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CNT@Fe3O4@C modified polymer hybrid proton exchange membrane and preparation method thereof

A proton exchange membrane and polymer technology, applied in the field of polymer hybrid proton exchange membrane and its preparation, can solve the problems of hybrid membrane proton conductivity enhancement, limited, low effectiveness, etc., to achieve a good industrial production basis, broad Application prospect, low production cost effect

Active Publication Date: 2017-03-29
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional loading methods can only make 1D materials randomly and randomly disperse in the matrix of the hybrid membrane. Many proton conduction paths in the hybrid membrane are actually ineffective or have low effectiveness. Therefore, the protons of the hybrid membrane The increase in conductivity is relatively limited

Method used

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  • CNT@Fe3O4@C modified polymer hybrid proton exchange membrane and preparation method thereof
  • CNT@Fe3O4@C modified polymer hybrid proton exchange membrane and preparation method thereof
  • CNT@Fe3O4@C modified polymer hybrid proton exchange membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Prepare 10 mL of 10 mg / mL CNT-COOH / acetone dispersion; then, add 100 mg of ferrocene, and disperse evenly; then, add 1 mL of 30 wt% hydrogen peroxide solution, and mix evenly; place the above system at 210°C After 24 h, let it cool naturally, and finally wash with ethanol-centrifugation to collect the product CNT@Fe 3 o 4 @C. figure 1 (A) for CNT@Fe 3 o 4 TEM image of @C, it can be seen that Fe 3 o 4 @C is randomly and uniformly adsorbed on the CNTs, thereby forming composite nanoparticles with an overall 1D shape. CNT@Fe 3 o 4 @C has good magnetic responsiveness ( figure 1 (B / C)).

[0024] Take 5 mL of commercially available Nafion solution, remove about half of the solvent by rotary evaporation, add 2.5 mL N,N-dimethylformamide, and continue rotary evaporation for 10 min; add 0.5 wt of Nafion polymer equivalent to the above Nafion solution %CNT@Fe 3 o 4 @C, Ultrasound for 1 h to disperse evenly; carefully pour the dispersion into a mold and quickly place i...

Embodiment 2

[0028] Prepare 10 mL of 10 mg / mL CNT-COOH / acetone dispersion; then, add 75 mg of ferrocene, and disperse evenly; then, add 1 mL of 30 wt% hydrogen peroxide solution, and mix evenly; place the above system at 210°C for 24 After h, let it cool down naturally, and finally wash with ethanol-centrifugation to collect the product CNT@Fe 3 o 4 @C.

[0029] Take 5 mL of commercially available Nafion solution, remove about half of the solvent by rotary evaporation, add 2.5 mL N,N-dimethylformamide, and continue rotary evaporation for 10 min; add 0.5 wt of Nafion polymer equivalent to the above Nafion solution %CNT@Fe 3 o 4 @C, Ultrasound for 1 h to disperse evenly; carefully pour the dispersion into a mold and quickly place it in an oven at 70 °C, apply a uniform 0.3 T magnetic field in the film thickness direction, and start from 70 °C for 2 h After that, the temperature was slowly raised to 120°C to remove the solvent; vacuum was applied, and the temperature of the vacuum oven wa...

Embodiment 3

[0031] Prepare 10 mL of 10 mg / mL CNT-COOH / acetone dispersion; then, add 50 mg of ferrocene, and disperse evenly; then, add 1 mL of 30 wt% hydrogen peroxide solution, and mix evenly; place the above system at 210°C for 24 After h, let it cool down naturally, and finally wash with ethanol-centrifugation to collect the product CNT@Fe 3 o 4 @C.

[0032] Take 5 mL of commercially available Nafion solution, remove about half of the solvent by rotary evaporation, add 2.5 mL N,N-dimethylformamide, and continue rotary evaporation for 10 min; add 0.5 wt of Nafion polymer equivalent to the above Nafion solution %CNT@Fe 3 o 4 @C, Ultrasound for 1 h to disperse evenly; carefully pour the dispersion into a mold and quickly place it in an oven at 70 °C, apply a uniform 0.3 T magnetic field in the film thickness direction, and start from 70 °C for 2 h After that, the temperature was slowly raised to 120°C to remove the solvent; vacuum was applied, and the temperature of the vacuum oven wa...

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Abstract

The invention belongs to the technical field of membranes, and particularly relates to a CNT@Fe3O4@C modified polymer hybrid proton exchange membrane and preparation method thereof. The method comprises the step that one-dimensional (1D) type CNT@Fe3O4@C is uniformly dispersed into a polymer matrix in an oriented mode by means of a magnetic field, and the oriented CNT@Fe3O4@C modified polymer hybrid proton exchange membrane is obtained, wherein the proton conductivity of the proton exchange membrane is obviously improved compared with a pure polymer hybrid proton exchange membrane and is higher than the proton conductivity of a non-oriented CNT@Fe3O4@C modified polymer hybrid proton exchange membrane. Meanwhile, the fuel blocking capacity of the hybrid proton exchange membrane is further improved through orientation arrangement of CNT@Fe3O4@C. Accordingly, the oriented CNT@Fe3O4@C modified polymer hybrid proton exchange membrane has more excellent selectivity. The method is simple in operation process, mild in preparation condition, low in production cost and prone to batched and large-scale production and has a wide application prospect.

Description

technical field [0001] The invention belongs to the field of membrane technology, in particular to an aligned carbon nanotube@Fe 3 o 4 @C complex (CNT@Fe 3 o 4 @C) Modified polymer hybrid proton exchange membrane and preparation method thereof. Background technique [0002] Fuel cells (FC) have excellent properties such as high energy conversion rate, no pollution, wide range of fuel sources, and low noise, and have gradually become one of the most competitive alternative power sources for internal combustion engines. Direct methanol fuel cells (DMFCs), the sixth generation of FCs, have attracted extensive academic and industrial attention with the additional advantages of mild operating conditions, high energy density, long lifetime, and no need for fuel pretreatment devices. Proton exchange membrane (PEM) is one of the core components of DMFC, and optimizing its performance plays a vital role in the development of high-performance DMFC. On the one hand, the PEM separa...

Claims

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Application Information

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IPC IPC(8): C08J5/22C08K3/04C08K3/22C08K7/24C08K9/12C08L27/18H01M8/1039H01M8/0221
CPCC08J5/2237C08J5/225C08J2327/18C08K3/04C08K3/22C08K7/24C08K9/12C08L2203/16C08L2203/20H01M8/1023C08L27/18Y02E60/50Y02P70/50
Inventor 孙华圳冯凯汤蓓蓓武培怡
Owner FUDAN UNIV
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