A novel polymide hybrid composite material for gas separation membrane was prepared by thermal imidisaton of the blend of poly(amic acid) and transitional metal organic complex.The poly(amic acid) was synthesized by condensation polymerization of hydroquiuone diphthalic anhydride or bistolueneketone dianhydride with methylene dianiline.The performance of obtained metal organic complex-polyimide hybrid materials was investigated.The results showed that all the obtained hybrid materials kept the traditional advantages of polyimides in mechanical properties

thermal resistance and chemical resistance.The structure of obtained polymide materials was characterized by WAXD and liquid balance.The experimental results indicated that the addition of transitional metal organic complex can increase the d-spacing of polymide molecular chains.As a result

compared with the corresponding polyimide

the permeability coefficients of the obtained polyimide hybrid materials can increase about 40% and the permeation selectivity varied slightly.