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Nafion/orthophosphoric loaded covalent organic framework material composite film, preparation and application

A covalent organic framework and composite membrane technology, which is applied to fuel cell parts, electrical components, circuits, etc., can solve the problems of fuel cells that have not been reported in the literature, and achieve simple and controllable preparation process, good compatibility, The effect of cheap and easy-to-obtain materials

Active Publication Date: 2017-02-22
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, Nafion / phosphoric acid-loaded covalent organic framework composite membranes have not been reported in the literature for fuel cells

Method used

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  • Nafion/orthophosphoric loaded covalent organic framework material composite film, preparation and application
  • Nafion/orthophosphoric loaded covalent organic framework material composite film, preparation and application
  • Nafion/orthophosphoric loaded covalent organic framework material composite film, preparation and application

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Embodiment 1: prepare Nafion / H 3 PO 4 @S1-5 Composite film.

[0024] Step 1. Preparation of covalent organic framework material: Dissolve 0.5g melamine and 0.5g terephthalaldehyde in 10mL dimethyl sulfoxide to form a mixture; stir the mixture at 180°C for 72h; cool the mixture to room temperature, pump Filter, wash, and dry to obtain a covalent organic framework material;

[0025] Step 2, phosphoric acid-loaded covalent organic framework material: put 0.5 g of the covalent organic framework material prepared in step 1 into a Soxhlet extractor, and use dichloromethane as a solvent to reflux for 24 hours; place the obtained solid in a Schlenk reaction Vacuumize the tube at 120°C for 18h; when the temperature of the Schlenk reaction tube drops to 80°C, add 10mL of phosphoric acid aqueous solution with a mass percentage of phosphoric acid of 30% to the covalent organic framework material under vacuum and stir for 1h, then return to normal pressure Then continue to stir f...

Embodiment 2

[0028] Embodiment 2: preparation Nafion / H 3 PO 4 @S1-10 Composite film.

[0029] Step 1. Preparation of covalent organic framework material: Dissolve 0.5g of melamine and 1g of terephthalaldehyde in 50mL of dimethyl sulfoxide to form a mixture; stir the mixture at 180°C for 60h; cool the mixture to room temperature, and filter with suction , washed and dried to obtain a covalent organic framework material;

[0030] Step 2, phosphoric acid-loaded covalent organic framework material: put 0.5 g of the covalent organic framework material prepared in step 1 into a Soxhlet extractor, and use dichloromethane as a solvent to reflux for 24 hours; place the obtained solid in a Schlenk reaction Vacuumize the tube at 120°C for 12h; when the temperature of the Schlenk reaction tube drops to 80°C, add 25mL of phosphoric acid aqueous solution with a mass percentage of phosphoric acid of 50% to the covalent organic framework material under vacuum and stir for 3h, and return to normal pressu...

Embodiment 3

[0033] Embodiment 3: prepare Nafion / H 3 PO 4 @S1-15 Composite film.

[0034] Step 1. Preparation of covalent organic framework material: Dissolve 0.5g melamine and 1.5g terephthalaldehyde in 25mL dimethyl sulfoxide to form a mixture; stir the mixture at 180°C for 48h; cool the mixture to room temperature, pump Filter, wash, and dry to obtain a covalent organic framework material;

[0035] Step 2, phosphoric acid-loaded covalent organic framework material: put 0.5 g of the covalent organic framework material prepared in step 1 into a Soxhlet extractor, and use dichloromethane as a solvent to reflux for 24 hours; place the obtained solid in a Schlenk reaction Vacuumize the tube at 120°C for 24 hours; when the temperature of the Schlenk reaction tube drops to 80°C, add 50 mL of phosphoric acid aqueous solution with a mass percentage of phosphoric acid of 40% to the covalent organic framework material under vacuum and stir for 2 hours, and return to normal pressure Then continu...

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Abstract

The invention discloses a Nafion / orthophosphoric loaded covalent organic framework material composite film; the composite film is 70-100 micrometer in thickness and formed by covalent organic framework material loaded with Nafion / orthophosphoric acid, wherein the mass ratio of the orthophosphoric loaded covalent organic framework material to the Nafion is 0.05-0.2: 1. The preparation process includes steps of compounding covalent organic framework material; loading an orthophosphoric molecule to a hole duct of the covalent organic framework material by a vacuum assistant method, and obtaining the orthophosphoric loaded covalent organic framework material; commixing the orthophosphoric loaded covalent organic framework material with Nafion solution and obtaining a film casting fluid; preparing the composite film by a tape casting method. The materials for the composite film are low in price and easy to obtain, and the preparation process is simple and controllable; the prepared Nafion / orthophosphoric loaded covalent organic framework material composite film is applied to a proton exchange film fuel battery, and has high proton conductivity under the saturated humidity and low humidity.

Description

technical field [0001] The invention relates to a Nafion / phosphoric acid-loaded covalent organic framework material composite membrane and its preparation and application, and belongs to the technical field of polymer-organic composite membranes. Background technique [0002] Facing the global energy shortage and environmental pollution problems, finding efficient, environmentally friendly and renewable clean energy has become an important task. Proton exchange membrane fuel cell (PEMFC) utilizes the redox reaction between renewable fuels (hydrogen, alcohols, hydrocarbons, etc.) Electrochemical devices have the advantages of high fuel utilization rate, low pollution and high energy density, and are suitable for the sustainable development of human society. They are considered to be the most promising new generation of portable power sources. [0003] The proton exchange membrane is the core component of PEMFC, it also acts as a diaphragm and an electrolyte, and its cost acc...

Claims

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Application Information

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IPC IPC(8): C08J5/22C08K9/12C08K3/32C08L41/00C08G12/32H01M8/02H01M2/16H01M50/411
CPCH01M8/02C08G12/32C08J5/2237C08K3/32C08K9/12C08L2203/16C08J2341/00H01M50/411C08L41/00Y02E60/50Y02E60/10
Inventor 吴洪尹永恒姜忠义
Owner TIANJIN UNIV
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