The role of the DCCAs in the preparation of crack-free Xerogel

International Journal of Nano Dimension

مقاله 7، دوره 5، Issue 4، دی 2014، صفحه 351-363   

نوع مقاله: Reasearch Paper

شناسه دیجیتال (DOI): 10.7508/ijnd.2014.04.006

نویسندگان

M. Tanhaei^* ؛ V. Mohammady

Department of Chemistry, Faculty of Science, Imam Khomeini, International University, Ghazvin, Iran.

چکیده

Sol–gel chemistry is an efficient tool to control the morphology and reactivity of solids. Drying is the crucial step due to the capillary forces exerted during the classic ambient drying process, which induces the collapse of the wet gel porosity. The use of N, N-dimethylformamide (DMF), a newly found DCCA were found to be effective in the sol–gel synthesis of crack-free silica gel monolith from tetraethoxysilane (TEOS) via acid catalyzed. We investigate the effect of N, N- dimethylformamide as DCCAs in simple inorganic silica obtained from tetraethoxysilane (TEOS) and the effects drying control chemical additives (DCCA) on gelatin time and physical properties of the dry gel were examined in an acidic silica sol-gel process.

کلیدواژه‌ها

Sol-gel processing؛ Crack-free xerogel؛ Synthesis؛ Porosity؛ N, N-dimethylformamide(DMF)