Annular wettability gradient copper net and production method thereof

A wetting and copper mesh technology, which is applied in the field of annular wetting gradient copper mesh and its preparation, can solve the problems of low water collection efficiency and high cost, and achieve the effects of high water collection efficiency, low cost and simple operation

Active Publication Date: 2018-12-18
BEIHANG UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0005] In order to overcome the shortcomings of low water collection efficiency and high cost of existing water collection materials, the present invention is inspired by the ability of natural beetles to collect water from the air, proposes a ring-shaped wettable gradient copper mesh and its preparation method, and prepares an imitation High water-harvesting efficiency, low cost and simple preparation of beetle-structured circular wettable gradient copper mesh

Method used

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  • Annular wettability gradient copper net and production method thereof
  • Annular wettability gradient copper net and production method thereof
  • Annular wettability gradient copper net and production method thereof

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preparation example Construction

[0024] In the preparation method of the annular wettable gradient copper mesh provided by the present invention, the copper mesh is immersed in the electrolyte by an anodic oxidation method, and rapidly oxidized under certain conditions to form an annular gradient electric field to obtain the annular wettable gradient copper mesh. The experimental device for anodizing such as figure 1 As shown in a, the schematic diagram of the experimental process is shown in figure 1 As shown in b, during the experiment, current 1>current 2>current 3, so the oxidation effect on different positions of the copper mesh is different. The divalent copper in the center has good hydrophilicity, and the farther away from the center, the worse the hydrophilicity. A copper mesh with a circular wettability gradient is formed.

[0025] The prepared annular wettable gradient copper mesh has a beetle-like hydrophilic and hydrophobic lattice structure, which can quickly capture the moisture in the mist, q...

Embodiment 1

[0027] The preparation method of annular wettable gradient copper mesh, the specific steps are as follows:

[0028] (1) Put the 180-mesh copper net of 16cm×16cm into 0.1% nitric acid, acetone, and ethanol solution for 15 minutes respectively, wash and dry;

[0029] (2) Put the dried copper mesh into 1M ethanol solution of dodecanethiol, soak for 3 hours, take it out, rinse it with absolute ethanol three times, and dry it at 60°C to obtain a hydrophobic copper mesh.

[0030] (3) Put the hydrophobic copper net into 0.05M NaOH solution, take the copper net as the anode and the copper wire as the cathode, at a voltage of 3V, the diameter of the copper wire is 1mm, and the distance between the cathode and the anode is 0.5mm Under the same conditions, the anodic oxidation was carried out for 120s to obtain a circular wettable gradient copper mesh imitating the beetle structure.

[0031] The resulting circular wettable gradient copper mesh, as figure 2 As shown, its surface has a ...

Embodiment 2

[0034] The preparation method of annular wettable gradient copper mesh, the specific steps are as follows:

[0035] (1) Put the 180-mesh red copper net of 16cm×16cm into 0.1% nitric acid, acetone, and ethanol solution for 15 minutes respectively, wash and dry;

[0036] (2) Put the dried copper mesh into 1M ethanol solution of dodecanethiol, soak for 3 hours, take it out, rinse it with absolute ethanol three times, and dry it at 60°C to obtain a hydrophobic copper mesh.

[0037] (3) Put the hydrophobic copper mesh into the 0.05M NaOH solution, take the copper mesh as the anode and the copper wire as the cathode, the distance between adjacent copper wires is 3cm, the voltage is 8V, and the diameter of the cathode is 1mm , under the condition that the distance between the anode and the cathode is 0.5mm, the anodization is carried out for 120s to obtain a ring-shaped wettable gradient copper mesh imitating the beetle structure.

[0038]The surface of the prepared annular wettabil...

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Abstract

The invention discloses an annular wettability gradient copper net produced by an anodic oxidation method and a production method of the annular wettability gradient copper net and belongs to the technical field of production of water-collecting copper nets. The production method comprises the following steps that firstly, a 16 cm*16 cm 180-mesh red copper net is placed into a nitric acid solution, an acetone solution and an ethanol solution in sequence, ultrasonic treatment is carried out for 15 minutes, and the red copper net is washed and then dried; then the dried red copper net is soakedin an organic ethanol solution for 3 hours and taken out and is washed with anhydrous ethanol and dried, and the copper net with the hydrophobic property is obtained; and finally, the copper net withthe hydrophobic property is put into an alkaline solution, the copper net is taken as the positive pole, copper wires are taken as the negative pole, anodic oxidation is carried out, and the annular wettability gradient copper net is obtained. The copper net is provided with a beetle-like hydrophilic and hydrophobic lattice structure and an annular wettability gradient structure, the capability ofcapturing liquid drops is improved, continuous and efficient mist collection is realized, the water collection efficiency is high, and the water collection amount is large. The production method hassimple operation and low cost and has the good application prospect in water shortage areas.

Description

technical field [0001] The invention belongs to the technical field of preparation of water-collecting copper nets, and in particular relates to an annular wettable gradient copper net and a preparation method thereof. Background technique [0002] Although a large part of the earth is covered by oceans, the scarcity of fresh water resources has always been a problem that plagues people. This lack not only affects the development of the national economy, but also poses a great threat to human survival. Coastal areas use high-cost means to desalinate seawater, while desert areas collect water from fog and rain. The traditional method of collecting fresh water not only consumes a lot of resources, but also has low efficiency. Studies have shown that many water-deficient areas have a lot of humidity, and the air is filled with a large number of water molecules, which will produce a lot of fog. If the moisture in the fog can be collected in a simple way, it will undoubtedly imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/34C25D7/00
CPCC25D7/00C25D11/34
Inventor 侯永平邢厌
Owner BEIHANG UNIV
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