SEPARATION MEMBRANE AND METHOD FOR PRODUCING SAME

SEPARATION MEMBRANE AND METHOD FOR PRODUCING SAME

For the purpose of providing a separation membrane which is excellent in terms of low fouling properties, separation performance and water permeability, while having high chemical resistance, a separation membrane according to the present invention comprises a porous resin layer that contains a poly...

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Hauptverfasser: NISHIGUCHI, Yoshiki, KATO, Satoshi
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
METALLURGY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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creator NISHIGUCHI, Yoshiki
KATO, Satoshi
description For the purpose of providing a separation membrane which is excellent in terms of low fouling properties, separation performance and water permeability, while having high chemical resistance, a separation membrane according to the present invention comprises a porous resin layer that contains a polymer which is mainly composed of a polyvinylidene fluoride resin, and this separation membrane is configured such that: with respect to the porous resin layer, the number A of pores having a surface pore diameter of not less than 0.01 μm but less than 0.05 μm and the number B of pores having a surface pore diameter of 0.05 μm or more satisfy the relational expression 2.0 ≤ A/B ≤ 15.0; and the void fraction of macrovoids having a breadth of 10 μm or more in a region from the surface to the depth of 15 μm of the porous resin layer is from 15% to 80%.
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subjects CHEMISTRY
METALLURGY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
title SEPARATION MEMBRANE AND METHOD FOR PRODUCING SAME
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