Preparation method of polysulphone hollow fiber film

Abstract

The invention discloses a preparation method of a polysulfone hollow fiber membrane, which belongs to the field of material preparation. It is characterized in that it includes raw materials polysulfone, dimethylacetamide, polyethylene glycol and bovine serum albumin; after drying polysulfone in vacuum, it is fully mixed with polyethylene glycol and solvent dimethylacetamide, stirred and dissolved, and vacuum-dried. Degassing, after the film casting solution is degassed, it passes through the spinneret to form a fine spinning stream, passes through the air gap between the spinneret and the coagulation water bath and immerses in the coagulation water bath, and passes through the solvent dimethylacetamide and non-solvent water. Mass transfer exchange to form a film. Through the optimization of the process and parameters in the preparation process, the finger-shaped pores of the prepared fiber membrane are suppressed, the porosity is effectively reduced, and the tensile strength is improved. The comprehensive performance of the hollow fiber membrane prepared by the method of the present invention is greatly improved. Improvement, the preparation method is simple in process, easy to operate, and suitable for popularization and use in related fields.

Description

technical field [0001] The invention belongs to the field of material preparation, in particular to a method for preparing polysulfone hollow fiber membranes. Background technique [0002] In the field of thin film technology, polysulfone has excellent film-forming properties and mechanical properties, and can withstand high temperature, hydrolysis, acid and alkali corrosion, so it is often used to prepare ultrafiltration membranes, nanofiltration membranes and reverse osmosis membranes. It is used in sewage treatment, drug purification, seawater desalination, hemodialysis and other fields, effectively alleviating environmental pollution, energy and resource crises and other issues. The permeability and rejection performance of polysulfone membrane depend on the cross-sectional structure and membrane material of the membrane. Regulating the cross-sectional structure of polysulfone membrane is one of the means to effectively control the membrane performance. The control of ...

AI Technical Summary

Problems solved by technology

However, the polysulfone membrane made of high molecular weight polyethylene glycol and polyvinylpyrrolidone has the disadvantages of poor surface quality, low strength, and difficulty in making membranes, which limits its industrial production.