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Polyethylene ion permeable membrane and preparation method thereof

An ion permeable membrane and polyethylene technology, which is applied in semi-permeable membrane separation, chemical instruments and methods, membrane technology, etc. The effect of yield and good wear resistance

Inactive Publication Date: 2009-12-16
JIANGSU EPCOH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a low resistance, small pore size, high porosity, pore Polyethylene ion permeable membrane with uniform distribution, strong puncture resistance, corrosion resistance and oxidation resistance, and clean and pollution-free throughout the production process and its preparation method

Method used

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preparation example Construction

[0030] The invention discloses a preparation method of a polyethylene ion-permeable membrane, which comprises mixing silicon dioxide, polyethylene powder, color masterbatch, filler and antioxidant, and extruding through a twin-screw extruder to shape it.

[0031] A preparation method of polyethylene ion permeable membrane, it comprises the following steps:

[0032] (a). Silicon dioxide: 30-35 parts by weight, polyethylene: 10-15 parts by weight, masterbatch: 1-1.5 parts by weight, filler: 50-55 parts by weight and antioxidant: 0.1-0.2 parts by weight Mix evenly in the mixing system;

[0033] (b). The mixed material is evenly fed to the twin-screw extruder through the feeder. The oiling speed range of the twin-screw extruder is 1.5-1.6L / min. After being pressurized and melted by the twin-screw extruder , discharging through the die head of the twin-screw extruder;

[0034] (c) molding the mixture discharged from the twin-screw extruder by a molding machine and measuring the t...

Embodiment 1

[0038]Mix 210kg of silica, 70kg of polyethylene powder, 7kg of color masterbatch, 350kg of filler and 0.7kg of antioxidant in the mixing system; the mixed material is evenly fed to the twin-screw extruder through the feeder, The main parameters of the twin-screw extruder are the feeding speed of 220kg / hr, the oil pumping speed of 1.8-2.0L / min, the temperature of the first 5 zones of the extruder is 190°C, the temperature of the last 6 zones is 200°C, and the temperature of the 5th zone of the die head is 190°C, the vacuum port pressure is -0.08MPa, pressurized by the twin-screw extruder, the pressure is 3.5MPa-4.2MPa, melted at the temperature of 200-220°C, and then discharged through the die of the twin-screw extruder ;Mold the mixture discharged from the twin-screw extruder by a molding machine and measure the thickness of the formed semi-finished polyethylene ion permeable membrane, so that the total thickness of the formed semi-finished polyethylene ion permeable membrane i...

Embodiment 2

[0042] Mix 245kg of silica, 105kg of polyethylene powder, 10.5kg of color masterbatch, 385kg of filler and 1.4kg of antioxidant in the mixing system; the mixed materials are evenly fed to the twin-screw extruder through the feeder , the main parameters of the twin-screw extruder are feeding speed 220kg / hr, oiling speed 1.8-2.0L / min, temperature in the first 5 zones of the extruder is 190°C, temperature in the last 6 zones is 200°C, temperature in the 5th zone of the die 190°C, the vacuum port pressure is -0.08MPa, pressurized by the twin-screw extruder, the pressure is 3.5MPa-4.2MPa, melted at the temperature of 200-220°C, and then passed through the die of the twin-screw extruder Material; the mixture of the twin-screw extruder output is shaped by a molding machine and the thickness of the formed semi-finished polyethylene ion permeable membrane is measured, so that the total thickness of the formed semi-finished polyethylene ion permeable membrane is 1.0-1.3mm, and the base t...

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Abstract

The invention relates to a polyethylene ion permeable membrane and a preparation method thereof, comprising the following materials by weight part: 30-35 parts of silicon dioxide, 10-15 parts of polyethylene, 1-1.5 parts of color batch, 50-55 parts of stuffing bulking agents, and 0.1-0.2 part of antioxidant; the materials are uniformly mixed in a material mixing system, the mixed material is fed to a double screw extrusion machine uniformly through a discharging machine, and the material is discharged after being pressurized and melted by the double screw extrusion machine; the discharged mixture is formed by a forming machine, the formed semi-finished polyethylene ion permeable membrane is arranged in an oil extractor which is filled with trichloroethylene, so as to carry out oil control to the permeable membrane; the permeable membrane after oil control is carried out is dried, surface-activated, rolled and post-processed for obtaining finished products. The method has the advantages of low electric resistance, small bore diameter, high aperture ratio, uniform pore distribution; the permeable membrane has strong anti-piercing performance, corrosion resisting performance and oxidation resistance, and the whole production process is clean without pollution.

Description

technical field [0001] The invention relates to a polyethylene separator, that is, a PE separator, especially a polyethylene separator with high porosity and good plasticizing effect and a preparation method thereof, specifically a polyethylene ion permeable membrane and its preparation method. Background technique [0002] In flow batteries, industrial batteries, solar energy storage batteries and other energy storage battery products, the polyethylene ion permeable membrane can isolate the positive and negative electrodes of the battery for insulation, inhibit the short circuit of the battery, and ensure the free migration of ions in the electrochemical reaction In the production process of polyethylene separators, that is, PE separators, it is often encountered that the apparent quality of PE separators is qualified, which means that the yield of A-grade coils reaches the standard, but the physical and chemical properties are not up to standard, that is, the quality of PE...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02
Inventor 郑强
Owner JIANGSU EPCOH TECH
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