RF aerogels, which process good nano-network structure, were prepared by resorcinol and formalde鄄
hyde diluted in deionized water in the presence of sodium carbonate as catalyst, followed by ambient drying. The struc鄄
ture of the porous organic aerogels was investigated by SEM and the measurement of pore size distribution. The special
surface area was determined with BET. The results showed that the structure of organic aerogels are controlled from mi鄄
cropore to macropore by changing the concentration of catalyst. The samples prepared by ambient drying have low densi鄄
ty of 321 to 632 kg/ m3,and the sample density is 428 kg/ m3 with specific surface area of 188 m2 / g.