Magnesium hydroxide super-hydrophobic film and preparation method and application thereof

A magnesium hydroxide and superhydrophobic technology, applied in the field of materials, achieves the effect of low cost, low equipment requirements, and safe operating environment for personnel

Inactive Publication Date: 2019-01-04
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The common magnesium resource in the salt lake area is a good raw material in the process of preparing magnesium hydroxide superhydrophobic materials by electrochemical methods. However, there is no low-cost, simple-step electrodeposition method for preparing magnesium hydroxide superhydrophobic films. See various reports

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  • Magnesium hydroxide super-hydrophobic film and preparation method and application thereof
  • Magnesium hydroxide super-hydrophobic film and preparation method and application thereof
  • Magnesium hydroxide super-hydrophobic film and preparation method and application thereof

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[0029] One aspect of the embodiments of the present invention provides a method for preparing a magnesium hydroxide superhydrophobic film layer, which includes:

[0030] providing a precursor solution comprising magnesium ions;

[0031] The metal substrate is used as the cathode, the cathode and the anode form an electrode system, and the metal substrate and the anode are immersed in the precursor solution, and the electrode system is used for electrochemical deposition, forming a microscopic electrode system on the surface of the cathode. Nanostructured magnesium hydroxide film layer;

[0032] And, the magnesium hydroxide film layer is subjected to surface modification treatment, and then dried to obtain a superhydrophobic film layer of magnesium hydroxide.

[0033] In some embodiments, the concentration of magnesium ions in the precursor solution is 0.01-0.5 mol L -1 .

[0034] Further, the precursor solution includes a magnesium salt solution such as an aqueous solution ...

Embodiment 1

[0071] After the metal copper was polished with sandpaper, it was ultrasonically washed with ethanol, acetone, dilute hydrochloric acid and deionized water for 10 minutes in sequence, fixed with a conductive clip as the cathode, and a lead plate as the anode. At 0.01mol·L -1 electrolysis in aqueous magnesium chloride solution with a current density of 2A m -2 , the electrolysis time is 3 hours, and a magnesium hydroxide film layer with a micro-nano structure is formed on the surface of the metal copper cathode. The picture can be referred to Figure 1b , its SEM picture is as Figure 2a and Figure 2b As shown, it can be clearly seen that the micro-nano structure is formed by the aggregation of small plate-like structures, and its XRD pattern is as follows Figure 4 shown. Soak the metal copper cathode covered with magnesium hydroxide film layer to 0.01mol L -1 In the ethanol solution of stearic acid, the reaction conditions are normal temperature and pressure, and the so...

Embodiment 2

[0073] After the metal iron was polished with sandpaper, it was ultrasonically washed with ethanol, acetone, dilute hydrochloric acid and deionized water for 10 minutes in sequence, fixed with a conductive clip as the cathode, and a titanium alloy as the anode. at 0.5mol·L -1 electrolysis in aqueous magnesium nitrate solution with a current density of 100A m -2 , the electrolysis time is 2 minutes, and a magnesium hydroxide film layer with a micro-nano structure is formed on the surface of the metal iron cathode. Soak the metal iron cathode covered with a magnesium hydroxide film layer to 0.5mol L -1 In the acetone solution of stearic acid, the reaction conditions are normal temperature and pressure, and the soaking time is 30 minutes, so as to obtain the magnesium hydroxide film layer after the surface modification of stearic acid. The surface-modified magnesium hydroxide film layer was dried at 60°C for 10 minutes, and the contact angle between the obtained surface and wat...

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Abstract

The invention discloses magnesium hydroxide super-hydrophobic film and a preparation method and application thereof. The preparation method of the magnesium hydroxide super-hydrophobic film includes:providing a precursor solution containing magnesium ions; using a metal substrate as a cathode, enabling the cathode and an anode to form an electrode system, soaking the metal substrate and the anodein the precursor solution, and performing electrochemical deposition with the electrode system to form magnesium hydroxide film of micro-nano structure on the surface of the cathode; subjecting the magnesium hydroxide film to surface modification, and drying to obtain the magnesium hydroxide super-hydrophobic film. The electric deposition to prepare hydroxide magnesium layer of micro-nano structure is combined with a magnesium hydroxide surface modification technique herein; the preparation method has simple steps; the materials used are low in cost; the prepared novel magnesium hydroxide super-hydrophobic film has good water repelling performance and self-cleaning performance, and has a good application prospect in the fields, such as metal surface corrosion resistance and self-cleaning.

Description

technical field [0001] The invention relates to a magnesium hydroxide superhydrophobic film layer, in particular to a novel magnesium hydroxide superhydrophobic film layer and a preparation method and application thereof, belonging to the field of material technology. Background technique [0002] Superhydrophobic materials are inspired by nature, such as lotus leaves, canna leaves and water strider feet in nature, all of which have superhydrophobic properties. Researchers usually use chemical deposition method, template method and etching method, etc., and use one-step or two-step method to shape low surface energy film layer with micro-nano structure on solid substrate. The abundant voids in the superhydrophobic film layer can accommodate a large amount of air, thereby forming a gas-liquid interface on the surface of the material and preventing aqueous solution from entering the interior of the material. Potential applications of superhydrophobic materials include anti-co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D9/08C25D9/10C25D9/12
CPCC25D9/08C25D9/10C25D9/12
Inventor 张波董亚萍李武冯海涛李波彭姣玉刘鑫
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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