Method for preparing carbon nanotube reinforced anion exchange membrane through coaxial electrostatic spinning

A technology of coaxial electrospinning and anion exchange membrane, which is applied in the field of electrochemical engineering, can solve problems such as difficulty in improving compatibility, and achieve the effects of improving compatibility, increasing ion conductivity, and increasing doping amount

Active Publication Date: 2018-10-09
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Doping inorganic materials such as graphene, carbon nanotubes, etc., can further improve the mechanical strength and alkali stability of the membrane, such as J.Membr.Sci.487 (2015) 99 doping graphene oxide in quaternized polysulfone, However, there are problems such as difficulty in improving the compatibility between organic / inorganic components

Method used

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  • Method for preparing carbon nanotube reinforced anion exchange membrane through coaxial electrostatic spinning
  • Method for preparing carbon nanotube reinforced anion exchange membrane through coaxial electrostatic spinning
  • Method for preparing carbon nanotube reinforced anion exchange membrane through coaxial electrostatic spinning

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Dissolving 1.5g of imidazolized polysulfone with an ion exchange capacity of 1.61mmol / g in 6.0g of N,N-dimethylformamide is prepared into a solution with a mass fraction of 20% as a shell spinning solution; Add 9.0 mg of functionalized carbon nanotubes to the shell spinning solution to make the mass fraction 0.6%, and disperse evenly after magnetic stirring for 12 hours and ultrasonic dispersion for 30 minutes to serve as the core spinning solution. When the applied voltage is 24kV, the distance between the coaxial spinneret and the receiving drum is 15cm, the diameter of the core layer of the coaxial spinneret is 500μm, the diameter of the shell layer is 1500μm, and the pushing speed of the core layer and the shell layer injection pump is 0.06ml / h, under the spinning condition that the rotating speed of the drum is 1500rpm, the coaxial electrospun nanofibers arranged in a three-dimensional network are prepared, and the fiber diameter is 100-300nm.

[0026] Place the c...

Embodiment 2

[0029] 1.0g ion exchange capacity is 1.5mmol / g imidazole polysulfone is dissolved in 4.56g of N, N-dimethylformamide, the solution that is mixed with mass fraction is 18%, as shell spinning liquid; Add 4.0 mg of functionalized carbon nanotubes to the shell spinning solution to make the mass fraction 0.4%, and disperse evenly after magnetic stirring for 12 hours and ultrasonic dispersion for 30 minutes to serve as the core spinning solution. When the applied voltage is 27kV, the distance between the coaxial spinneret and the receiving drum is 15cm, the diameter of the core layer of the coaxial spinneret is 500μm, and the diameter of the shell layer of the coaxial spinneret is 1500μm. Under the spinning conditions of 0.09ml / h and drum rotation speed of 1500rpm, coaxial electrospun nanofibers arranged in a three-dimensional network were prepared, and the fiber diameter was 50-350nm.

[0030] Place the coaxial electrospun fibers in the saturated steam above the N,N-dimethylformami...

Embodiment 3

[0033] 0.5g ion exchange capacity is 1.65mmol / g imidazole polysulfone dissolved in 1.77g of N, N-dimethylformamide, the solution that the mass fraction is 22% is formulated, as shell spinning liquid; 4.0 mg of functionalized carbon nanotubes were added to the shell spinning solution to make the mass fraction 0.8%, and after magnetic stirring for 12 hours and ultrasonic dispersion for 30 minutes, they were uniformly dispersed as the core spinning solution. When the applied voltage is 30kV, the distance between the coaxial spinneret and the receiving drum is 15cm, the diameter of the core layer of the coaxial spinneret is 500μm, the diameter of the shell layer of the coaxial spinneret is 1500μm, and the pushing speed of the inner and outer axis injection pumps is equal. Under the spinning conditions of 0.12ml / h and drum speed of 1500rpm, coaxial electrospun nanofibers arranged in a three-dimensional network are prepared, and the fiber diameter is 100-400nm.

[0034] Place the co...

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Abstract

The invention belongs to the technical field of electrochemical engineering, and relates to a method for preparing a carbon nanotube reinforced anion exchange membrane through coaxial electrostatic spinning. Functionalized carbon nanotubes are fixed to the inside of nanofiber by using coaxial electrostatic spinning, and the dense membrane with three-dimensional network morphology is prepared through solvent steam bath, hot pressing and hydroxyl ion exchange. The functionalized carbon nanotubes are fixed to the inside of the nanofiber and are oriented in the axial direction of the nanofiber, and an imidazole functional group on the surface promotes aggregation of ion clusters in the membrane. Therefore, compatibility of organic / inorganic components is effectively enhanced, the doping amountof the carbon nanotubes is improved, and the hydroxyl ion conductivity, mechanical strength and water-resistant swelling resistance of the membrane are remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of electrochemical engineering, and relates to a method for preparing a carbon nanotube reinforced anion exchange membrane by coaxial electrostatic spinning. Background technique [0002] Anion-exchange membrane fuel cells are a new generation of fuel cells. Compared with proton-exchange membrane fuel cells, they have the advantages of high oxygen reduction reaction activity and low permeability of methanol and other fuels. The anion exchange membrane selectively permeates hydroxide ions and is one of the core components that determine the performance and life of a fuel cell. At present, the main problems of anion exchange membranes are low ion conductivity, water swelling resistance, poor stability of hot alkali, etc., which limit their commercial application. [0003] Scholars from various countries have carried out extensive research on the above key issues. J.Membr.Sci.522(2017)267 uses block, grafted ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/42D01D5/00D01F8/16D01F8/18D06M11/38D06M101/30
CPCD01D5/003D01F8/16D01F8/18D04H1/42D06M11/38D06M2101/30
Inventor 吴雪梅贺高红王乾峰宫雪姜晓滨杨寅帅苑倩倩梁山张楠李甜甜王小舟高莉王茜
Owner DALIAN UNIV OF TECH
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