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Ethylene-chlorotrifluor ethylene copolymer microporous separation membrane, preparation method and application thereof

A technology of chlorotrifluoroethylene and copolymer, which is applied in the direction of semipermeable membrane separation, chemical instruments and methods, membrane technology, etc., can solve the serious pollution of waste liquid, the mechanical strength of the membrane cannot meet the needs of actual production, and the cost of waste liquid treatment Higher problems, achieve the effect of low porosity, excellent resistance to strong alkali and strong acid, high mechanical strength

Inactive Publication Date: 2019-01-29
ZHEJIANG RES INST OF CHEM IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mechanical strength of the polymer separation membrane prepared in the above prior art cannot meet the actual production requirements under the premise of obtaining a certain pure water flux, and in the process of preparing the membrane, the waste liquid pollution is serious and waste liquid treatment is difficult. high cost

Method used

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  • Ethylene-chlorotrifluor ethylene copolymer microporous separation membrane, preparation method and application thereof
  • Ethylene-chlorotrifluor ethylene copolymer microporous separation membrane, preparation method and application thereof
  • Ethylene-chlorotrifluor ethylene copolymer microporous separation membrane, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Weigh ethylene-trifluorochloroethylene copolymer 620g, tris(2,4-di-tert-butylphenyl) phosphite 10g, first diluent diphenyl carbonate 670g and second diluent diethyl phthalate Ester 700g. First, use a ball mill to grind diphenyl carbonate, and then use a kneader to mix ethylene-chlorotrifluoroethylene, ground diphenyl carbonate and tris(2,4-di-tert-butylphenyl)phosphite evenly to obtain Solid mixed material, then solid material is added in the extruder by artificial feeding mode, and feed rate is 18g / min, and diethyl phthalate is joined in the extruder, and feed rate is 9.7g / min, finally The extruder screw is completely melted and extruded at 210°C, the die temperature is set at 197°C, and the core liquid is a mixed solution of 80°C mass fraction of 90% ethylene glycol and mass fraction of 10% glycerol, and then The extruded membrane filaments were cooled in a water bath at 55°C to form a film, wound and wound, and finally immersed in water-washed ethanol for extraction...

Embodiment 2

[0046] Weigh ethylene-trifluorochloroethylene copolymer 620g, tris(2,4-di-tert-butylphenyl) phosphite 10g, first diluent diphenyl carbonate 670g and second diluent diethyl phthalate Ester 700g. First, use a ball mill to grind diphenyl carbonate, and then use a kneader to mix ethylene-chlorotrifluoroethylene, ground diphenyl carbonate and tris(2,4-di-tert-butylphenyl)phosphite evenly to obtain Solid mixed material, then solid material is added in the extruder by artificial feeding mode, and feed rate is 18g / min, and diethyl phthalate is joined in the extruder, and feed rate is 9.7g / min, finally Extrude through the extruder screw at 210°C to completely melt and extrude, the die head temperature is set to 197°C, the core liquid is a diethyl phthalate solution at 80°C, and then the extruded film filament is placed in a water bath at 55°C Cooling to form a film, winding and winding, and finally immersing the film filament in ethanol washed with water for extraction to obtain an et...

Embodiment 3

[0048] Weigh 676g of ethylene-chlorotrifluoroethylene copolymer, 10g of tris(2,4-di-tert-butylphenyl)phosphite, 730g of diphenyl carbonate as the first diluent, dimethyl phthalate as the second diluent Esters 584g. Wherein the first diluent diphenyl carbonate is ground using a ball mill, and ethylene-chlorotrifluoroethylene, the first diluent diphenyl carbonate and tris (2,4-di-tert-butylphenyl) phosphite are mixed using a kneader Mix evenly to obtain a solid mixture, then add the solid mixture and the second diluent dimethyl phthalate into the extruder through manual feeding, and completely melt and extrude through the extruder screw at 220 ° C. The die head temperature at 200°C, with nitrogen as the core fluid, the extruded membrane filaments are cooled in a 55°C water bath to form a film and wound and wound, and finally the membrane filaments are immersed in ethanol washed with water for a period of time to obtain ethylene-chlorotrifluoroethylene copolymer microporous sepa...

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Abstract

The present invention provides an ethylene-chlorotrifluor ethylene copolymer microporous separation membrane. A multiphase blend system composed of polymer ethylene-chlorotrifluor ethylene, a heat stabilizer and diluent is used as the membrane forming system, and the ECTFE microporous separation membrane is prepared by thermally induced phase separation (TIPS). The membrane possessed both high strength and high throughput characteristics. In the process of preparation, the waste liquor pollution is less, the preparation cost is low and the environmental protection performance is good. The invention also provides a preparation method of the ethylene-chlorotrifluor ethylene copolymer microporous separation membrane. The prepared ethylene-chlorotrifluor ethylene copolymer microporous separation membrane is suitable for zero discharge of high concentration wastewater from textile and dyeing industries, recovery of organic solvents and alkali liquor, filtration of etchant in microelectronics industry, separation and purification of antibiotics, decolorization of syrup, membrane distillation and water vapor separation.

Description

technical field [0001] The invention belongs to the field of polymer membrane materials, and in particular relates to an ethylene-chlorotrifluoroethylene copolymer microporous separation membrane and a preparation method and application thereof. Background technique [0002] Due to its advantages of high efficiency, energy saving, simple equipment and operation, and environmental friendliness, membrane separation technology has always attracted the attention of scholars and industry departments, and has gradually replaced or improved many traditional filtration processes. Fluoropolymers have become one of the indispensable synthetic materials for cutting-edge technology because of their excellent high temperature resistance, chemical resistance, oxidation resistance, insulation and non-combustibility. Using fluorine-containing materials as raw materials to prepare polymer membranes that can perform separation processes in harsh environments has also become a hot research dir...

Claims

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Application Information

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IPC IPC(8): B01D71/32B01D69/06B01D69/08B01D67/00C02F1/44
CPCB01D67/0009B01D69/06B01D69/08B01D71/32C02F1/44C02F1/447
Inventor 高林娜刘慧吁苏云代哲振张艳中
Owner ZHEJIANG RES INST OF CHEM IND CO LTD
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