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Fog collection composite material and preparation method thereof

A composite material and mist technology, applied in hydrophobic materials and hydrophilic fields, can solve the problems of ineffective adjustment of spacing, high synthesis cost, and difficulty in obtaining large-area mist collecting materials, so as to increase etching time and increase etching effect. , Improve the effect of etching power

Inactive Publication Date: 2015-03-25
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

[0003] In the prior art, there are some reports about mist-collecting materials and their synthesis methods, but these mist-collecting materials and their synthesis methods have at least the following disadvantages: first, the existing mist-collecting materials are only hydrophilic-hydrophobic units Interspaced structure, there is no superhydrophilic single-superhydrophobic unit spaced structure, so the mist collection efficiency is low; second, the distance between the hydrophilic units on the hydrophobic substrate cannot be effectively regulated, so the mist collection efficiency cannot be affected optimization; thirdly, the synthesis method of the existing mist collection materials is complex and the synthesis cost is high, it is difficult to obtain a large area, low-cost mist collection materials with hydrophilic-hydrophobic units separated from each other

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  • Fog collection composite material and preparation method thereof
  • Fog collection composite material and preparation method thereof
  • Fog collection composite material and preparation method thereof

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preparation example Construction

[0045] (2) A preparation method of mist collection composite material

[0046] Such as Figure 1 to Figure 11 Shown, a kind of mist collection composite material and preparation method thereof, comprises the following steps:

[0047] In step one, a silicon dioxide single-layer colloidal sphere crystal array composed of closely contacting silicon dioxide microspheres is synthesized on a polydimethylsiloxane substrate by a self-organization method.

[0048] Specifically, this step may specifically include the following specific implementations:

[0049] (1) The thickness of the polydimethylsiloxane base is preferably 10 microns to 5 mm. If the thickness of the polydimethylsiloxane base is too large, it is not economical; if the polydimethylsiloxane If the thickness of the alkyl base is too small, the dimethylsiloxane base may be etched through the pit during the etching process of step 2; in practical applications, the polydimethylsiloxane base is the best The in-situ polymer...

Embodiment 1

[0058] Such as Figure 1 to Figure 11 Shown, a kind of mist collection composite material and preparation method thereof, comprises the following steps:

[0059] Step 1, using a self-organization method to synthesize a large-area hexagonally arranged and closely contacted silicon dioxide microsphere 2 array on a polydimethylsiloxane substrate 1 . Wherein, the thickness of the polydimethylsiloxane substrate 1 is 250 microns, and the diameter of the silica microspheres 2 obtained in Step 1 is 5.0 microns.

[0060] Step 2, using carbon tetrafluoride as the reaction gas, and using the reactive ion etching method to etch the polydimethylsiloxane substrate 1 attached with the silicon dioxide microspheres 2; after the etching process is completed, That is, a mist-collecting composite material in which superhydrophobic-superhydrophilic units are spaced apart from each other is obtained.

[0061] Wherein, the flow rate of carbon tetrafluoride is 30 ml / min, the etching power is 50 wat...

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Abstract

The invention discloses a fog collection composite material and a preparation method of the fog collection composite material. The fog collection composite material comprises a polydimethylsiloxane substrate and multiple silicon dioxide pellets on the substrate; multiple pits are distributed in the polydimethylsiloxane substrate, so that multiple flanges are formed between the adjacent pits; the silicon dioxide pellets are arranged at the intersections of the flanges, and each intersection of the flange is provided with at most one silicon dioxide pellet. The fog collection composite material achieves mutual spacing of super-hydrophobic and super-hydrophilic units, and the fog collection efficiency is improved; the preparation method of the fog collection composite material can effectively adjust the interval between the super-hydrophilic units on the super-hydrophobic substrate, so that the fog collection efficiency is optimized. Meanwhile, the preparation method is simple, easy to implement and low in cost.

Description

technical field [0001] The invention relates to the field of hydrophilic and hydrophobic materials, in particular to a mist-collecting composite material and a preparation method thereof. Background technique [0002] At present, people in many parts of the world still suffer from water scarcity. If this problem is solved by building huge and complex water conservancy projects, it will not only require a huge investment, but also take a long time. There is a lot of water in the fog, but most of this water cannot be used effectively. However, inspired by the back structure of the Namibian desert beetle, the researchers began to develop bionic mist collection materials in order to effectively collect and utilize the moisture in the mist. [0003] In the prior art, there are some reports about mist-collecting materials and their synthesis methods, but these mist-collecting materials and their synthesis methods have at least the following disadvantages: first, the existing mis...

Claims

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Application Information

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IPC IPC(8): B81B1/00B81C1/00C09K3/18
Inventor 李越吴艳春李昕扬刘迪龙蔡伟平
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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