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A kind of preparation method of polytetrafluoroethylene porous membrane modified compound

A polytetrafluoroethylene and porous membrane technology is applied in the field of preparation of polytetrafluoroethylene porous membrane modified composites, which can solve the problems of poor compatibility and adhesion, limited application of microporous membranes, and poor wetting performance. , to achieve good uniform distribution, excellent proton conductivity and strength, and ensure uniformity.

Active Publication Date: 2018-06-08
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the disadvantages of PTFE, such as low surface energy, poor wettability, poor compatibility and adhesion with other materials, limit the application of microporous membranes.

Method used

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  • A kind of preparation method of polytetrafluoroethylene porous membrane modified compound
  • A kind of preparation method of polytetrafluoroethylene porous membrane modified compound

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Experimental program
Comparison scheme
Effect test

Embodiment 3～6

[0032] Preparation of Modified Aromatic Hydrocarbon and Polytetrafluoroethylene Porous Membrane Modified Composite

[0033] Put the aromatic hydrocarbon particles into the 1,2-dichloroethane solution and dissolve at a temperature of 40°C to 80°C, and the dissolution time is 12h to 37h; a certain concentration of H 2 SO 4 The solution is added to the solution obtained above to react; the insoluble matter obtained in the above solution is washed to neutrality with deionized water, and then dried; the dried obtained matter is dissolved in a dimethylacetamide (DMAc) solution; the obtained The resulting solution was brush-coated on a polytetrafluoroethylene porous membrane and tested after drying.

[0034] The specific parameters are shown in Table 1.

[0035] Table 1

[0036]

Embodiment 7

[0038] The composite sheets of modified aromatic hydrocarbon and polytetrafluoroethylene porous membrane prepared in Comparative Example 1, Comparative Example 2, and Examples 3-6 were tested for proton conductivity and tensile strength, respectively. The test results are shown in Table 2. The proton conductivity test method is in accordance with GB / T20042.3-2009 and the tensile strength is in accordance with the method described in GB / T1040.3-2006.

[0039] Table 2 Thin film proton conductivity and tensile strength test

[0040]

[0041] As can be seen from Table 2, the compound of modified aromatic hydrocarbon and polytetrafluoroethylene porous membrane has significant proton conduction ability to membrane proton conduction, so that the hydrogen protons produced by the anode (negative pole) can directly pass through the proton exchange membrane to reach the cathode (positive pole), and electrons can only reach the cathode through an external circuit. When electrons flow...

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Abstract

The invention discloses a preparation method of a polytetrafluoroethylene porous membrane modified compound. A preparation method of a polytetrafluoroethylene porous membrane modified composition, comprising modified aromatic hydrocarbons and fluorocarbon resins, wherein the modified aromatic hydrocarbon mixed solution is composed of aromatic hydrocarbon particles, 1,2-dichloroethane, sulfuric acid, dimethyl Diacetamide (DMAc) composition. Compared with the prior art in the preparation method of the polytetrafluoroethylene porous membrane modified compound provided by the present invention, the amount of the modified aromatic hydrocarbon brushed is not more than 10-40% of the weight ratio of the composition with high proton conductivity In the case of , the effect of excellent proton conductivity and strength can be achieved.

Description

technical field [0001] The invention relates to a preparation method of a polytetrafluoroethylene porous membrane modified compound, which belongs to the field of polymer materials. Background technique [0002] A fuel cell (FC) is a device that directly converts the chemical energy between a hydrogen fuel and an oxidant into electrical energy through an electrode reaction. In recent years, with the extensive development and application of proton exchange membrane fuel cells (PEMFC) in high-tech fields such as transportation, electronic products, and aerospace. Proton Exchange Membrane (PEM, Proton Exchange Membrane) is the core component of the proton exchange membrane fuel cell, its function is to conduct protons, and at the same time separate the fuel of the anode from the oxidant of the cathode, its performance is directly related to the fuel cell performance and lifespan. The development of proton exchange membranes has roughly gone through the process from perfluorin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/40C08L27/18
Inventor 蔡芳昌刘娟马宁蒋涛
Owner HUBEI UNIV