Patent ID: 7108935

Claim:
A method for the preparation of a proton conducting composite membrane material based on the following steps: a) preparation of layered particles of zirconium phosphate of the general formula Zr(O 3 POH) 2 or zirconium phosphate sulfoarylene phosphonate in the form of a mixture of small and large dies by exfoliation of the phosphates in aqueous solution by intercalation-deintercalation of an alkylamine, b) preparation of a colloidal dispersion of the layered particles in a suitable organic solvent or mixture of organic solvents, c) transferring of the layered particles from the said colloidal dispersion to a solution of a polymer by mixing, d) forming membrane materials with oriented particles by using the obtained mixture and eliminating the solvent; wherein the particles are exfoliated to a thickness from ca. 5 nm to 100 nm.