Method for manufacturing porous membrane and porous membrane
AssigneeFUJIFILM Corporation
InventorAkihiro IKEYAMA
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Abstract
The present invention provides a method for manufacturing a porous membrane having high water permeability and hydrophilicity, which is not easily affected by a treatment such as washing, the method including: preparing, as a substrate, a membrane having a plurality of pores, which includes a water-insoluble resin such as polysulfone and a water-soluble resin including a monomer unit of polyvinylpyrrolidone or a monomer unit of polyvinyl alcohol; and irradiating the substrate with an electron beam in the presence of an aqueous solvent to crosslink at least a part of the water-soluble resin.
Claims20
A method for manufacturing a porous membrane, comprising:
- preparing, as a substrate, a membrane having a plurality of pores, which includes a water-insoluble resin and a water-soluble resin including a monomer unit of polyvinylpyrrolidone or a monomer unit of polyvinyl alcohol;
- and
- irradiating the substrate with an electron beam in the presence of an aqueous solvent to crosslink at least a part of the water-soluble resin, which further comprises
- in the preparation of the substrate, casting a solution including the water-insoluble resin and the water-soluble resin on a support to form the membrane having a plurality of pores on the support.
A porous membrane comprising:
- a water-insoluble resin;
- and
- a water-soluble resin including a monomer unit of polyvinylpyrrolidone or a monomer unit of polyvinyl alcohol,
- wherein an insoluble component in a case where 60 cm2 of the porous membrane is immersed in 50 mL of methylene chloride for 24 hours is 0.5% by mass or more of a dry mass of the porous membrane before the immersion, and
- the porous membrane has a layered compact portion with a minimum pore diameter inside the membrane.
Dependencies are inferred from the claim text.