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Modified halloysite nanotube for proton exchange membrane and preparation method of modified halloysite nanotube

A technology of halloysite nanotubes and proton exchange membranes, which is applied in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, and can solve problems such as reducing proton conductivity and fuel methanol penetration

Inactive Publication Date: 2016-11-09
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the widely used perfluorosulfonic acid proton exchange membrane has high proton conductivity, there is also a serious problem of fuel methanol permeating from the anode to the cathode.
[0003] Doping inorganic nanoparticles in the proton exchange membrane can improve its alcohol resistance and mechanical stability to a certain extent, but it will reduce the proton conductivity of the membrane.

Method used

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  • Modified halloysite nanotube for proton exchange membrane and preparation method of modified halloysite nanotube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Dissolve 0.5mmol Tris-hydrochloric acid in 50ml deionized water, adjust to pH = 8.5 with 0.01mol / L NaOH, add 2g HNTs and 0.5mmol dopamine hydrochloride, sonicate for 30min, magnetically stir for 4h, centrifuge with deionized water Wash and dry at 30-50°C to obtain D-HNTs;

[0031] In a 50ml three-necked flask, pass argon gas to remove water vapor, add 20ml THF, 1ml triethylamine, 1.5g D-HNTs, 3ml 2-bromo-2-methylpropionyl bromide (BIBB), and stir the reaction for 8h with a magnet, and then use Acetone and methanol aqueous solution with a volume fraction of 50% were ultrasonically cleaned, dried at 30-50°C to obtain Br-HNTs;

[0032] In a 50ml three-neck flask, pass argon to remove the air, add 10ml N-N dimethylformamide (DMF), 10ml deionized water, 40mmol NaSS, 2mmol CuBr, 2mmol CuBr 2 , 2mmol hexamethyltriethylenetetramine, 1.5g Br-HNTs, magnetically stirred and reacted for 24h, followed by ultrasonic centrifugation with acetone and methanol aqueous solution with a vo...

Embodiment 2

[0035] Dissolve 0.5mmol Tris-hydrochloric acid in 50ml deionized water, adjust to pH=8.5 with 0.01mol / L NaOH, add 2g halloysite and 0.5mmol dopamine hydrochloride in sequence, ultrasonicate for 30min, and magnetically stir for 10h, wash and dry Get D-HNTs;

[0036] In a 50ml three-necked flask, pass argon gas to remove water vapor, add 20ml THF, 1ml triethylamine, 1.5g D-HNTs, 3ml BIBB, stir the reaction for 24 hours with a magnet, wash and dry to obtain Br-HNTs;

[0037] In a 50ml three-neck flask, pass argon gas to remove the air, add 10ml DMF, 10ml deionized water, 40mmol NaSS, 2mmol CuBr, 2mmol CuBr 2 , 2mmol of hexamethyltriethylenetetramine, 1.5g of Br-HNTs, stirred by a magnet for 48 hours, washed and dried to obtain NaSS-modified halloysite nanotubes NaSS-HNTs.

[0038] The above-mentioned NaSS-modified halloysite nanotubes were doped into the proton exchange membrane and tested for its proton conductivity. The results are shown in Table 1. The film forming process i...

Embodiment 3

[0040] Dissolve 0.5mmol Tris-hydrochloric acid in 50ml deionized water, adjust the pH to 8.5 with 0.01mol / L NaOH, add 2g halloysite and 0.5mmol dopamine hydrochloride in sequence, ultrasonicate for 30min, and stir for 4h with a magnet, after washing and drying Get D-HNTs;

[0041] In a 50ml three-necked flask, pass argon gas to remove water vapor, add 20ml THF, 1ml triethylamine, 1.5g D-HNTs, 3ml BIBB in sequence, stir the reaction for 8 hours with a magnet, wash and dry to obtain Br-HNTs;

[0042] In a 50ml three-neck flask, pass argon gas to remove the air, and then add 10ml DMF, 10ml deionized water, 40mmol AMPS, 2mmol CuBr, 2mmol CuBr 2 , 2mmol hexamethyltriethylenetetramine, 1.5g Br-HNTs, magnetically stirred and reacted for 24h, washed and dried to obtain AMPS-modified halloysite nanotube AMPS-HNTs.

[0043] The above-mentioned AMPS-modified halloysite nanotubes were doped into the proton exchange membrane and tested for its proton conductivity. The results are shown in...

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Abstract

The invention relates to a modified halloysite nanotube for a proton exchange membrane and a preparation method of the modified halloysite nanotube. The method comprises the steps of carrying out surface coating treatment on the halloysite nanotube through dopamine hydrochloride, introducing active halogen atoms, and grafting and polymerizing a monomer with a sulfonic acid group into the halloysite nanotube through ATRP reaction to obtain the modified halloysite nanotube. The monomer with the sulfonic acid group is grafted and polymerized into the halloysite nanotube to introduce the sulfonic acid group; and the modified halloysite nanotube and a sulfonated polymer electrolyte are doped to prepare the composite proton exchange membrane with high proton conductivity and stable mechanical property.

Description

technical field [0001] The invention belongs to the technical field of organic modification of inorganic nanoparticles, in particular to a modified halloysite nanotube used for proton exchange membranes and a preparation method thereof. Background technique [0002] The proton exchange membrane is one of the core components of the fuel cell. It is responsible for the dual role of conducting protons and separating the anode and cathode, and plays a decisive role in the operation of the fuel cell. Although the widely used perfluorosulfonic acid proton exchange membrane has high proton conductivity, there is also a serious problem of fuel methanol permeating from the anode to the cathode. [0003] Doping inorganic nanoparticles in the proton exchange membrane can improve its alcohol inhibition performance and mechanical stability to a certain extent, but it will reduce the proton conductivity of the membrane. Contents of the invention [0004] Aiming at the deficiencies of t...

Claims

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Application Information

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IPC IPC(8): H01M8/1016B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M8/1016Y02E60/50Y02P70/50
Inventor 林俊郏慧娜刘山新刘鑫白福军何少剑
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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