Super-hydrophobic metal net based on bionic mussels as well as preparation method and application of super-hydrophobic metal net

A metal mesh, super-hydrophobic technology, applied in separation methods, chemical instruments and methods, liquid separation, etc., can solve the problems of high preparation cost, single performance, poor environmental protection, etc. Good performance

Pending Publication Date: 2020-11-03
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] (1) The rough surface structure of superhydrophobic materials has poor stability, fluorine-containing compounds are expensive and have poor environmental protection, which limits the development and application of superhydrophobic materials to a certain extent.
[0004] (2) Long production cycle, complicated process, high preparation cost, single performance, and poor antifouling performance
[0005] (3) Some superhydrophobic materials have poor chemical stability and single performance, making it difficult to apply to complex and harsh working environments
The metal meshes prepared above all have super-hydrophobic or super-hydrophilic properties, but the use of fluorine-containing toxic solvents and coating materials may cause secondary pollution, and the preparation

Method used

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  • Super-hydrophobic metal net based on bionic mussels as well as preparation method and application of super-hydrophobic metal net
  • Super-hydrophobic metal net based on bionic mussels as well as preparation method and application of super-hydrophobic metal net
  • Super-hydrophobic metal net based on bionic mussels as well as preparation method and application of super-hydrophobic metal net

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A kind of superhydrophobic metal net and preparation method thereof are as follows:

[0043] (1) Pretreatment of metal mesh. Cut the 300-mesh stainless steel wire mesh into 40×40mm squares, soak it in dilute hydrochloric acid solution and absolute ethanol successively, and ultrasonically clean it for 20 minutes to remove surface oxides and grease. Dry in the oven for later use.

[0044](2) Preparation of Tris-HCl (0.01 mol / L) buffer solution: 1.576 g of Tris-HCl was dissolved in 1 L of solution to prepare a 10 mM buffer solution.

[0045] (3) Place the metal mesh obtained in step (1) in a 1.5 mg / mL dopamine hydrochloride solution, adjust the pH of the solution to 8.5 with Tris-HCl buffer, stir and react in a water bath for 24 hours at a temperature of 60°C, After washing several times with pure water, dry at 60° for later use.

[0046] (4) the metal mesh that step (3) is obtained is placed in the silver nitrate solution of 12mM, reacts 12h on the magnetic stirrer, an...

Embodiment 2

[0059] A kind of superhydrophobic metal net and preparation method thereof are as follows:

[0060] (1) Pretreatment of metal mesh. Cut the 400-mesh stainless steel wire mesh into a 40×40mm square, soak it in acetone and absolute ethanol successively, and ultrasonically clean it for 20 minutes to remove surface oxides and grease. After taking it out, wash it with pure water several times, and place it in a vacuum drying oven. Dry in medium.

[0061] (2) Preparation of Tris-HCl (0.01 mol / L) buffer solution: 1.576 g of Tris-HCl was dissolved in 1 L of solution to prepare a 10 mM buffer solution.

[0062] (3) The metal mesh obtained in step (1) was placed in a 1.5 mg / mL dopamine hydrochloride solution, and the pH of the solution was adjusted to 8.5, and Tris-HCl buffer was used for adjustment. Stir and react at 30°C for 24h, wash with pure water repeatedly, and dry (60°) for later use.

[0063] (4) Place the metal mesh obtained in step (3) in a 12mM silver nitrate solution, re...

Embodiment 3

[0067] A kind of superhydrophobic metal net and preparation method thereof are as follows:

[0068] (1) Pretreatment of metal mesh. Cut the 200-mesh stainless steel wire mesh into a 40×40mm square, soak it in acetone and absolute ethanol successively, and ultrasonically clean it for 20 minutes to remove surface oxides and grease. After taking it out, wash it with pure water several times, and place it in a vacuum drying oven. Dry in medium.

[0069] (2) Preparation of Tris-HCl (0.01 mol / L) buffer solution: 1.576 g of Tris-HCl was dissolved in 1 L of solution to prepare a 10 mM buffer solution.

[0070] (3) Place the metal mesh obtained in step (1) in a 1.5 mg / mL dopamine hydrochloride solution, adjust the pH to 8.5 with Tris-HCl buffer, stir and react in a water bath for 24 hours at a temperature of 60°C, and use After washing with pure water several times, dry at 60° for later use.

[0071] (4) The metal mesh obtained in step (3) was placed in a 15 mM silver nitrate soluti...

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Abstract

The invention discloses a super-hydrophobic metal net based on bionic mussels as well as a preparation method and application of the super-hydrophobic metal net, and belongs to the technical field ofoil-water separation materials. The preparation method comprises the following steps: pretreating a metal net to remove oxides and grease on the surface; immersing the metal net in a dopamine solution, a metal salt solution and a long-chain amino compound solution with certain concentrations in sequence for reaction, and finally drying. The preparation method provided by the invention is simple, environment-friendly, low in energy consumption, low in cost and beneficial to large-scale production; the metal wire mesh is covered with a layer of rough metal nanoclusters, has high acid resistance,alkali resistance, salt resistance, organic solvent resistance and antibacterial performance, can achieve efficient separation of heavy oil and light oil mixtures in the oily wastewater under the action of gravity, is applied to treatment of the oily wastewater, and has the separation efficiency as high as 99.8%.

Description

technical field [0001] The invention belongs to the technical field of oil-water separation materials, and in particular relates to a superhydrophobic metal mesh based on bionic mussels and a preparation method and application thereof. Background technique [0002] Oil-water separation is an interfacial phenomenon. Special wettability materials show opposite wetting behaviors for the oil phase and water phase in the mixture, which can achieve efficient separation of various oil-water mixtures. The earliest discovered superwetting material is superhydrophobic, and its surface has a contact angle of more than 150° to water in air. The surface of this material has extremely low surface energy and is an excellent oil-water separation material. At present, superwetting materials are mainly prepared by two methods, one is to construct a rough structure on the surface of the material, and the other is to use low surface energy reagents (long-chain alkyl or fluorine-containing reage...

Claims

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Application Information

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IPC IPC(8): B01D17/022
CPCB01D17/0202
Inventor 刘宇程祝梦陈明燕王茂仁白杨
Owner SOUTHWEST PETROLEUM UNIV
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