Polyethylene glycol (PEG) with flexible chains was blended with cationexchange membrane carboxymethyl cellulose (CMC) and anion-exchange membrane chitosan (CS) in order to enhance the compatibility and mechanical properties. Then CMC and CS were modified by Copper multicarboxylphthalocyanine (CuPc) and acetyl ferrocene respectively. CuPcmCMC/mCS bipolar membranes were prepared by a pasting method. The metallophthalocyanine derivatives were combined with the molecular chains in the membranes to form the net structure. The structure stability of the interlayers and the dimensional stability were increased. The results of swelling degree and TGA show that the properties of CuPc-mCMC/mCS bipolar membranes are improved after modification. The CuPc-mCMC/mCS bipolar membranes show good thermal stability until 150℃

which is available to be used in the organic electrosynthesis. Both of the membrane impedance and the working voltage of CuPc-mCMC/mCS bipolar membranes are small. The working voltage is as low as 3.0 V during the curreuring density at around 45 mA/cm2. The —COOH groups in the metallophthalocyanine derivatives as the ion transmission media accelerate the transfer rate of ions

and the CuPcmCMC/mCS bipolar membrane exhibits a higher ion penetrability after modification.