For organic aerogels, resorcinol formaldehyde is the most aerogel studied at present. ‘In 1989, Pekala, from Lawfnce Livemore National Laboratory of the United States, prepared the organic aerogel successfully for the first time using resorcin and formaldehyde as raw materials, and then carbonized in an inert atmosphere to prepare carbon aerogel.’[10] ‘The first step is addition reaction-- resorcinol and formaldehyde form single/multiple hydroxymethyl resorcinol under the catalysis of alkali(such as sodium carbonate). Then, the condensation reaction conducts which occurs between the hydroxymethyl(- CH2OH) of the intermediate single/poly hydroxymethyl resorcinol and the position that is not replaced on the benzene ring, and the colloidal particles formed by methylene bonds (CH2 -) and methylene ether bonds (CH2OCH2 -) are formed respectively.’[11]