Thermally conductive polytetrafluoroethylene film with porous structure and preparation method thereof

A polytetrafluoroethylene film and a polytetrafluoroethylene technology are applied in the field of thermally conductive polytetrafluoroethylene film and its preparation, and can solve the problems of unfavorable industrial production, poor product use effect, complex process and the like

Active Publication Date: 2021-02-23
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The document "Wang Yonghu, etc., graphene oxide-polytetrafluoroethylene nanocomposite materials and properties" describes that the PTFE powder is soaked in the graphene oxide (kOG) dispersion modified with the silane coupling agent KH550, and after stirring and dispersing , the solid is dried, molded, sintered, cut and polished to obtain a composite material, but this method first uses powder, and graphene oxide needs to be modified, and the finished product also needs complex processing to obtain the final product. Finished products, the use effect of the final product is not good, and the process is complicated, which is not conducive to industrial production

Method used

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  • Thermally conductive polytetrafluoroethylene film with porous structure and preparation method thereof
  • Thermally conductive polytetrafluoroethylene film with porous structure and preparation method thereof
  • Thermally conductive polytetrafluoroethylene film with porous structure and preparation method thereof

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Effect test

Embodiment 1

[0034]A method for preparing a thermally conductive polytetrafluoroethylene film material having a porous structure, comprising the steps of:

[0035]Step 1: A polypropylene nonwoven fabric is bonded to the polytetrafluoroethylene film by hot pressing.

[0036]Step 2: The polytetrafluoroethylene film of the polypropylene nonwoven fabric is bonded in the oxygen plasma treatment step 1, and the treatment time is 300s;

[0037]Step 3: Soak the polytetrafluoroethylene film after plasma treatment in anhydrous ethanol for 240 min;

[0038]Step 4: Add the graphene dispersion to distilled water, stir mix, and tested for 60 min, and prepared a graphene immersion liquid having a concentration of 0.4%, and the diameter of graphene was 10-100 nm;

[0039]Step 5: Soaked the polytetrafluoroethylene membrane in anhydrous ethanol to the prepared graphene dispersion, soaking time is 30 min;

[0040]Step 6: Take out the soaked polytetrafluoroethylene film and dry the finished product at 100 ° C.

Embodiment 2

[0042]A method for preparing a thermally conductive polytetrafluoroethylene film material having a porous structure, comprising the steps of:

[0043]Step 1: A polypropylene nonwoven fabric is bonded to the polytetrafluoroethylene film by hot pressing.

[0044]Step 2: The polytetrafluoroethylene film of the polypropylene nonwoven fabric is bonded in the oxygen plasma treatment step 1, and the treatment time is 300s;

[0045]Step 3: Soak the polytetrafluoroethylene film after plasma treatment in anhydrous ethanol for 120 min;

[0046]Step 4: Add the graphene dispersion to distilled water, stir mix, and tested for 30 min, and prepared a concentration of 0.6% graphene soaking solution, graphene diameter of 10-100 nm;

[0047]Step 5: Soak the polytetrafluoroethylene membrane soaked in absolute ethanol into the prepared graphene dispersion for 10 minutes;

[0048]Step 6: Take out the soaked PTFE membrane and directly dry it at 100°C.

Embodiment 3

[0050]The preparation method of a thermally conductive polytetrafluoroethylene film material with a porous structure includes the following steps:

[0051]Step 1: Laminate the polypropylene non-woven fabric to the polytetrafluoroethylene film by hot pressing;

[0052]Step 2: Use oxygen plasma to treat the polytetrafluoroethylene film laminated with polypropylene non-woven fabric in step 1, and the treatment time is 300s;

[0053]Step 3: Soak the plasma-treated PTFE membrane in absolute ethanol for 100 minutes;

[0054]Step 4: Add the graphene dispersion to distilled water, stir and mix, and ultrasonically treat for 30 minutes to prepare a graphene soaking solution with a concentration of 0.1%, the diameter of the graphene is 10-100nm;

[0055]Step 5: Immerse the polytetrafluoroethylene membrane soaked in absolute ethanol into the prepared graphene dispersion for 60 minutes;

[0056]Step 6: Take out the soaked PTFE membrane and directly dry it at 150°C.

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Abstract

The invention discloses a method for preparing a thermally conductive polytetrafluoroethylene film with a porous structure, belonging to the field of functional materials, comprising the following steps: 1: laminating polypropylene non-woven fabric to the polytetrafluoroethylene film by hot pressing; 2: adopting oxygen Plasma treatment of polytetrafluoroethylene film; 3: soaking polytetrafluoroethylene film in absolute ethanol; 4: preparing graphene soaking solution; 5: soaking polytetrafluoroethylene film in graphene dispersion; 6: putting The soaked PTFE membrane was taken out and dried. The polytetrafluoroethylene film modified by graphene in the present invention is a thin, tough, easy-folding, and good-toughness novel photoevaporation film material. The preparation method is simple, easy to operate, low in cost, and suitable for large-scale commercial production.

Description

Technical field[0001]The present invention belongs to the field of composite, and more particularly to a thermally conductive polytetrafluoroethylene film having a porous structure and a preparation method thereof.Background technique[0002]Freshwater shortages have become one of the most serious global challenges today. Therefore, how to efficiently produce freshwater into problems needed, and use solar production fresh water is considered an economic approach to solving this problem. Rich solar energy makes solar dilute seawater and wastewater treatment into one of the most promising technologies, and it is also a hot spot study. The traditional solar purification water processor does not solve the problem of dirt, and other key disadvantages include heating the entire volume of water, regular cleaning accumulated pollutants, and collecting sufficient sunlight. The broad land area required. In recent years, high-efficiency solar evaporation has been realized by floating structures,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B37/06B32B37/10B32B38/08B32B38/16B32B27/32B32B27/12B32B27/02B32B3/24C08J7/12C08L27/18
Inventor 陈军王霄倪海鹰
Owner SICHUAN UNIV
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