the role of the dccas in the preparation of crack-free xerogel

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.