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Superhydrophobic coating and preparation method thereof

A technology of superhydrophobic coatings and glycidyl ethers, applied in polyester coatings, polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor comprehensive performance of paint films, and achieve high comprehensive paint film performance, narrow molecular weight distribution, good hydrophobic effect

Inactive Publication Date: 2015-04-29
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is simple to operate and has good hydrophobicity, but the overall performance of the paint film is poor

Method used

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  • Superhydrophobic coating and preparation method thereof
  • Superhydrophobic coating and preparation method thereof
  • Superhydrophobic coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: The molecular weight of fluorine-containing block copolymer is 9000, and the structure is:

[0035]

[0036] where m=56, n=6.

[0037] A. Preparation of fluorine-containing block copolymer:

[0038] Add glycidyl methacrylate (GMA) 14.22g (0.1mol), ethyl α-bromoisobutyrate (EBiB) 0.3467g (0.001778mol), CuBr 2 0.0122g (5.0×10 -5 mol), pentamethyldiethylenetriamine (PMDETA) 0.08665g (5.0×10 -4 mol), azobisisobutyronitrile (AIBN) 0.1232g (7.5×10 -4 mol), 7.11 g of toluene, after mixing uniformly, nitrogen was passed for 1 h, and reacted in an oil bath at 70° C. for 5 h. After the conversion rate reached 80%, a light yellow viscous product was obtained. Then, 1.867 g (0.0111 mol) of trifluoroethyl methacrylate (TFEMA) was added into the reaction vessel, and the reaction was continued for 5 hours to obtain a fluorine-containing block copolymer.

[0039] B. Preparation of Superhydrophobic Coatings

[0040] 1. Nano-TiO with amino groups on the surface 2 pr...

Embodiment 2

[0048] Embodiment 2: the molecular weight of fluorine-containing block copolymer is 12000, and the structure is:

[0049]

[0050] where m=70, n=8.

[0051] A. Preparation of fluorine-containing block copolymer:

[0052] Add GMA 14.22g (0.1mol), EBiB 0.2774g (0.001422mol), CuBr 2 0.0122g (5.0×10 -5 mol), PMDETA 0.08665g (5.0×10 -4 mol), AIBN 0.1232g (7.5×10 -4 mol), 7.11 g of toluene, after mixing uniformly, nitrogen was passed for 1 h, and reacted in an oil bath at 70° C. for 5 h. After the conversion rate reached 80%, a light yellow viscous product was obtained. Then, 2.778 g (0.0111 mol) of hexafluorobutyl methacrylate (HFBMA) was added into the reaction vessel, and the reaction was continued for 5 hours to obtain a fluorine-containing block copolymer.

[0053] B. Preparation of Superhydrophobic Coatings

[0054] 1. Preparation of nano-ZnO with amino groups on the surface

[0055] Add 0.3g KH550, 5g nano-ZnO, and 50g ethyl acetate into the reactor, stir the reacti...

Embodiment 3

[0062] Embodiment 3: the molecular weight of fluorine-containing block copolymer is 15000, and the structure is:

[0063]

[0064] where m=84, n=9.

[0065] A. Preparation of fluorine-containing block copolymer:

[0066] Add GMA 14.22g (0.1mol), EBiB 0.2311g (0.001185mol), CuBr 2 0.0122g (5.0×10 -5 mol), PMDETA 0.08665g (5.0×10 -4 mol), AIBN 0.1232g (7.5×10 -4 mol), 7.11 g of toluene, after mixing uniformly, nitrogen was passed for 1 h, and reacted in an oil bath at 70° C. for 5 h. After the conversion rate reached 80%, a light yellow viscous product was obtained. Then, 4.444 g (0.0111 mol) of dodecafluoroheptyl methacrylate (DFHMA) was added into the reaction vessel, and the reaction was continued for 5 hours to obtain a fluorine-containing block copolymer.

[0067] B. Preparation of Superhydrophobic Coatings

[0068] 1. Nano-SiO with amino groups on the surface 2 preparation of

[0069] 0.60g KH550, 10g nano-SiO 2 1. 50 g of ethyl acetate was added to the reacto...

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Abstract

The invention relates to a superhydrophobic coating. The superhydrophobic coating comprises the following ingredients by mass percent: 5-15% of fluorine-containing segmented copolymer, 65-85% of an amino nanometer or micron material, and 10-20% of resin, wherein the fluorine-containing segmented copolymer is a copolymer containing a monomer and a fluorine-containing acrylic acid monomer; the monomer is a mixture of an epoxy acrylate monomer or an epoxy acrylate monomer and an acrylate monomer. The invention further relates to a preparation method of the superhydrophobic coating. The preparation method comprises the steps of preparing the fluorine-containing segmented copolymer, preparing the amino nanometer or micron material, and preparing the superhydrophobic coating. The superhydrophobic coating and the preparation method disclosed by the invention have the following benefits: (1) the molecular weight of the fluorine-containing segmented copolymer is controllable, the molecular weight is narrow in distribution, and the molecular structure and the molecular composition are controllable; (2) the chemical bond interaction between the polymer and the nanoparticles is provided, so that the superhydrophobic coating has the advantages of the nanoparticles and the high molecular compound, and the dispersibility and the stability in the organic solvent are high; (3) the superhydrophobic coating is good in hydrophobicity, and high in comprehensive paint film property.

Description

technical field [0001] The invention relates to a superhydrophobic coating and a preparation method thereof. Background technique [0002] The wettability of the surface of solid materials is a major aspect of the surface properties of materials, and plays an important role in the fields of waterproof, oil-proof, and medical materials. In recent years, due to the self-cleaning function, anti-fouling, and anti-corrosion properties of superhydrophobic coatings, it has attracted widespread attention in ships, satellite antennas, and military radars. [0003] At present, there are two main preparation methods for superhydrophobic surfaces: (1) using low surface energy materials to prepare rough structures; (2) modifying the prepared rough surfaces to make them have low surface energy. The specific preparation methods mainly include: sol-gel method, vapor deposition method, template method, electrostatic spinning method and self-assembly method. [0004] Chinese patent applicat...

Claims

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Application Information

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IPC IPC(8): C09D153/00C09D133/00C09D167/08C09D175/04C09D7/12C08F293/00
CPCC08F220/14C08F220/18C08F220/1804C08F220/22C08F220/32C08F220/325C08F293/00C08K2201/011C09D7/62C09D153/00C08L33/00C08K9/04C08K2003/2237C08K2003/2296C08K3/36C08K2003/265C08K2003/2227
Inventor 李坚朱冠南孙建平任强汪称意
Owner CHANGZHOU UNIV
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