Polyether-ether-ketone porous foam material as well as preparation method and application thereof

The invention provides a polyether-ether-ketone porous foam material as well as a preparation method and application thereof, and belongs to the technical field of ion channel ultrathin foam. The preparation method comprises the following steps: by taking polyether-ether-ketone ultrathin porous foam as a substrate, respectively soaking different polyether-ether-ketone ultrathin porous foams into derivatized polyether-ether-ketone solutions with different concentrations, and then laminating the obtained polyether-ether-ketone ultrathin porous foams to prepare the derivatized polyether-ether-ketone porous foams with different three-dimensional mesoporous channel structures. The derivatized polyether-ether-ketone porous foam has an asymmetric pore structure, uneven chemical composition and asymmetric surface charge distribution, so that the selective strength to ions is different and an ion rectification effect can be generated; the obtained porous foam material has ultrahigh ion rectification performance, and t