A highly porous,high-strength,ultrathin nonwoven PET fabric with uniform thickness was prepared as a supporting material for polymer electrolyte membranes in the use of wet paper-making and hot-pressing processes. The experiments first optimized the mass ratio of support fibers (SF) to binder fibers (BF) at 6:4. By optimizing the dispersion process,a well-dispersed PET short fiber slurry was prepared. The slurry was then sheeted to produce base paper with a thickness deviation of±5 μm. The study then examined in detail the effects of hot-pressing temperature and pressure on the final product's thickness,porosity,tensile strength,and air permeability. It was found that the mechanical strength of the nonwoven fabric was negatively correlated with its porosity and air permeability. After balancing the process parameters,an ultrathin,high-strength wet method PET nonwoven fabric was produced,achieving a tensile strength greater than 40 MPa,porosity over 40％,and thickness below 20 μm. In addition,the optimized high-strength wet-processed PET non-woven fabric was combined with polymer electrolyte to form a polymer electrolyte membrane,which exhibits excellent electrochemical performance.
关键词
湿法PET无纺布/PET短纤/电解质支撑层/聚合物固态电解质膜
Key words
wet-processed PET non-woven fabric/PET short fibers/polymer electrolyte support layers/polymer solid electrolyte membrane
维普
万方数据