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A kind of preparation method of acid-base double-layer core-shell nanotube/speek composite proton exchange membrane

A proton exchange membrane and nanotube technology, which is applied in the field of nanocomposite membrane preparation, can solve the problems of easy water loss and poor mechanical properties, and achieve good dimensional stability, moderate water absorption and swelling, and high proton conductivity. Effect

Active Publication Date: 2022-03-22
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The invention not only overcomes the problems that the SPEEK membrane is easy to lose water under high temperature and low humidity or is easy to swell in water, resulting in poor mechanical properties, but also ensures that the composite PEM has the advantages of high proton conductivity, high water retention, and good dimensional stability.

Method used

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  • A kind of preparation method of acid-base double-layer core-shell nanotube/speek composite proton exchange membrane
  • A kind of preparation method of acid-base double-layer core-shell nanotube/speek composite proton exchange membrane
  • A kind of preparation method of acid-base double-layer core-shell nanotube/speek composite proton exchange membrane

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Embodiment 1

[0048] step 1)

[0049] PEEK was selected as the matrix material, and the reaction conditions were regulated by the control variable method to prepare SPEEK with a suitable sulfonation degree. The specific steps are: weigh 7g of PEEK pellets, slowly dissolve it in 125ml of concentrated sulfuric acid at room temperature, after complete dissolution, keep it in a water bath at 50°C for 8 hours, slowly pour the reaction solution into the ice-water mixture, and wash the product with water After reaching neutrality, air-dry for 48 hours, then vacuum-dry at 60°C for 24 hours to obtain sulfonated PEEK.

[0050] In order to measure the sulfonation degree of SPEKK, the sulfonation degree of SPEEK was calculated by NMR method. The hydrogens corresponding to different positions on the SPEEK structural unit are respectively represented by H a , H a ’, H b , H b’ , H c , H d , H d’ ,H e , H f , H f’ To identify. Each repeating unit has 12 hydrogens, H c The position on the benz...

Embodiment 2

[0065] Doping amount is the preparation of 5% acid-base double-layer core-shell nanotube / SPEEK composite proton exchange membrane, its implementation steps are the same as step (5) in example 1, the difference is that 0.016gDSNT-A@ B was changed to 0.04g DSNT-A@B and added to DMF (5mL), the prepared composite film was called SPEEK / DSNT-A@B-5, and the average thickness of the obtained composite film was 60 to 80 μm.

Embodiment 3

[0067] The doping amount is the preparation of acid-base double-layer core-shell nanotube / SPEEK composite proton exchange membrane. gDSNT-A@B was added to DMF (5 mL), and the prepared composite film was called SPEEK / DSNT-A@B-8, and the average thickness of the obtained composite film was 60 to 80 μm.

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Abstract

The invention relates to a method for preparing an acid-base double-layer core-shell nanotube / SPEEK composite proton exchange membrane. The method prepares acid-base double-shell nanotubes through a continuous two-step distillation-precipitation polymerization method, and PMAA is selected as the inner shell polymer. Because PMAA has a carboxylic acid group, it has high hydration energy and water absorption capacity. The choice of PVI as the shell polymer can not only enhance the dispersion of nanotubes in the matrix, but also optimize the proton transfer carrier and improve its proton conductivity. The invention not only overcomes the problems that the SPEEK membrane is easy to lose water under high temperature and low humidity, or is easy to swell in water, resulting in poor mechanical properties, but also ensures that the composite PEM has the advantages of high proton conductivity, high water retention, and good dimensional stability. .

Description

technical field [0001] The invention belongs to the field of preparation of nanocomposite membranes with high water retention and high proton conductivity, and in particular relates to an acid-base double-shell nanotube composite proton exchange membrane satisfying high proton conductivity, high water retention and excellent dimensional stability at the same time. Background technique [0002] Proton exchange membrane fuel cell is an environment-friendly energy device with high conversion efficiency and no pollution emission. As one of the core components of the fuel cell, the proton exchange membrane plays the dual role of separating fuel and oxidant and conducting protons. Its excellent comprehensive performance guarantees the long-term and efficient operation of the fuel cell. So far, the PEMs reported in the literature are mainly divided into four categories: (1) fluorine-containing exchange membranes, the representative products of which mainly include the Nafion series...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/1025H01M8/1041H01M8/1086
CPCH01M8/1025H01M8/1041H01M8/1086Y02E60/50
Inventor 丁会利张歌孙翔李赛萌高子腾杨庆宾刘晓阳任红倩
Owner HEBEI UNIV OF TECH
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