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Material capable of resisting high corrosion and seepage and production method of material

A production method and penetration-resistant technology, which is applied in the field of new materials with strong corrosion resistance and penetration resistance, can solve the problems of difficult compounding of graphite-resin composite materials, and achieve the effects of excellent thermal conductivity and excellent corrosion resistance

Active Publication Date: 2015-04-15
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 strong corrosion-resistant and permeation-resistant material that makes graphite and fluororesin tightly composited to obtain corrosion resistance and permeation resistance and its production method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Preparation of graphite material modifier:

[0028] The graphite material modifier is an aqueous solution, including 3% of chromic acid, 2% of phosphoric acid, 5% of sodium dodecylsulfonate, 2% of sodium laurate and the rest of water, and the above amounts are percentages by mass.

[0029] As a graphite material modifier, it has the following characteristics, which can effectively improve the composite degree between PTFE resin and graphite: chromic acid and phosphoric acid react with the graphite surface to enhance the hydrophilicity of the graphite surface. However, sodium dodecylsulfonate and sodium laurate are used as surfactants, and their hydrophilic ends are more likely to combine with the hydrophilic graphite surface. After the combination, the affinity between the graphite surface and the polytetrafluoroethylene resin is significantly improved. strengthen.

[0030] (2) Modification of graphite substrate:

[0031] Heat the graphite substrate to more than 2...

Embodiment 2

[0037] (1) Preparation of graphite material modifier:

[0038] The graphite material modifier is an aqueous solution containing 5% of chromic acid, 10% of phosphoric acid, 3% of sodium dodecylsulfonate, 5% of sodium laurate and the rest of water.

[0039] As a graphite material modifier, it has the following characteristics, which can effectively improve the composite degree between PTFE resin and graphite: chromic acid and phosphoric acid react with the graphite surface to enhance the hydrophilicity of the graphite surface. However, sodium dodecylsulfonate and sodium laurate are used as surfactants, and their hydrophilic ends are more likely to combine with the hydrophilic graphite surface. After the combination, the affinity between the graphite surface and the polytetrafluoroethylene resin is significantly improved. strengthen.

[0040] (2) Modification of graphite substrate:

[0041] Heat the graphite substrate to more than 250 degrees Celsius to completely remove the mo...

Embodiment 3

[0047] (1) Preparation of graphite material modifier:

[0048] The graphite material modifier is an aqueous solution, including 5% chromic acid, 2% phosphoric acid, 5% sodium dodecylsulfonate, 5% sodium laurate and the rest of water.

[0049]As a graphite material modifier, it has the following characteristics, which can effectively improve the composite degree between PTFE resin and graphite: chromic acid and phosphoric acid react with the graphite surface to enhance the hydrophilicity of the graphite surface. However, sodium dodecylsulfonate and sodium laurate are used as surfactants, and their hydrophilic ends are more likely to combine with the hydrophilic graphite surface. After the combination, the affinity between the graphite surface and the polytetrafluoroethylene resin is significantly improved. strengthen.

[0050] (2) Modification of graphite substrate:

[0051] Heat the graphite substrate to more than 250 degrees Celsius to completely remove the moisture and oil...

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Abstract

The invention discloses a material capable of resisting high corrosion and seepage and a production method of the material. The material is formed by compositing a material, modified by a graphite material modifier, with a polytetrafluoroethylene emulsion. The production method comprises the steps of preparation of the graphite material modifier, modification treatment of a graphite base material, compositing of graphite and resin, resin plasticizing and the like. The material obtained by using the production method can resist the corrosion of highly-corrosive media such as concentrated sulfuric acid, concentrated nitric acid and hydrofluoric acid, and the seepage pressure resistance strength can reach 1.0 MPa. According to a technology, the compositing capacity of polytetrafluoroethylene and the graphite can be greatly improved, and the strength of a graphite material is not reduced. Since the material has excellent heat conduction performance of the graphite, has excellent corrosion resistance of polytetrafluoroethylene resin and can resist certain seepage pressure, the composite material can be widely applied to manufacturing of chemical anticorrosion equipment made of the 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, PTFE can also be used ...

Claims

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Application Information

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IPC IPC(8): C08L27/18C08K9/04C08K9/02C08K3/04
CPCC08K3/04C08K9/02C08K9/04C08L27/18
Inventor 高翔冯曦冯圣君窦振新施忠
Owner NANTONG SUNSHINE GRAPHITE EQUIP TECH
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