Abstract:The inorganic material tetrabutyl titanate (TBT) was uniformly incorporated into quaternized chitosan(QCS), to prepare inorganic-organic hybrid membranes.The structure and morphology of sample membranes were analyzed by FT-IR and SEM, then the performance including mechanical properties, water uptake, ion exchange capacity and conductivity were tested. The membranes were impregnated in 3 mol/L and 6 mol/L NaOH solution to inspect the influence of alkali stability at different concentration and different time, and to discuss the feasibility of electrolyte membranes in fuel cell. The results show that the mechanical properties increase with increase of the TBT content, but the water uptake, ion exchange capacity (IEC) and conductivity of the hybrid membranes decrease. The other properties of membranes after alkali treatment are lower than those of the corresponding untreated membranes, except the water uptake is increased, the changed rate is not more than 5%. The conductivity retention decreases with rising of the temperature and NaOH content in some extent, but all remain above 90%, and no apparent change in appearance, indicating that the membranes have good alkali resistance.