NANOFILAMENT-COATED MEMBRANES WITH HIERARCHICAL POROUS STRUCTURES, IN PARTICULAR FOR MEMBRANE DISTILLATION, AND METHODS FOR PREPARING THE SAME

    公开(公告)号:EP4209261A1

    公开(公告)日:2023-07-12

    申请号:EP22150541.5

    申请日:2022-01-07

    摘要: The invention relates to nanofilament-coated membranes with hierarchical porous structures comprising a microporous polymer support membrane having through-going pores with a nominal pore diameter in the range from 0.2 µm to 50 µm and a superhydrophobic fluorine-free nanoporous layer having through-going pores with a nominal pore diameter in the range from 5 nm to 200 nm provided on said support membrane and comprising or consisting of a porous network of polysiloxane nanofilaments.
    In more specific embodiments of said nanofilament-coated porous membranes, the microporous support membrane comprises or consists of a polymer which is selected from the group consisting of polyethersulfone (PES), cellulose acetate (CA), polypropylene (PP), polyamide (nylon), polytetrafluoroethylene (PTFE), polyvinyl difluoride (PVDF) or polyethylene (PE).
    A second aspect of the invention relates to the use of these nanofilament-coated porous membranes for membrane distillation, in particular in a process of desalination of saline or distillation of contaminated water or extraction of water from waste water or extraction of other volatile components from a feed solution and to a device, in particular a membrane distillation device, comprising these nanofilament-coated porous membranes.
    A further aspect of the invention relates to a method for preparing these nanofilament-coated porous membranes.