) has been the subject of numerous investigations. Therefore, in this work, a study on hydrolysis reactions of tetraethyl orthosilicate in the presence of ammonia by various alcoholic solvents was carried out and influence of these solvents on particle size of produced silica has been investigated. Under identical reaction conditions, the particle size was found to be strongly dependent on the specific properties and spatial characteristics of the solvent.
شماره مدرك كنفرانس :
4184098
