Cellulose nanofibers were embedded into sulfonated poly (ether sulfone) matrix to heighten the water retention and proton conductivity of proton exchange membranes (PEMs). Cellulose nanofibers were obtained by hydrolyzing cellulose acetate nanofibers, which were prepared via electrostatic-induction-assisted solution blow spinning. Morphology, thermal stability, and mechanical properties of the PEMs were investigated. The results showed that proton conductivity, water uptake, and methanol permeability of the composite membranes were improved. Hydrophilicity of the composite membranes was gradually improved with the addition of nanofibers. When the content of nanofibers was 5 wt%, the highest proton conductivity was 0.13 S/cm (80 °C, 100% RH). Therefore, the cellulose nanofiber could be used as support materials to enhance the performance of proton exchange membranes, the composite membranes have potential application in Direct methanol fuel cells (DMFCs).

将纤维素纳米纤维嵌入磺化的聚（醚砜）基质中，以提高质子交换膜（PEMs）的保水性和质子传导性。通过水解乙酸纤维素纳米纤维获得纤维素纳米纤维，所述乙酸纤维素纳米纤维是通过静电感应辅助溶液吹纺法制备的。研究了PEM的形态，热稳定性和机械性能。结果表明，复合膜的质子电导率，吸水率和甲醇渗透率均得到改善。随着纳米纤维的加入，复合膜的亲水性逐渐提高。当纳米纤维的含量为5wt％时，最高质子传导性为0.13S / cm（80℃，100％RH）。所以，