The Effect of Different Ratio in Carbon Aerogel on Pore Structure in Ambient Dry

Fang Wang; Lan Fang Yao; Jun Shen; Da Yong Guan; Zhou Fang

doi:10.4028/www.scientific.net/AMR.941-944.450

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The Effect of Different Ratio in Carbon Aerogel on Pore Structure in Ambient Dry

Abstract:

Organic aerogels were prepared by sol-gel polycondensation of resorcinol and formaldehyde using sodium carbonate as a catalyst and dried under ambient pressure. Carbon aerogels were obtained by the dried organic aerogels carbonized under nitrogen atmosphere at high temperature. The pore structures and surface characteristic of the carbon aerogels obtained were investigated by N₂ adsorption isotherms, scanning electron microscope (SEM). Through controlling the concentrations of the main ingredients (resorcinol and formaldehyde), catalyst concentration, we can find out the best concentration which the specific surface area can reach the highest. In this experiment the highest specific surface area was 1645m²/g. In addition, the results show that catalyst for the cross link effect between colloidal microspheres is greater than the growth of the colloid itself, and the effect of water solvent plays an important role in the density of carbon aerogel.