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Polyamide membrane with proton conduction property, and preparation method thereof

A technology of proton conduction and polyamide membrane, which can be used in home appliances, flat products, climate sustainability, etc. It can solve the problems of no proton conduction ability, and achieve the effect of low cost and simple operation

Inactive Publication Date: 2014-01-08
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the existing research on modification mainly focuses on improving the solubility of polyamide, improving heat resistance and flame retardancy, and reducing the dielectric constant of polymers. report

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation of the polymer film adopts the method of solution casting to form a film. A certain amount of polyamide is weighed in a beaker, and N, N-dimethylacetamide (DMAc) is added to prepare a polymer solution with a mass fraction of 8 wt%. In a flat watch glass, bake in an oven at 90°C for 25 hours, and wait until the solvent is completely evaporated to prepare a polymer film with a thickness of 104 μm. The obtained polymer film was immersed in 2M phosphoric acid aqueous solution for 48 hours to prepare a phosphoric acid-doped polyamide film, and its proton conductivity was measured by an electrochemical workstation, which was 5.97×10 -3 .

Embodiment 2

[0026] The preparation of the polymer film adopts the method of solution casting to form a film. Weigh a certain amount of polyamide in a beaker, add N-methylpyrrolidone (NMP) to prepare a polymer solution with a mass fraction of 5 wt%, and pour it into a flat watch glass. in an oven at 110°C for 15 hours until the solvent was completely evaporated to obtain a polymer film with a thickness of 50 μm. The obtained polymer film was immersed in 6M phosphoric acid aqueous solution for 20 hours to prepare a phosphoric acid-doped polyamide film, and its proton conductivity was measured by an electrochemical workstation to be 4.97×10 -2 .

Embodiment 3

[0028] The preparation of the polymer film adopts an industrial extrusion film production method, and a certain amount of polyamide is extruded by twin-screws and cast into a film, and the thickness of the film is 150 μm. The obtained polymer film was soaked in 10M phosphoric acid aqueous solution for 100 hours to prepare a phosphoric acid-doped polyamide film, and its proton conductivity was measured by an electrochemical workstation to be 8.74×10 -2 .

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Abstract

The invention belongs to modification of polyamide membranes, relates to a preparation of a functional polyamide membrane, and in particular relates to a polyamide membrane with proton conduction property, and a preparation method thereof, namely, an acid-doping modified polyamide membrane with proton conduction property, and a preparation method thereof. The polyamide membrane with proton conduction property is of a phosphoric acid or sulfuric acid-doping polyamide membrane and has a continuous and uniform porous structure, and the proton conductivity of the polyamide membrane with proton conduction property is 1.92*10<-3>-8.74*10<-2>.S.cm<-1>. The preparation method of the polyamide membrane with proton conduction property comprises the steps of preparing polyamide into a membrane with the thickness of 50-150mu m, and doping phosphoric acid and sulfuric acid into a polymer membrane, and leading the polymer membrane to obtain the proton conduction capability. The polyamide membrane after being acid-doped has higher proton conductivity; and the preparation method is simple to operate, and has no special requirements on equipment, thus having lower cost.

Description

technical field [0001] The invention belongs to the modification of polyamide membranes, and relates to the preparation of a functional polyamide membrane, in particular to a polyamide membrane with proton conductivity and a preparation method thereof, in particular to a modified polyamide membrane by acid doping. Permanent polyamide membrane with proton conductivity and its preparation method. Background technique [0002] Problems such as energy shortage and continuous deterioration of the ecological environment are serious challenges to the development of the world economy. Therefore, it is becoming increasingly necessary and urgent to develop new energy sources with high energy efficiency and environmental friendliness. As a clean, efficient, and safe new energy source, fuel cells have attracted widespread attention, and have shown good market development prospects. Among them, the proton exchange membrane fuel cell is favored because of its high energy density, low env...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/02H01M2/16B29D7/01H01M8/0239H01M8/1018H01M8/1069
CPCY02E60/12Y02E60/50Y02P70/50
Inventor 李光谢娟江建明
Owner DONGHUA UNIV
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