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Super-hydrophobic and super-oleophobic epoxy resin coating and preparation method thereof

An epoxy resin coating, super-hydrophobic and super-oleophobic technology, applied in the direction of coating, etc., can solve the problems of poor micro-nano particle interface compatibility, no super-hydrophobicity, etc., to improve super-hydrophobic and super-oleophobic ability, good Adhesive strength and effects of less by-products

Pending Publication Date: 2021-05-25
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of superhydrophobic superoleophobic epoxy resin coating and preparation method thereof in order to overcome the defective that above-mentioned prior art exists, not only solve the problem that traditional epoxy resin does not have superhydrophobicity, solve simultaneously Solved the problem of poor interfacial compatibility between micro-nano particles and ordinary epoxy resin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Add 100ml of mixed solvent of deionized water and ethanol to the reactor, the volume ratio of the two is 1:1, and the original nano-SiO 2 5g, 5g of perfluorodecyltrimethoxysilane, stirred and reacted at room temperature for 10h. Filter the solution to remove the solvent, wash the solid product with distilled water and ethanol and dry it fully, place the solid product in an oven at 80°C for 2 hours to dry the water and ethanol solvent to obtain the modified nano-SiO 2 . Micron SiO 2 It is commercially available white carbon black.

[0047] Pour dodecafluoroheptyl methacrylate 4g, glycidyl methacrylate 4g, pentaerythritol tetra-3-mercaptopropionate 4g and 0.05g photoinitiator into the reactor, and add 30-200ml solvent (acetone) Ultrasonic dissolution for 15min. The ultrasonically dissolved liquid was reacted under the light source for 2 hours, and dried in a vacuum oven for 1 hour to remove the solvent to prepare a fluorinated modified epoxy resin.

[0048] 0.75g mo...

Embodiment 2

[0050] Dissolve 1 g of polyvinylpyrrolidone in 10 ml of n-pentanol under ultrasonication. Then add 0.28ml of deionized water, 1ml of absolute ethanol, 0.1ml of 180mM sodium citrate solution, and 0.17ml of 28wt% ammonium hydroxide solution. The reaction mixture was stirred for one minute to combine all ingredients. After the mixture was left to stand for 5 minutes to release air bubbles, 0.06ml TEOS was added, shaken gently for 30 seconds, hydrolyzed at room temperature for 24 hours, and dried by centrifugation to obtain micron-sized silica rods. Disperse the silica rods in ethanol to obtain a concentration of 5 mg / mL -1 The solution. At room temperature, an appropriate amount of water was slowly added to 1 ml of the ethanol solution of the silica rod. Shake gently for 30 minutes and incubate at 75°C for 2 hours to obtain micron-sized SiO 2 Flower particles.

[0051] The preparation of fluorinated modified epoxy resin is the same as example 1.

[0052] Add 100ml of mixed ...

Embodiment 3

[0055] Add 0.0375M hexamethylenetetramine solution to 0.025m zinc nitrate hexahydrate aqueous solution, ultrasonically dissolve, mix and stir in an oil bath at 95°C for 2 hours, centrifuge the suspension, filter, wash with water, and then dry it in an oven at 80°C. Micron-scale flower-shaped ZnO particles can be obtained.

[0056] Add 100ml of deionized water and ethanol mixed solvent into the reactor, the volume ratio of the two is 1:1, 5g of the synthesized micron flower ZnO, 10g of perfluorooctanoic acid, and stir the reaction at room temperature for 10h. The solution was filtered to remove the solvent, the solid product was washed with distilled water and ethanol and fully dried, and the solid product was placed in an oven at 80°C for 2 hours to dry the water and ethanol solvent to obtain the modified micron flower-shaped ZnO.

[0057] Pour 15 g of trifluorooctyl methacrylate, 2 g of glycidyl methacrylate, 4 g of pentaerythritol tetra-3-mercaptopropionate and 0.1 g of phot...

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Abstract

The invention relates to a super-hydrophobic and super-oleophobic epoxy resin coating and a preparation method thereof. The super-hydrophobic and super-oleophobic epoxy resin coating comprises the following components in parts by weight: 10 parts of fluorinated modified epoxy resin; nano particles accounting for 1-30% of the mass of the fluorinated modified epoxy resin; micron particles accounting for 1-30% of the mass of the fluorinated modified epoxy resin; a curing agent accounting for 5-50% of the mass of the fluorinated modified epoxy resin; a solvent, 3-20ml of the solvent being added into each gram of the fluorinated modified epoxy resin; and a hydrophobic modifier of which the mass is 1-2 times of the addition mass of the nano or micron particles. Compared with the prior art, the water contact angle of the coating is greater than 155 degrees, the contact angles with glycerol and ethylene glycol are greater than 150 degrees, the contact angle with diiodomethane is greater than 135 degrees, the adhesive force of the coating is the optimal level of 0, the coating does not fall off under the adhesion of an adhesive tape, and the coating is a super-hydrophobic and super-oleophobic coating with strong adhesive force and long service life, has excellent friction resistance, acid and alkali resistance and icing resistance, and has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of superhydrophobic materials, and in particular relates to a superhydrophobic superoleophobic epoxy resin coating and a preparation method thereof. Background technique [0002] Materials with a contact angle of more than 150° and a rolling angle of less than 10° on the surface of the material are called superhydrophobic materials, which have excellent hydrophobicity and self-cleaning ability. The anti-pollution of pipelines has a wide range of applications, and it also has broad application prospects in anti-icing, antibacterial, and anti-pollution fibers. [0003] To construct a superhydrophobic surface, two basic conditions must be met, namely, low surface energy and a micro-nano rough structure on the surface. The methods for constructing superhydrophobic surfaces mainly include template method, etching method, chemical deposition method, and sol-gel method. The currently prepared superhydrophobic sur...

Claims

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Application Information

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IPC IPC(8): C09D133/16C09D7/62
CPCC08K2003/2248C08K2201/011C09D133/16C09D7/62C09D7/70C08K9/06C08K7/26C08K7/18C08K9/04C08K7/00C08K3/22
Inventor 余若冰黄小烨
Owner EAST CHINA UNIV OF SCI & TECH
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