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Tetrafluoroemulsion composition, waterproof breathable film and preparation method thereof

A technology of waterproof and breathable film and PTFE emulsion, which is applied in the field of PTFE emulsion composition, can solve the problems of unsatisfactory waterproof and breathable effect of waterproof and breathable layer, omission or volatilization of air electrode electrolyte, carbonation of electrolyte, etc., and achieve excellent Mechanical properties, avoid volatilization, and prolong service life

Active Publication Date: 2016-04-13
江西小氧人供氧设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the waterproof and breathable effect of the current waterproof and breathable layer is not ideal, and the mechanical strength is poor, which easily leads to the leakage or volatilization of the electrolyte in the air electrode, and the carbonation of the electrolyte, which limits its application.

Method used

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  • Tetrafluoroemulsion composition, waterproof breathable film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A waterproof and breathable membrane, composed of: 75 parts of tetrafluoroemulsion, 6 parts of conductive powder, and 60 parts of silicone rubber, wherein the mass concentration of the tetrafluoroemulsion is 60%.

[0023] Weigh the tetrafluoroemulsion, conductive powder and silicone rubber in proportion, mix and stir, and add absolute ethanol to break the emulsification to make the materials evenly mixed. The mass ratio of tetrafluoroemulsion to ethanol is 75:8; control in the rubber mixer The temperature is 100°C, and the film is formed by rolling repeatedly, and the thickness of the film is controlled to 300μm.

Embodiment 2

[0025] The difference between this embodiment and embodiment 1 is that the composition of the waterproof and breathable membrane of this embodiment includes: 50 parts of tetrafluoroemulsion, 7 parts of conductive powder, and 35 parts of silicone rubber. The mass concentration is 60%.

Embodiment 3

[0027] The difference between this embodiment and embodiment 1 is that the composition of the waterproof and breathable membrane of this embodiment includes: 70 parts of tetrafluoroemulsion, 10 parts of conductive powder, and 55 parts of silicone rubber. The mass concentration is 60%.

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Abstract

The invention provides a tetrafluorine emulsion composition comprising 45-75 parts of tetrafluorine emulsion, 6-12 parts of conductive powder and 30-60 parts of silicon rubber, wherein the mass concentration of the tetrafluorine emulsion is 60%. The invention further provides a waterproof and breathable membrane obtained by repeated rolling membrane formation of the tetrafluorine emulsion composition in a rubber mixing mill. The waterproof and breathable membrane prepared from the tetrafluorine emulsion composition has excellent mechanical performance, waterproof performance and breathable performance, and can be used for effectively solving the problems of leakage or volatilization of an air electrode electrolyte, carbonation of the electrolyte and the like, greatly improving the working efficiency of an air electrode and prolonging the service life of the air electrode.

Description

Technical field [0001] The invention relates to a tetrafluoroethylene emulsion composition, and also relates to a waterproof and breathable membrane and a preparation method thereof. Background technique [0002] The air electrode refers to an electrode where air participates in the electrode reaction, such as a hydrogen electrode and an oxygen electrode. The gas molecules and the corresponding ions in the solution accept electrons on the inert metal between the gas / liquid phase, thereby establishing the equilibrium of the electrode reaction. [0003] At present, the air electrode is mainly composed of a current collector, a catalytic layer, and a waterproof layer. Among them, the catalytic layer is prepared by mixing activated carbon, catalyst, acetylene black and polytetrafluoroethylene solution with ethanol and water to form a slurry, then coating it on foamed nickel, and then drying it, or by combining activated carbon, The catalyst, acetylene black and polytetrafluoroethylen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/18C08L83/04C08K3/08C08K3/22
Inventor 曾福生
Owner 江西小氧人供氧设备有限公司