A preparation method of high temperature resistant fluoropolymer microporous material

A microporous material, high temperature resistant technology, applied in the field of polymer microporous material preparation, can solve environmental hidden dangers, limit the large-scale application of fluoropolymers, etc., to increase porosity, improve dissolution and diffusion capacity, reduce The effect of melt viscosity

Active Publication Date: 2016-05-18
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two methods all use a large amount of organic solvents as diluents or dissolving agents, which limits the large-scale application of fluoropolymers in biomedicine, blood treatment, drinking water purification, etc. There are environmental hazards

Method used

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  • A preparation method of high temperature resistant fluoropolymer microporous material
  • A preparation method of high temperature resistant fluoropolymer microporous material
  • A preparation method of high temperature resistant fluoropolymer microporous material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Step 1: Mix 1700g polyperfluoroethylene propylene, 50g nano-calcium carbonate, and 250g boron nitride fiber in a high-mixer to obtain a mixture.

[0032] Step 2: Turn on the heating system of the twin-screw extruder, heat up and preheat for 2 hours, and the processing temperature is as follows:

[0033]

[0034] Step 3: Feed the mixture into the first zone of the twin-screw extruder at a speed of 5kg / h. After being transported and melted and plasticized in the first two zones, add supercritical carbon dioxide with a temperature of 60°C and a pressure of 10MPa in 3.5ml The speed of / min is injected into the barrel in the third zone.

[0035] Step 4: Under the action of high temperature, high pressure and strong shear force, supercritical carbon dioxide and polymer form a co-fusion system. By adjusting the melt pump, the pressure behind the pump reaches 14.6MPa, and the head quickly releases the pressure.

[0036]Step 5: Extrude through the die, form in a pure water b...

Embodiment 2

[0039] Step 1: Mix 750g polyperfluoroethylene propylene, 30g polytetrafluoroethylene, 10g zinc oxide, 140g sodium chloride and 70g polyethylene oxide in a high mixer to obtain a mixture.

[0040] Step 2: Turn on the heating system of the twin-screw extruder, heat up and preheat for 2 hours, and the processing temperature is as follows:

[0041]

[0042] Step 3: Feed the mixture into the first zone of the twin-screw extruder at a speed of 3.5kg / h. After being conveyed in the first two zones and melted and plasticized, supercritical carbon dioxide with a temperature of 60°C and a pressure of 10MPa is fed in 2ml The speed of / min is injected into the barrel in the third zone.

[0043] Step 4: Under the action of high temperature, high pressure and strong shear force, the supercritical carbon dioxide and the polymer form a co-fusion system. By adjusting the melt pump, the pressure behind the pump reaches 5.8MPa, and the head pressure reaches 12.5MPa, and the pressure is quickly...

Embodiment 3

[0047] Step 1: Mix 740g polyfluoroethylene propylene, 50g polyether ketone ketone, 10g zinc oxide, 140g boron nitride fiber, 50g polyvinylpyrrolidone and 10g triethyl phosphate in a high mixer.

[0048] Step 2: Turn on the heating system of the twin-screw extruder, heat up and preheat for 2 hours, and the processing temperature is as follows:

[0049]

[0050] Step 3: Feed the mixed material into the first zone of the twin-screw extruder at a speed of 5kg / h. After being transported and melted and plasticized in the first two zones, supercritical carbon dioxide with a temperature of 60°C and a pressure of 10MPa is fed at a rate of 3ml / The speed of min is injected into the barrel in the third zone.

[0051] Step 4: Under the action of high temperature, high pressure and strong shear force, supercritical carbon dioxide and polymer form a co-fusion system. By adjusting the melt pump, the pressure in front of the pump reaches 5.8MPa, and the head pressure reaches 12.5MPa, and t...

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Abstract

The invention discloses a preparation method of a high-temperature-resisting fluorine-containing polymer cellular material. The preparation method comprises the following steps of uniformly mixing fluorine-containing polymer, micro-phase separation induction polymer, a pore-foaming agent and an auxiliary induction agent at a high speed, carrying out extrusion molding on the mixture through a supercritical-double-screw extruder film forming system to obtain a primary cellular material, immersing the primary cellular material in a coagulating bath, drawing and stretching the primary cellular material at a given speed, and soaking the primary cellular material in a washing bath to be oscillated and washed to obtain the high-temperature-resisting fluorine-containing polymer cellular material. The supercritical carbon dioxide is used as a plasticizing additive of the system, so that the melt viscosity of the fluorine-containing polymer can be reduced, and the processing temperature of the fluorine-containing polymer can be at least reduced by 20 DEG C; the supercritical carbon dioxide is used as green solvent, so that a great amount of organic solvent can be avoided, the problem of the prepared cellular material has no solvent residual can be avoided, and the environmental pollution can be avoided.

Description

technical field [0001] The invention relates to a preparation technology of a polymer microporous material, in particular to a preparation method of a high temperature resistant fluorine-containing polymer microporous material. Background technique [0002] my country clearly pointed out in the Twelfth Five-Year Plan that high-performance membrane materials as new materials are one of the seven strategic emerging industries and have been included in the 863 major projects. Compared with traditional polymer porous membranes, fluoropolymer microporous materials have some performance advantages, mainly including chemical corrosion resistance, high temperature resistance, radiation resistance, electrical insulation and mechanical strength, etc. Therefore, fluoropolymers It is widely used in the fields of blood treatment, organic liquid filtration, filtration and purification of oxidizing reagents, oil-water separation and insulation of wires and cables. Fluoropolymers mainly in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/18C08L71/02C08L61/16C08L39/06C08L77/00C08L79/08C08J9/30C08J9/26B29C47/92B29C48/92
CPCB29B7/46B29B7/72B29B7/7461B29B7/90B29C48/08B29C48/40B29C48/92B29C2948/92514B29C2948/926B29C2948/92704B29C2948/92828
Inventor 刘富薛立新沈剑辉林海波向艳慧王益
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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