Polyimide materials such as microporous polyimide, have been used for CO2 adsorption by a physical method owing to the abundant nitrogen and oxygen atoms in the imide ring, which results in the dipole-quadrupole interactions between the pore surface and the CO2 molecule.Amine-functional silica aerogels also possess excellent capacity of CO2adsorption by chemical approach.In this work, a polyimide/silica composite aerogel was successfully explored, which was chemically linked by an "amphoteric"crosslinker,containing the Si-O bond for inorganic silica and the-NH2 group forming the polymer crosslinking structure.The 4,4-oxydianiline(ODA) and 3,3,4,4-tetracarboxylic (BPDA)were used as diamine and dianhybride, respectively, and 3-(2-aminoethylamino)propyltrlethoxysllane as crosslinker.The composite aerogel has low density(0.06g/cm3), high surface areas (216 to 290 m2/g) , narrow pore diameter distribution(~7nm) ,and extremelyhigh porosity (97%),which is higher than single polyimide aerogel reported previously(Fig.1(a)).FTIR spectroscopy of composite is presented in Fig.1(b).The band at 1560cm-1 is assigned to the free amine (-NH2) deformation mode, the band at 1719cm-1and 1774cm-1 are assigned to carbonyl group (C=O) symmetrical and asymmetric stretching mode, respectively, which can demonstrate the extent of imide ring.Moreover, the 1388cm-1 of C-N-C bond is consistent with the front conclusion.Thus, the aerogel structuresaforementioned imply that this composite can be a promising candidate material in the application of CO2 adsorption.