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Superhydrophobic material with hierarchical rough structure and its preparation method and use

A rough-structured, super-hydrophobic technology, applied in separation methods, chemical instruments and methods, textiles and papermaking, etc., which can solve the problems of poor adhesion and stability of nanoparticles and substrates, material waste, and poor repeatability

Active Publication Date: 2022-01-04
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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  • Superhydrophobic material with hierarchical rough structure and its preparation method and use
  • Superhydrophobic material with hierarchical rough structure and its preparation method and use
  • Superhydrophobic material with hierarchical rough structure and its preparation method and use

Examples

Experimental program
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Effect test

Embodiment 1

[0044] (1) Add 1.0 mL of titanyl sulfate dropwise to 150 mL of deionized water with constant stirring to disperse, and at the same time slowly add sulfuric acid dropwise to adjust the pH to 3;

[0045] (2) Cotton fabric (2cm x 2cm) was added to the above mixture, placed in a microwave reactor under normal pressure for microwave irradiation, the reaction temperature was 70°C, the reaction power was 150W, the reaction time was 45min, and the reaction was completed. Cool to room temperature, take out, wash with deionized water (100ml*3), vacuum dry at 30 degrees for 48 hours, the obtained TiO 2 -Cotton fabric.

[0046] (3) Mix mercaptosiloxane, deionized water, and ethanol in a ratio of 4:6:9, and stir at room temperature for 1 hour to obtain a mercaptosiloxane solution. Then the above TiO 2 - The cotton fabric is immersed in the mercaptosiloxane solution for 2 hours to obtain the mercapto-TiO2-cotton fabric.

[0047] (4) Prepare a solution of 5wt% octadecyl methacrylate, add 2w...

Embodiment 2

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

[0050] (2) Add 1.0 mL of titanyl sulfate dropwise to 100 mL of deionized water that is constantly stirred to disperse, and at the same time slowly add sulfuric acid dropwise to adjust the pH to 4;

[0051] (3) Immerse the treated acrylonitrile fibers in the above mixture, place them in a microwave reactor under normal pressure for microwave irradiation, the reaction temperature is 80°C, the reaction power is 80W, and the reaction time is 10min. After the reaction is completed, cool to room temperature, washed with deionized water (100ml*3), and dried under vacuum at 50°C for 24 hours.

[0052] (4) above-mentioned growth has TiO2 the polyacrylonitrile fiber with rough structure is put into sealed container, adds hexafluorobutyl propyl trimethoxysilane, makes low surface energy material vapor deposition to have rough structure at 200 degree On the surface of the p...

Embodiment 3

[0054] (1) Soak the commercially available nylon microporous membrane in dopamine solution (0.2g dopamine, 0.24g Tris-HCl and 200mL water), and modify the polydopamine layer on the surface of the porous membrane.

[0055] (2) Add 10mL of titanium tetrachloride dropwise to 100mL of ethanol and deionized water with continuous stirring to disperse, wherein the volume ratio of ethanol and deionized water is 1:5, and slowly add citric acid dropwise to adjust the pH to 4.

[0056] (3) Immerse the nylon membrane treated in (1) in the above mixture, place it in a microwave reactor under normal pressure for microwave irradiation, the reaction temperature is 50°C, the reaction power is 240W, the reaction time is 30min, and the reaction is completed , cooled to room temperature, washed with deionized water (100ml*3), and vacuum-dried at 80°C for 24 hours.

[0057] (4) Put the above-mentioned grown TiO2 nylon film with a rough structure into a sealed container, add tridecafluorooctyl trie...

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Abstract

The invention relates to a superhydrophobic material with a hierarchical rough structure, which is characterized in that: the surface of the base material has metal oxide microspheres with a secondary rough structure, and the outer surface is modified with a low surface energy material layer. The invention further relates to processes for the preparation and use of said materials. The superhydrophobic material with hierarchical rough structure of the present invention has simple preparation process and good material stability, and has excellent effects in the fields of self-cleaning, waterproof and antifouling, drag reduction and noise reduction, oil-water separation and the like.

Description

technical field [0001] The invention belongs to the field of preparation of nanocomposite materials, in particular to a superhydrophobic material with hierarchical rough structure, its preparation method and application. Background technique [0002] Due to their excellent water repellency, superhydrophobic materials have shown broad application prospects in the fields of self-cleaning, waterproof and antifouling, drag reduction and noise reduction, and water treatment. However, it is difficult to achieve superhydrophobic properties of materials by simply coating the surface of solid materials with traditional fluorine and silicon materials. [0003] Studies have shown that the hydrophobicity of the material surface is determined by the surface energy and surface roughness. Therefore, to improve the hydrophobicity of the membrane surface, it is necessary to increase the roughness and reduce the surface energy. [0004] In the current surface coating and modification method...

Claims

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Application Information

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Patent Type & Authority Patents(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