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Ultra-hydrophobic processing method for polytetrafluoroethylene thin film

A technology of polytetrafluoroethylene and a processing method, applied in the field of super-hydrophobic processing of polytetrafluoroethylene films, can solve problems such as loss of protection ability, and achieve the effects of low cost, significant economic and social benefits, and simple process

Inactive Publication Date: 2008-06-04
THE QUARTERMASTER EQUIPMENT RESEARCH INSTITUTE OF THE GENERAL LOGISITIC DEPARTME
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] As for the use of PTFE microporous film as a breathable biochemical protective clothing material, since mustard gas and other biochemical warfare agents are oily materials, they can easily penetrate into the material and lose their protective ability. Therefore, a super-hydrophobic PTFE is also needed. film

Method used

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  • Ultra-hydrophobic processing method for polytetrafluoroethylene thin film

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Experimental program
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Effect test

Embodiment 1

[0029] a. Preparation of fluorine-containing surfactant mixture: Dissolve perfluoroethylethylene (meth)acrylate in butanone solvent, and mix with crosslinking agent 2D resin and catalyst magnesium chloride, wherein perfluoroethylethylene The addition amount of vinyl (meth)acrylate is 15% of the mass of butanone, and the addition amounts of crosslinking agent 2D resin and catalyst magnesium chloride are respectively 3% and 0.1% of the mass of butanone.

[0030] b. Pad the polytetrafluoroethylene film with the fluorine-containing surfactant mixture, pre-bake it at 100°C for 2 minutes, and then bake it at 180°C for 2 minutes.

[0031] The surface tension of the PTFE microporous film was changed from that before treatment to 42×10 -3 N / m dropped to 19×10 after treatment -3 N / m.

Embodiment 2

[0033] a. Preparation of fluorosurfactant mixture: Dissolve sodium perfluorooctane sulfonate in methyl ethyl ketone solvent, mix with crosslinking agent melamine resin and catalyst citric acid, wherein the addition of sodium perfluorooctane sulfonate The amount is 50% of the mass of butanone, and the addition amounts of the crosslinking agent melamine resin and catalyst citric acid are respectively 10% and 4% of the mass of butanone.

[0034] b. Pad the polytetrafluoroethylene film with the fluorine-containing surfactant mixture, pre-bake it at 110°C for 3 minutes, and then bake it at 170°C for 3 minutes.

[0035] The surface tension of the PTFE microporous film was changed from that before treatment to 43×10 -3 N / m dropped to 16×10 after treatment -3 N / m.

Embodiment 3

[0037] a. Preparation of fluorosurfactant mixture: Dissolve ammonium perfluorooctane sulfonate and perfluorotriethylamine in methanol solvent, and mix with crosslinking agent EH and catalyst magnesium sulfate, wherein perfluorooctane sulfonate The mass ratio of ammonium nitrate and perfluorotriethylamine is 1:1, the sum of the two is 60% of the methanol mass, and the addition of the crosslinking agent EH and catalyst magnesium sulfate is 4% and 1% of the methanol mass respectively.

[0038] b. Pad the polytetrafluoroethylene film with the fluorine-containing surfactant mixture, pre-bake it at 80°C for 1 minute, and then bake it at 110°C for 10 minutes.

[0039] The surface tension of PTFE microporous film was changed from 38×10 before treatment -3 N / m drops to 15×10 after treatment -3 N / m.

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Abstract

The invention relates to a super-hydrophobic processing method of a polytetrafluoroethylene thin film. The biaxial orientation stretching polytetrafluoroethylene thin film with micro holes is padded into fluorine surfactant mixed liquid and is preheated for 1-10 minutes at 80-150 DEG C and is baked for 1-10 minutes under 110-200 DEG C to prepare the super-hydrophobic polytetrafluoroethylene micro-hole thin film. The super-hydrophobic polytetrafluoroethylene thin film can be widely used in the fields of chemical engineering, energy, environmental protection, medical care, electronic, aviation, protective clothing, etc.

Description

technical field [0001] The invention relates to a superhydrophobic processing method of polytetrafluoroethylene film. The method is to pad the polytetrafluoroethylene film prepared by biaxial stretching with a fluorine-containing surfactant mixture, and then bake it after prebaking to make it superhydrophobic. Hydrophobic properties. It can be used in chemical industry, energy, environmental protection, medical treatment, electronics, aerospace, protective clothing and other fields. Background technique [0002] China is the largest developing country in the world. It is currently in the period of industrialization and has a huge economic scale. Because the production technology and equipment of my country's heavy chemical industry, raw materials, and energy industry are relatively backward, energy consumption is large and pollution is serious. Statistics show that in 1998, the national soot emission amounted to 14.52 million tons. China has nine of the world's ten most a...

Claims

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Application Information

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IPC IPC(8): C08J7/12C08J5/18C08L27/18C08K5/42C08K5/09C08K5/17
Inventor 郝新敏张建春郭玉海
Owner THE QUARTERMASTER EQUIPMENT RESEARCH INSTITUTE OF THE GENERAL LOGISITIC DEPARTME
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