Polymer-based fibrous filtration materials are widely used

however

the development of high-temperature filtration application using engineering thermoplastics are limited by the difficulty of wet spinning and fiber refinement. In this paper

a nanofibrous membrane was prepared by electrospinning using the high performance engineering polymer polyetherketoneketone (PEKK)

which can be dissolved in trifluoroacetic acid. And the regulation laws of the fiber diameter and morphology were investigated

as well as its characteristics for high temperature filtration application. The study shows that: the average diameter of the fiber can be refined to 87 nm

the pore size of the fiber membrane can be reduced to 293 nm

and the tensile strength can reach 7.77 MPa; the fiber membrane shows excellent filtration performance with the filtration efficiency of higher than 99.9% at a thickness of 6 μm; the fiber membrane maintains a good morphological structure

force

thermal properties

and high-temperature air filtration properties at 300 °C.