Abstract: Acid-base composite membranes derived from sulfonated polybenzimidazole (S-PBI) and sulfonated poly(arylene ether sulfone) were prepared via solution blend process. Properties of the membranes were characterized in terms of swelling ratio in methanol aqueous solution，water uptake，methanol permeability coefficient and proton conductivity. Results indicated that the introduction of S-PBI reduced the methanol swelling and methanol permeability coefficient of the membranes. Although the proton conductivity decreased with the addition of S-PBI，the composite membrane showed a relatively high proton conductivity with certain S-PBI content at high temperature. Thus，the composite membranes could be used as proton exchange membranes for direct methanol fuel cell applications.

摘要： 为提高膜的尺寸稳定性和阻醇性能，以磺化聚苯并咪唑（S-PBI）与高磺化度聚醚砜（ABPS）两种聚合物为原料，采用溶液共混的方法，制备了系列酸碱复合质子交换膜。研究了复合膜的甲醇溶胀性、吸水率、甲醇渗透系数、质子传导率随S-PBI含量的变化规律。研究表明，随着S-PBI含量的增加，膜的阻醇性能和尺寸稳定性明显提高；同时，复合膜具有较好的质子传导率，有望应用于直接甲醇燃料电池。