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Method for preparing high-temperature proton exchange membranes based on three-component layer-by-layer self-assembly technology

A technology of layer-by-layer self-assembly and proton exchange membrane, which is applied in the direction of final product manufacturing, sustainable manufacturing/processing, climate sustainability, etc., can solve the problem of single and limited performance adjustable components, and achieve improved proton conductance efficiency, accelerated conduction, and good thermal stability

Active Publication Date: 2021-07-09
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the current research focuses on two components, that is, a single cation and a single anion to prepare membrane materials by layer-by-layer self-assembly. Although the membrane materials show good performance, the controllability of its performance is limited by the single component.

Method used

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  • Method for preparing high-temperature proton exchange membranes based on three-component layer-by-layer self-assembly technology
  • Method for preparing high-temperature proton exchange membranes based on three-component layer-by-layer self-assembly technology
  • Method for preparing high-temperature proton exchange membranes based on three-component layer-by-layer self-assembly technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Add 0.3g of carbon nanotubes (CNTs) into 30mL of CdTe nanocrystal aqueous solution, magnetically stir for 2 hours, and prepare a (CNTs-CdTe) aqueous solution with a mass fraction of 3wt%; wherein, the CdTe nanocrystal Cd The / Te atomic ratio is 5:1, and the concentration of CdTe nanocrystal aqueous solution is 0.879g / L.

[0031] (2) use piranha (piranha) solution (mass fraction 98wt%H 2 SO 4 Aqueous solution: mass fraction 30% H 2 o 2 The mass ratio of the aqueous solution is 7:3), and the negatively charged glass sheet on the surface treated is immersed in a polyurethane (PU) aqueous solution with a mass fraction of 3 wt%, and soaked for 6 minutes;

[0032] (3) Take out the glass sheet, soak it in deionized water for 20 seconds, take it out and blow it until the surface is dry, and soak it in the (CNTs-CdTe) aqueous solution with a mass fraction of 3 wt% prepared in step (1) for 6 minutes;

[0033] (4) Take out the glass sheet, after soaking in deionized water ...

Embodiment 2

[0039] (1) Add 0.3g of carbon nanotubes (CNTs) into 30mL of CdTe nanocrystal aqueous solution, magnetically stir for 2 hours, and prepare a (CNTs-CdTe) aqueous solution with a mass fraction of 3wt%; wherein, the CdTe nanocrystal Cd The / Te atomic ratio is 5:1, and the concentration of CdTe nanocrystal aqueous solution is 0.879g / L.

[0040] (2) use piranha (piranha) solution (mass fraction 98wt%H 2 SO 4 Aqueous solution: mass fraction 30wt% H 2 o 2 The mass ratio of the aqueous solution is 7:3), and the negatively charged glass sheet on the treated surface is immersed in a polyurethane (PU) aqueous solution with a mass fraction of 3 wt%, and soaked for 10 minutes;

[0041] (3) Take out the glass sheet, soak it in deionized water for 20 seconds, take it out and blow it to the surface without water, and soak it in the (CNTs-CdTe) aqueous solution with a mass fraction of 3 wt% prepared in step (1) for 10 minutes;

[0042] (4) Take out the glass flakes, after soaking in deioniz...

Embodiment 3

[0048] (1) Add 0.3g of carbon nanotubes (CNTs) into 30mL of CdTe nanocrystal aqueous solution, magnetically stir for 2 hours, and prepare a (CNTs-CdTe) aqueous solution with a mass fraction of 3wt%; wherein, the CdTe nanocrystal Cd The / Te atomic ratio is 5:1, and the concentration of CdTe nanocrystal aqueous solution is 0.879g / L.

[0049] (2) use piranha (piranha) solution (mass fraction 98wt%H 2 SO 4 Aqueous solution: mass fraction 30wt% H 2 o 2 The mass ratio of the aqueous solution is 7:3), and the negatively charged glass sheet on the treated surface is immersed in a polyurethane (PU) aqueous solution with a mass fraction of 5 wt%, and soaked for 8 minutes;

[0050] (3) Take out the glass sheet, soak it in deionized water for 20 seconds, take it out and blow it until the surface is dry, and soak it in the (CNTs-CdTe) aqueous solution with a mass fraction of 3wt% prepared in step (1) for 8 minutes;

[0051] (4) Take out the glass sheet, after soaking in deionized water...

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Abstract

The invention belongs to the technical field of fuel cells, and in particular relates to a method for preparing a phosphoric acid-doped three-component layer-by-layer self-assembled polymer composite membrane. The glass substrate with a negative charge on the surface is soaked in sequence: in a positively charged polyurethane solution; in a negatively charged cadmium telluride nanocrystal-modified carbon nanotube solution; in a positively charged chitosan solution ; In the carbon nanotube solution modified by negatively charged cadmium telluride nanocrystals, complete 1-layer assembly, repeat the above steps to assemble 100-150 layers, prepare a multi-layer composite film assembled by three components, and then soak in phosphoric acid solution Phosphoric acid-doped multicomponent composite membranes were prepared in . The composite membrane obtained by the invention has the advantages of layer by layer self-assembly structure, good anhydrous proton conductivity, good mechanical properties, stability and the like. Importantly, compared with self-assembly of two sets of layered layers, the composite membrane prepared by the three-component self-assembly system adopted in the present invention has more advantages in terms of property regulation and the like.

Description

technical field [0001] The invention belongs to the field of membrane electrolyte preparation, in particular to a method for preparing a phosphoric acid-doped three-component layer-by-layer self-assembled polymer composite membrane. Background technique [0002] Self-assembly (self-assembly) refers to a technology in which basic structural units (molecules, nanomaterials, micron or larger scale substances) spontaneously form ordered structures. In the process of self-assembly, the basic structural units spontaneously organize or aggregate into a stable aggregate with an ordered structure under the interaction based on non-covalent bonds. The self-assembly technology is simple and easy to operate, no special devices are required, and it has the advantages of molecular-level control of the deposition process and film structure. Layer-by-layer self-assembly technology (layer-by-layer, LBL) is a simple and multifunctional surface modification method developed rapidly in the 199...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/1041H01M8/1067H01M8/1072
CPCH01M8/1041H01M8/1067H01M8/1072Y02E60/50Y02P70/50
Inventor 车全通贾婷婷潘斌孟春祥段向清赵静金瑾申思
Owner NORTHEASTERN UNIV LIAONING
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