u00ae polyaniline composite membrane exhibited an electrical conductivity of 10 u2212 3 s cm a water contact angle of 80 to 85 u00b0 and a contact angle of 0 u00b0 for the following solvents n hexane tetrahydrofuran ethanol acetone trichloromethane and toluene to produce the final hydrophobic membrane of example 1 the neutralization process of example 1 was carried out except that 0 5 m potassium sulfate electrolyte solution was used the resulting membrane has a water contact angle of 130 145 u00b0 here the polymerization process of example 4 was carried out except that the second compartment contained 0 3 g p toluenesulfonic acid instead of 1 7 g p toluenesulfonic acid the resulting amphiphilic ptfe nafion u00ae polyaniline composite membrane exhibited an electrical conductivity of 10 u2212 4 s cm a water contact angle of 90 to 95 u00b0 and a contact angle of 0 u00b0 for the following solvents n hexane tetrahydrofuran ethanol acetone trichloromethane and toluene to produce the final hydrophobic membrane of example 1 the neutralization process of example 1 was carried out except that 1 m lithium perchlorate electrolyte solution analytically pure grade from nanjing chemical reagent co ltd of nanjing china was used the resulting membrane has a water contact angle of 130 145 u00b0 a 2 cm u00d7 2 cm ptfe nafion u00ae polyaniline composite membrane produced in accordance.