Preparation method and application of Janus membrane material for realizing on-demand separation of oil and water

A membrane material, oil-water technology, applied in separation methods, liquid separation, semi-permeable membrane separation, etc., to achieve high permeability and selective separation ability, good interface compatibility, and a wide range of sources

Active Publication Date: 2022-07-01
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, people have developed a variety of methods to prepare Janus membranes. However, with the progress of society, people have more demands for low cost, environmental protection and high efficiency. To obtain Janus materials with diametrically opposite wettability is still challenging

Method used

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  • Preparation method and application of Janus membrane material for realizing on-demand separation of oil and water
  • Preparation method and application of Janus membrane material for realizing on-demand separation of oil and water
  • Preparation method and application of Janus membrane material for realizing on-demand separation of oil and water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Preparation of superhydrophilic ZnO@Zn@Cu meshes

[0032] The copper mesh was washed sequentially with acetone, ethanol and deionized water. Mix 5ml of concentrated sulfuric acid and 11g of ZnSO 4 Dissolve in 50ml of water, use the cleaned copper mesh as the cathode, the platinum sheet as the anode, set the power supply to constant current output mode, the current is 0.72A, immerse in the mixed solution for electrodeposition for 10min; then configure 0.006M Zn(NO 3 ) 2 , 2ml NH 3 ·H 2 O mixed solution, put the galvanized copper mesh together with the above solution into a reaction kettle, and hydrothermally react at 110 °C for 6 h to obtain a hydrophilic ZnO@Zn@Cu mesh;

[0033] (2) Preparation of Janus membrane

[0034] Mix aluminum hydroxide and phosphoric acid with a volume fraction of 60% in a ratio of 1:3, heat and stir at 100 °C for 3 hours, and cool to obtain an aluminum phosphate adhesive; mix 0.5 g of SiO 2Disperse into 15ml of ethanol and sonicate fo...

Embodiment 2

[0037] (1) Preparation of superhydrophilic ZnO@Zn@Cu meshes

[0038] The copper mesh was washed sequentially with acetone, ethanol and deionized water. Mix 5ml of concentrated sulfuric acid and 11g of ZnSO 4 Dissolve in 50ml of water, use the cleaned copper mesh as the cathode, the platinum sheet as the anode, set the power supply to constant current output mode, the current is 0.60A, immerse in the mixed solution for electrodeposition for 15min; then configure 0.006M Zn(NO 3 ) 2 , 2ml NH 3 ·H 2 O mixed solution, put the galvanized copper mesh together with the above solution into a reaction kettle, and hydrothermally react at 110 °C for 6 h to obtain a hydrophilic ZnO@Zn@Cu mesh;

[0039] (2) Preparation of Janus membrane

[0040] Mix aluminum hydroxide and phosphoric acid with a volume fraction of 60% in a ratio of 1:3, heat and stir at 100 °C for 3 hours, and cool to obtain an aluminum phosphate adhesive; mix 0.5 g of SiO 2 Disperse into 15ml of ethanol and sonicate f...

Embodiment 3

[0043] (1) Preparation of superhydrophilic ZnO@Zn@Cu meshes

[0044] The copper mesh was washed sequentially with acetone, ethanol and deionized water. Mix 5ml of concentrated sulfuric acid and 11g of ZnSO 4 Dissolve in 50ml of water, use the cleaned copper mesh as the cathode, the platinum sheet as the anode, set the power supply to constant current output mode, the current is 0.72A, immerse in the mixed solution for electrodeposition for 10min; then configure 0.006M Zn(NO 3 ) 2 , 2ml NH 3 ·H 2 O mixed solution, put the galvanized copper mesh together with the above solution into a reaction kettle, and hydrothermally react at 110 °C for 6 h to obtain a hydrophilic ZnO@Zn@Cu mesh;

[0045] (2) Preparation of Janus membrane

[0046] Mix aluminum hydroxide and phosphoric acid with a volume fraction of 60% in a ratio of 1:3, heat and stir at 100 °C for 3 hours, and cool to obtain an aluminum phosphate adhesive; mix 0.5 g of SiO 2 Disperse into 15ml of ethanol and sonicate f...

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Abstract

The invention belongs to the technical field of oil-water separation and environmental protection, and discloses and provides a Janus membrane material for realizing on-demand separation of oil and water and a preparation method of the Janus membrane material. Flaky zinc is electrically deposited on a copper net by using a low-cost method, super-hydrophilic zinc oxide (ZnO (at) Zn (at) Cu) is grown on the copper net by adopting a simple hydrothermal method, and then the Janus membrane with one super-hydrophobic side and the other super-hydrophilic side is obtained through selective modification of spraying SiO2 and octadecanethiol. The asymmetric wettability Janus membrane can realize on-demand separation of an oil-water mixture, and the separation efficiency of the oil-water mixture of light oil and heavy oil is kept above 99.7%. And the Janus film still keeps super-hydrophobicity after being subjected to 50 times of abrasive paper polishing, acid-base corrosion and cycle test, and shows excellent durability. The mechanical stability of the Janus membrane is improved, the oil-water separation performance is improved, and the raw materials are low in price and wide in source.

Description

technical field [0001] The invention relates to a preparation method of a Janus membrane material for realizing oil-water on-demand separation, in particular to realize high oil-water mixture separation efficiency and on-demand separation, and belongs to the technical fields of chemical wastewater separation and environmental protection. Background technique [0002] In nature, strange wetting phenomena can occur in some animals and plants with special structures (such as lotus leaves, fish scales, and beetles). Inspired by this, experts have designed various micro- and nano-structured wetting materials for Self-cleaning, droplet manipulation, water mist collection and oil-water separation. Among them, membrane separation technology is considered as one of the most effective candidate technologies because of its simple operation, high throughput and high efficiency. However, the oil blocking and high energy consumption of traditional separation membranes are the bottlenecks...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D69/02B01D71/02B01D17/022
CPCB01D67/0069B01D67/0083B01D67/0088B01D69/02B01D71/022B01D71/024B01D17/0202B01D2325/022B01D2325/30B01D2325/24B01D2325/38B01D2325/36
Inventor 郭志光徐颖杨付超邱磊曾西丁思理黄麟棋
Owner HUBEI UNIV
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