Blending modified hollow polysulfone fiber film, preparation method and application thereof

Abstract

The invention relates to a blending modified hollow polysulfone fiber film which comprises the following components in percentage by weight: 3-40 percent of polysulfone, 0.5-20 percent of porogen, 50-90 percent of organic solvent and 0.5-20 percent of inorganic nano particles, wherein the inorganic nano particles are one or the mixture of more than two of silicon oxide nano particles, titanium oxide nano particles, silicon carbide nano particles and gamma-phase aluminium oxide nano particles; the viscosity-average molecular weight of the polysulfone is 40,000-200,000; the organic solvent is one of N-methyl-2-pyrrolidone, dimethyl acetamide or dimethyl sulfoxide; and the porogen is one or a mixture of any two of polyvinylpyrrolidone, polyethylene glycol and polyvinyl alcohol. The invention improves the surface property, the hydrophilic property and the mechanical strength of the film through modifying the hollow polysulfone fiber film, has simple film preparation process, and can realize industrial mass production.

Description

technical field [0001] The invention relates to a blended modified polysulfone hollow fiber membrane and its preparation method and application, belonging to the technical field of hollow fiber membranes. Background technique [0002] The current hemodialyzer uses a wide variety of materials. Polysulfone has good biocompatibility, high mechanical strength, acid and alkali resistance, heat resistance, bacterial and microbial erosion resistance, excellent oxidation resistance, and high solute permeability. The medium molecular toxin removal rate is high, the residual blood volume is small, the price is cheap, and the prepared hollow fiber membrane has good water permeability and separation performance, and is one of the most commonly used membrane materials at present. However, polysulfone is a strongly hydrophobic material, and the pore size and pore size distribution of the prepared membrane are difficult to control, which seriously limits its application. In order to impro...

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Problems solved by technology

The above methods all introduce a certain number of active groups and improve the hydrophilic properties of the membrane to a certain extent, but the activation method is relatively complicated and does not consider the internal structure of the membrane after formation.

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