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Composite material of two-component fluororesin and graphite and preparation method thereof

A composite material and fluororesin technology, applied in the direction of fibrous fillers, etc., can solve the problems of graphite-resin composite materials, such as the difficulty of graphite-resin composite materials, and achieve the effects of excellent corrosion resistance, improved composite degree, and excellent thermal conductivity

Active Publication Date: 2016-02-03
NANTONG SUNSHINE GRAPHITE EQUIP TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing graphite-resin composite material is difficult to combine by impregnation, and to provide a composite material of two-component fluororesin and graphite that makes graphite and fluororesin tightly composited and is resistant to corrosion and penetration. and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Pretreatment of graphite substrate:

[0025] Heat the graphite substrate to ≥ 250 degrees Celsius, completely remove the moisture and oil in the graphite, and use high-pressure air to completely remove the floating dust on the surface of the graphite substrate, and then set it aside.

[0026] (2) Preparation of two-component fluororesin

[0027] The weight percent of polyvinyl alcohol resin in the two-component fluororesin is 5%, and the rest is polytetrafluoroethylene dispersion emulsion. The fluororesin and polyvinyl alcohol resin are placed in a container, fully stirred, mixed evenly, and statically It can be used after ≥48 hours.

[0028] (3) Compounding of graphite and resin:

[0029] Put the graphite workpiece into the impregnation tank, and keep a distance of 3~5mm between the graphite parts. Vacuuming, reaching 133.32×10 -3 After Pa, stop vacuuming. Immediately inhale the two-component fluororesin liquid, after the liquid level is 5~10mm higher than the...

Embodiment 2

[0033] (1) Pretreatment of graphite substrate:

[0034] Heat the graphite substrate to ≥ 250 degrees Celsius, completely remove the moisture and oil in the graphite, and use high-pressure air to completely remove the floating dust on the surface of the graphite substrate, and then set it aside.

[0035] (2) Preparation of two-component fluororesin

[0036] The percentage by weight of polyacrylamide resin in the two-component fluororesin is 25%, and the rest is polytetrafluoroethylene dispersion emulsion. Put the fluororesin and polyacrylamide resin in a container, fully stir, mix evenly, and statically It can be used after ≥48 hours.

[0037] (3) Compounding of graphite and resin:

[0038] Put the graphite workpiece into the impregnation kettle, and keep a distance of 3~5mm between the graphite parts. Vacuuming, reaching 133.32×10 -3 After Pa, stop vacuuming. Immediately inhale the two-component fluororesin liquid, after the liquid level is 5~10mm higher than the graphite...

Embodiment 3

[0042] (1) Pretreatment of graphite substrate:

[0043] Heat the graphite substrate to ≥ 250 degrees Celsius, completely remove the moisture and oil in the graphite, and use high-pressure air to completely remove the floating dust on the surface of the graphite substrate, and then set it aside.

[0044] (2) Preparation of two-component fluororesin

[0045] The percentage by weight of polyvinylpyrrolidone resin in the two-component fluororesin is 40%, and the rest is polytetrafluoroethylene dispersion emulsion. The fluororesin and polyvinylpyrrolidone resin are placed in a container, fully stirred, mixed evenly, and It can be used after standing for ≥48 hours.

[0046] (3) Compounding of graphite and resin:

[0047] Put the graphite workpiece into the impregnation kettle, and keep a distance of 3~5mm between the graphite parts. Vacuuming, reaching 133.32×10 -3 After Pa, stop vacuuming. Immediately inhale the two-component fluororesin liquid, after the liquid level is 5~10m...

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Abstract

The invention discloses a composite material of bicomponent fluororesin and graphite and a preparation method thereof. The composite material is compounded from a graphite material and bicomponent fluororesin as raw materials. The production method comprises the following steps: pretreatment of a graphite substrate; preparation of the bicomponent fluororesin; compounding of graphite and resin; resin plasticization and the like. The material obtained by the method can tolerate corrosion of a strong corrosive medium such as concentrated sulfuric acid, concentrated nitric acid, hydrofluoric acid and the like; the osmotic stress resistance strength can be up to 1.0MPa and adjustable; the composite material has excellent heat-conducting property of the graphite, has excellent corrosion resistance of the fluororesin, and can tolerate certain osmotic pressure. The composite material can be widely applied to manufacturing of chemical anticorrosive equipment of graphite.

Description

technical field [0001] The invention relates to a new material with strong corrosion resistance and penetration resistance, mainly a new penetration resistance composite graphite material capable of withstanding strong acid corrosion and a production method thereof. Background technique [0002] Graphite material has good heat transfer performance, corrosion resistance, and machinability, and is an ideal material for chemical anti-corrosion equipment. However, since graphite material has 10-30% through-hole voids, it must be impregnated with some impregnating agents to fill the voids before it can be used. in equipment manufacturing. Due to the limitation of the corrosion resistance of the impregnating agent itself, graphite materials impregnated with ordinary resins (such as phenolic and furan resins) cannot withstand strong corrosive acids such as nitric acid, hydrofluoric acid, and concentrated sulfuric acid. Due to its strong chemical stability, polytetrafluoroethylene ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/46C04B41/48
Inventor 高翔冯曦冯圣君窦振新施忠
Owner NANTONG SUNSHINE GRAPHITE EQUIP TECH
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