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A kind of superhydrophobic composite material with fluorinated epoxy resin as matrix, preparation method and superhydrophobic surface

A technology of epoxy resin and composite material, which is applied in the fields of superhydrophobic surface, preparation, and superhydrophobic composite material, which can solve the problems of weak superhydrophobic surface, difficult to work, and difficult to repeat the formation of rough texture.

Active Publication Date: 2021-04-23
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This preparation method needs to be carried out in multiple steps, the method is cumbersome, and the process stability is not good.
The formed superhydrophobic surface is not firm and easy to break, and there are no low surface energy substances (such as: various silicone rubbers) on the new surface produced by the damage, and the rough texture required for superhydrophobicity is difficult to form repeatedly, so the superhydrophobic surface is lost. Hydrophobic properties
In addition, in the rare fluorine-containing epoxy resin composite materials, fluorine compounds are mostly connected to the epoxy curing agent, so it is difficult to control the crosslinking network of the epoxy resin through different types of curing agents.

Method used

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  • A kind of superhydrophobic composite material with fluorinated epoxy resin as matrix, preparation method and superhydrophobic surface
  • A kind of superhydrophobic composite material with fluorinated epoxy resin as matrix, preparation method and superhydrophobic surface
  • A kind of superhydrophobic composite material with fluorinated epoxy resin as matrix, preparation method and superhydrophobic surface

Examples

Experimental program
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Effect test

Embodiment 1

[0044] (1) Add 22g of 2,3,5,6-tetrafluoro-tere-phenylenedimethanol, 15g of sodium hydroxide and 100g of epichlorohydrin into a 500ml three-neck flask, stir at room temperature for 20 minutes, then add 0.5 tetramethylammonium bromide g, heated up to 65°C and reacted for 120 minutes, washed with water and distilled to obtain FEP 1; Then add 5g 4,4'-diallyl bisphenol A type epoxy resin, 2.3g 1H,1H,2H,2H-perfluorodecanethiol, 0.08g photoinitiator 1173 and 3g tetrahydrofuran, under the irradiation of a 365nm UV-LED surface light source, reacted at room temperature for 3 hours, removed the solvent, and obtained FEP 2 . The reaction product can be seen by infrared figure 1 and figure 2 . FEP 2 The melting point was determined by DSC, see image 3 .

[0045] (2) First, add 2.1g of nano-silica with a particle size of 500nm and 4.2g of nano-silica with a particle size of 50nm after KH550 treatment into 20g of ethanol for 15 minutes of ultrasonication, then magnetically stir for ...

Embodiment 2

[0054] (1) Add 11g of 2,3,5,6-tetrafluoro-tere-phenylenedimethanol, 7g of sodium hydroxide and 70g of epichlorohydrin into a 250ml three-neck flask, stir at room temperature for 30 minutes, then add tetramethylammonium bromide 0.2 g, after heating up to 70°C, it generates heat by its own reaction, and the reaction temperature is maintained at 70°C for 130 minutes, and FEP is obtained after washing with water and distillation 1 ; Then add 10g 4-4'-diallyl bisphenol A epoxy resin, 4.6g 1H, 1H, 2H, 2H-perfluorodecanethiol, 0.2g photoinitiator 184 and 8g tetrahydrofuran, under the irradiation of 365nm UV-LED surface light source, react at room temperature for 3 hours, remove solvent, obtain FEP 2 .

[0055] (3) First add 1g of nano-silica with a particle size of 500nm and 2g of nano-silica with a particle size of 30nm after KH560 treatment into 15g of ethanol and sonicate for 20min, then magnetically stir for 20min to obtain a suspension, and then add 4gFEP 1 , 1gFEP 2 Add it i...

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Abstract

The invention discloses a superhydrophobic composite material with fluorine-containing epoxy resin as a matrix, a preparation method and a superhydrophobic surface. The preparation method comprises: using 2,3,5,6-tetrafluoro-tere-phenylenedimethanol and epichlorohydrin to react to obtain low-viscosity fluorine-containing epoxy resin; in the presence of a photoinitiator, 4,4'-diallyl Bisphenol A type epoxy resin and 1H, 1H, 2H, 2H-perfluorodecanethiol are photoreacted to obtain room temperature crystalline fluorine-containing epoxy resin; the nanoparticles are treated with a coupling agent, and low-viscosity fluorine-containing epoxy resin and Crystallize fluorine-containing epoxy resin at room temperature, ultrasonically disperse and stir for 2 to 3 hours. Add a curing agent to the super-hydrophobic composite material, and spray, brush or roll-coat it on the surface of the substrate to obtain a super-hydrophobic surface. The preparation method of the invention is simple and convenient, the reaction rate is fast, the preparation period is short, and the obtained composite material has stable superhydrophobic performance and no pollution.

Description

technical field [0001] The invention relates to the field of polymer material synthesis and preparation, and furthermore, relates to a superhydrophobic composite material with fluorine-containing epoxy resin as a matrix, a preparation method and a superhydrophobic surface. Background technique [0002] Superhydrophobic surfaces have a wide range of applications in waterproofing, self-cleaning, drag reduction and selective absorption, etc. Among the many methods for constructing superhydrophobic surfaces, the use of coatings is the most convenient and versatile method. The method of constructing a superhydrophobic surface is generally divided into two steps: firstly, the micro-nano rough structure is constructed by physical methods, and secondly, the surface energy is reduced by chemical modification. Laser etching, deposition, sol-gel and electrospinning are commonly used in laboratories, but none of them can be applied on a large scale. At present, many scholars are tryin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D7/62C08G59/04C08G59/14
CPCC08G59/04C08G59/1483C08K2003/2241C08K2201/011C09D163/00C09D7/62C08L63/00C08K9/06C08K3/36C08K3/22
Inventor 张军营马嘉浩程珏马天
Owner BEIJING UNIV OF CHEM TECH
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