Preparation method of polyvinylidene fluoride hollow fiber ultra-filtration membrane for drinking water treatment

A polyvinylidene fluoride and drinking water treatment technology, applied in the field of hollow fiber membranes, can solve the problems of poor toughness, easy broken wires, and low strength, and achieve the effects of outstanding weather resistance, high retention, and stable performance
CN103638831AActive Publication Date: 2014-03-19奚韶锋
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
奚韶锋
Publication Date
2014-03-19

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Abstract

The invention relates to a preparation method of a polyvinylidene fluoride hollow fiber ultra-filtration membrane for drinking water treatment and belongs to the technical field of membrane separation and drinking water treatment. The preparation method comprises the following steps: respectively drying polyvinylidene fluoride and polyarylene sulfide sulfone in a drying machine; proportionally weighing the polyvinylidene fluoride, the polyarylene sulfide sulfone, tetraglycol, N-methyl-2-pyrrolidinone and polyvinylpyrrolidone, and putting into a stirring kettle for stirring and dissolving to obtain a uniform blended high polymer solution; extruding the uniform blended high polymer solution through a filter and a spinning pump, and then extruding a hollow nascent fiber from an annular opening mold; performing cooling and solidification through a cold extraction solution; soaking into reverse osmosis water to remove a membrane diluent mixture, and performing airing to obtain a hollow fiber ultra-filtration membrane product. According to the hollow fiber ultra-filtration membrane prepared through the method, raw materials are safe, sanitary and environment-friendly, and are high in heat resistance and chemical stability. The polyvinylidene fluoride hollow fiber ultra-filtration membrane is high in retention, stable in performance and suitable for being applied to municipal drinking water treatment, produced water is good in quality, and when the membrane is used, yarns are not broken.
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Description

technical field

[0001] The invention relates to a preparation method of a polyvinylidene fluoride hollow fiber ultrafiltration membrane used for drinking water treatment, in particular to a thermally induced phase separation method (thermal method for short) for preparing polyvinylidene fluoride (PVDF) and polyarylene sulfide A hollow fiber membrane blended with ether sulfone (PASS) is used for municipal drinking water treatment and belongs to the technical field of membrane separation and drinking water treatment. Background technique

[0002] my country's existing water sources are generally polluted by organic matter, and some areas have compound pollution such as high organic matter and high turbidity. The traditional coagulation-sedimentation-filtration-disinfection process has low filtration accuracy, high usage of disinfectants and coagulants, and has a great impact on water quality. The treated water cannot meet the requirements of the new national standard 106 drink...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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