A kind of bipolar film of surface loading graphyne and preparation method thereof

A surface-loaded, graphdiyne technology, applied in diaphragms, electrolytic components, electrolytic processes, etc., can solve the problems of low water dissociation efficiency of bipolar membranes, short working life of bipolar membranes, and large water dissociation voltage, etc., to improve chemical stability. The effect of improving the mechanical properties and promoting the dissociation of water

Active Publication Date: 2019-11-15
TAIYUAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention mainly aims at the disadvantages of low water dissociation efficiency, large water dissociation voltage, short working life of the bipolar membrane and easy contamination by electrolyte in the prior art, and provides a bipolar membrane with graphyne loaded on its surface and its Preparation

Method used

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  • A kind of bipolar film of surface loading graphyne and preparation method thereof
  • A kind of bipolar film of surface loading graphyne and preparation method thereof
  • A kind of bipolar film of surface loading graphyne and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 6.0g PhBr 6 , 4.0g CaC 2 Stainless steel balls different in diameter and size were added to a stainless steel tank filled with 100 milliliters of absolute ethanol, and a planetary ball mill was used to operate at a speed of 450 rpm for 15 hours. The mixture was washed, filtered, and dried to obtain black powder graphdiyne. The graphdiyne powder was made into a dilute solution, fixed on the surfaces of both sides of the bipolar membrane by coating, and dried naturally to obtain a bipolar membrane with a total thickness of 80.8nm.

[0019] In order to further demonstrate the effect of the bipolar membrane of the present invention, the present invention uses an electronic universal testing machine to test its mechanical properties of Young's modulus, tensile strength, maximum load and elongation at break. At the same time, the bipolar membrane of the present invention is used as the diaphragm of the cathode and anode chambers to conduct water dissociation under the ...

Embodiment 2

[0024] Weigh 9.0g PhBr 6 , 6.0g CaC 2 Stainless steel balls with different diameters were added to a stainless steel tank filled with 150 ml of absolute ethanol, and the planetary ball mill was operated at a speed of 450 rpm for 18 hours, and the mixture was washed, filtered, and dried to obtain black powder graphyne. The graphdiyne powder was formulated into a dilute solution, fixed on the surfaces of both sides of the bipolar membrane by electrophoresis, and dried naturally to obtain a bipolar membrane with a total thickness of 92.3 nm. The electronic universal testing machine was used to test the mechanical properties such as Young's modulus and tensile strength. At the same time, the bipolar membrane of the present invention is used as the diaphragm of the cathode and anode chambers to conduct water dissociation under the action of an external DC electric field, and the water dissociation voltage, water dissociation efficiency and service life of the bipolar membrane are ...

Embodiment 3

[0029] Weigh 13.5g PhBr 6 , 9.0g CaC 2 Stainless steel balls with different diameters were added to a stainless steel tank filled with 150 ml of absolute ethanol, and the planetary ball mill was operated at a speed of 450 rpm for 18 hours, and the mixture was washed, filtered, and dried to obtain black powder graphyne. The graphdiyne powder was prepared into a dilute solution, fixed on the surfaces of both sides of the bipolar membrane by electrophoresis, and dried naturally to obtain a bipolar membrane with a total thickness of 95.6 nm. The electronic universal testing machine was used to test the mechanical properties such as Young's modulus and tensile strength. At the same time, the bipolar membrane of the present invention is used as the diaphragm of the cathode and anode chambers to conduct water dissociation under the action of an external DC electric field, and the water dissociation voltage, water dissociation efficiency and service life of the bipolar membrane are s...

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Abstract

The invention discloses a surface graphdiyne-carried bipolar membrane and a preparation method thereof. The surface graphdiyne-carried bipolar membrane structurally comprises a cation exchange membrane layer and an anion exchange membrane layer. The preparation method of the surface graphdiyne-carried bipolar membrane comprises fixing dilute graphdiyne solution onto both side surfaces of a bipolarmembrane through absorption, coating or electrophoresis and then air-drying the bipolar membrane. Through graphdiyne carried on both sides, the prepared surface graphdiyne-carried bipolar membrane can prevent Na+, Cu2+, Cl-, SO42-, C6H6 and CCL4 in electrolytes from passing through and further avoid contamination of the electrolytes to the bipolar membrane, and meanwhile allow permeation of waterto promote hydrolytic dissociation of the middle interface layer of the bipolar membrane; beside, the graphdiyne carried on both sides of the bipolar membrane can reduce the dissociation voltage of the bipolar membrane through good electrical conductivity and save energy consumption.

Description

technical field [0001] The invention relates to a bipolar membrane, in particular to a bipolar membrane with graphyne loaded on the surface and a preparation method thereof. Background technique [0002] The bipolar membrane is composed of a cation exchange membrane layer, an anion exchange membrane layer and an intermediate interface layer. Under the action of a direct current electric field, the water in the intermediate interface layer dissociates to generate hydrogen ions and hydroxide ions and enter the anion and anode chambers respectively. . The water dissociation efficiency of the middle interface layer of the bipolar membrane is one of the key factors to measure the performance superiority of the bipolar membrane. Therefore, it is particularly important to improve the water dissociation efficiency of the middle interface layer. In the bipolar membrane water dissociation device, the bipolar membrane is usually mechanically fixed between the cathode and anode chamber...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/10C25B13/02C25B13/04
CPCC25B1/04C25B13/02C25B13/04C25B9/73Y02E60/36
Inventor 刘宪宋秀丽李晓静文斌韩艳娇
Owner TAIYUAN NORMAL UNIV
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