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Super-hydrophobic material with hierarchical coarse structure and preparation method and application thereof

A rough structure, super-hydrophobic technology, applied in separation methods, chemical instruments and methods, textiles and papermaking, etc., can solve the problems of poor bonding and stability between nanoparticles and substrates, easy aggregation of nanoparticles, poor repeatability, etc., to achieve saving The effect of reaction time, fast reaction rate and uniform heating

Active Publication Date: 2021-04-13
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Most of the above methods firstly prepare the nanoparticles, and then build the roughness by mixing and coating. During this process, the nanoparticles are easy to aggregate, resulting in poor repeatability and waste of materials. Although the electrostatic self-assembly method can be Avoid the agglomeration and aggregation of nanoparticles, but the electrostatic interaction, the binding degree and stability of nanoparticles and substrate are poor

Method used

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  • Super-hydrophobic material with hierarchical coarse structure and preparation method and application thereof
  • Super-hydrophobic material with hierarchical coarse structure and preparation method and application thereof
  • Super-hydrophobic material with hierarchical coarse structure and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044](1) 1.0 ml of titanium sulfate was added dropwise to 150 mL of continuously stirred deionized water, while slowly dropped the sulfuric acid to adjust the pH to 3;

[0045](2) Add a cotton fabric (2 cm x 2 cm) to the above mixture, at normal pressure, microwave irradiation in the microwave reactor, the reaction temperature is 70 ° C, the reaction power is 150W, the reaction time is 45 min, the reaction is completed, Cool to room temperature, remove, remove water wash (100 ml * 3), 30 degrees vacuum dry for 48 hours, obtained TiO2- cotton fabric.

[0046](3) Mix the mercapto-siloxane, deionized water, ethanol according to the ratio of 4: 6: 9, stirred at normal temperature for 1 h, resulting in a mercaptosiloxane solution. Subsequently, the above TIO2- Cotton fabric is immersed in a mercaptosiloxane solution, and the impregnated time is 2 h to give a thiol-TiO2-cotton fabric.

[0047](4) The solution of 5 wt% methacrylate is formulated, 2 wt% restored ether (compared to the quality of th...

Embodiment 2

[0049](1) Treatment of commercially available 2g acrylonitrile fibers with 5 wt% potassium sulfate solution;

[0050](2) 1.0 ml of titanium sulfate was added dropwise to 100 mL of continuously stirred deionized water, while slowly dropping the sulfuric acid to adjust pH to 4;

[0051](3) Immerse the processed acrylonitrile fibers in the mixture, at normal pressure, microwave irradiation, the reaction temperature is 80 ° C, the reaction power is 80W, the reaction time is 10 min, the reaction is completed, cooling To room temperature, deionized water was washed (100 mL * 3), and the dried over 50 degrees was dried for 24 hours.

[0052](4) The above-mentioned polyacrylonitrile fibers having a rough structure of TiO2 are placed in a sealed container, and hexafluorobutyltrimethoxysilane is added, and the low surface energy substance is deposited to have a rough structure at 200 degrees. The surface of the polyacrylonitrile fiber, which obtains superhydrophobic polyacrylonitrile fibers. The conta...

Embodiment 3

[0054](1) The commercially available nylon microporous membrane is immersed in a dopamine solution (0.2 g of dicamine, 0.24 g of Tris-HCl and 200 mL water), and the polybicine layer is modified on the surface of the porous filter surface.

[0055](2) 10 ml of titanium tetrachloride was added dropwise to 100 mL of the continuously stirred ethanol and deionized water, wherein the volume ratio of ethanol and deionized water was 1: 5, while slowly dropping citric acid to adjust pH to 4.

[0056](3) Immersion the nylon membrane after (1) is immersed in the mixture, and the microwave irradiation is performed under normal pressure, the reaction temperature is 50 ° C, the reaction power is 240W, the reaction time is 30 min, the reaction is completed Cooled to room temperature, deionized water washed (100 mL * 3), and dried over 80 degrees for 24 hours.

[0057](4) The above-mentioned nylon membrane having a rough structure of TiO2 is placed in a sealed container, and thirteenctyl triethoxysilane is ...

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Abstract

The invention relates to a super-hydrophobic material with a hierarchical coarse structure. The super-hydrophobic material is characterized in that metal oxide microspheres with a secondary coarse structure are arranged on the surface of a substrate material, and the outer surfaces of the microspheres are modified with a low-surface-energy substance layer. The invention further relates to a preparation method and application of the material. The super-hydrophobic material with the hierarchical coarse structure is simple in preparation process and good in material stability, and has excellent effects in the fields of self-cleaning, water prevention, pollution prevention, drag reduction, noise reduction, oil-water separation and the like.

Description

Technical field[0001]The present invention belongs to the field of nano-composite materials, and more particularly to a superhydrophobic material having a coarse structure and a preparation method thereof.Background technique[0002]Ultra-hydrophobic materials exhibited broad application prospects in the fields of clean, waterproof and anti-fouling, anti-polluting, low-cost noise, water treatment. However, a conventional fluorine and silicon material are simple coating on the surface of the solid material, and it is difficult to achieve superhydrophobic properties of the material.[0003]Studies have shown that hydrophobicity of material surface is determined by surface energy and surface roughness. Therefore, increase the hydrophobicity of the membrane surface, it is necessary to increase roughness and reduce surface energy.[0004]Most of the current surface coating modification, most coating materials are mostly fluorine-containing low surface energy, which is not only toxic and expens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/46D06M13/50D06M11/79D06M13/224D06M13/513D06M15/37D06M13/517B01D17/022D06M101/06D06M101/28D06M101/34
CPCD06M11/46D06M13/50D06M11/79D06M13/2246D06M13/513D06M15/37D06M13/517B01D17/0202D06M2101/06D06M2101/28D06M2101/34D06M2200/12D06M2200/01
Inventor 李望良李艳香杨玉洁
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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