Synthesis and Characterization of New Polyimide Containing Calix[4]arenes in the Polymer Backbone with Transport Ability

New polyimide containing calix4]arene moieties on the polymer backbone was successfully synthesized in N-methyl-2-pyrrolidone(NMP)by polycondensations of 3,3',4,4'-oxydiphthalic anhydride(ODPA)with the diaminocalix4]arene monomer using 3,3'-dimethyl-4,4'-diaminodiphenylmethane(DADPM)as a third comonomer.The polyimide prepared is soluble in common solvents,such as NMP,DMAc,DMF and chloroform.The polyimide films obtained have excellent thermal stability and mechanical property.At the same time,the liquid membrane transport of potassium ions by the new polyimide was investigated,which testified that compared to ODPA-DADPM polyimide,the polyimide containing calix4]arenes has the transport ability to metal ions in regard to bulky,cone-like calix4]arene moieties.