Preparation method of high-adhesion high-corrosion-resistant fluorinated graphene coating

A fluorinated graphene, high corrosion resistance technology, applied in coatings, devices for coating liquid on the surface, anti-corrosion coatings, etc., can solve the problem of reducing the surface energy of organic coatings, affecting the long-term protection of coatings, reducing coating and Solve problems such as the bonding strength of the metal matrix to achieve the effects of improving the arrangement, good corrosion inhibition, and enhancing the bonding strength

Pending Publication Date: 2020-07-28
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the introduction of fluorinated graphene tends to reduce the surface energy of the organic coating, thereby reducing the bonding strength between the coating and the metal substrate, seriously affecting the long-term protection of the coating on the metal substrate.

Method used

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  • Preparation method of high-adhesion high-corrosion-resistant fluorinated graphene coating
  • Preparation method of high-adhesion high-corrosion-resistant fluorinated graphene coating
  • Preparation method of high-adhesion high-corrosion-resistant fluorinated graphene coating

Examples

Experimental program
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Embodiment 1

[0050] (1) Preparation of silane hydrolysis solution: first add 140mL of deionized water to the beaker, then add 40mL of methanol, stir evenly on a magnetic stirrer, then add 20mL of γ-epoxypropyltrimethoxysilane, 0.2g Cerium nitrate and 0.2 g of butyl titanate were stirred evenly, then phytic acid was added dropwise to adjust the pH value of the solution to 3.5, and the solution was thoroughly mixed by ultrasonic vibration for 5 minutes, then placed in a constant temperature water bath at 35°C, and hydrolyzed for 48 hours to obtain a silane hydrolysis solution;

[0051] (2) Preparation of fluorinated graphene modified epoxy resin: epoxy resin, fluorinated graphene and diluent are mixed according to the mass ratio of 10:0.3:8, wherein the diluent is xylene and n-butanol, according to 2: The mass ratio of 1 is mixed. Ball mill and stir for 0.5h, add 80g of polyamide 650 curing agent for every 100g of epoxy resin E-44, stir for 10min, and vacuumize to obtain fluorinated graphene...

Embodiment 2

[0063] (1) Preparation of silane prehydrolysis solution: first add 120mL of deionized water to the beaker, then add 50mL of methanol, stir evenly on a magnetic stirrer, then add 10ml of γ-epoxypropyltrimethoxysilane and 20ml of γ -Aminopropyltrimethoxysilane, 0.4g benzotriazole and 0.1g butyl titanate, stir evenly, then add phytic acid dropwise to adjust the pH value of the solution to 4, use ultrasonic vibration for 5min to fully mix, and place at 35 ℃ in a constant temperature water bath, hydrolyze for 20 hours to obtain a silane hydrolysis solution;

[0064] (2) Preparation of fluorinated graphene modified epoxy resin: epoxy resin, fluorinated graphene and diluent are mixed according to the mass ratio of 10:0.8:10, wherein the diluent is xylene and n-butanol, according to 2: The mass ratio of 1 is mixed. Ball mill and stir for 0.5h, add 40g of polyamide 651 curing agent per 100g of epoxy resin E-44, stir for 10min, and vacuumize to obtain fluorinated graphene modified epox...

Embodiment 3

[0069] (1) Preparation of silane pre-hydrolysis solution: first add 100mL of deionized water to the beaker, then add 30mL of methanol and 30mL of ethanol, stir evenly on a magnetic stirrer, then add 20ml of γ-epoxypropyltrimethoxysilane And 20ml bis-1,2 (triethoxysilyl) ethane, 0.2g sodium dodecylsulfonate and 0.1g butyl titanate, stir evenly, then add dropwise phytic acid to adjust the pH value of the solution to 4.5, Use ultrasonic vibration for 5 minutes to fully mix, then place in a 35°C constant temperature water bath, and hydrolyze for 12 hours to obtain a silane hydrolysis solution;

[0070] (2) Preparation of fluorinated graphene modified epoxy resin: epoxy resin, fluorinated graphene and diluent are mixed according to the mass ratio of 10:0.1:5, wherein the diluent is xylene and n-butanol, according to 2: The mass ratio of 1 is mixed. Ball mill and stir for 0.5h, add 46.4g of polyamide 651 curing agent for every 100g of epoxy resin E-51, stir for 10min, and vacuumize...

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Abstract

The invention discloses a preparation method of a high-adhesion high-corrosion-resistant fluorinated graphene coating. The preparation method of the high-adhesion high-corrosion-resistant fluorinatedgraphene coating comprises the following steps of uniformly mixing a silane coupling agent, alcohol, a corrosion inhibitor, butyl titanate and deionized water so as to form mixed liquor; then adjusting a pH value of the mixed liquor to range from 3 to 5; then after uniformly mixing by adopting ultrasonic oscillation, hydrolyzing for 12 to 72h at 25 to 50 DEG C, and obtaining a silane hydrating solution; mixing epoxy resin, fluorinated graphene and a diluent, ball-milling and stirring for 0.5 to 10h, then adding a curing agent, uniformly mixing, and obtaining fluorinated graphene modified epoxyresin; soaking a pretreated metal matrix in the silane hydrating solution for 30 to 120s, and then drying and curing; and coating the fluorinated graphene modified epoxy resin with the thickness ranging from 30 to 200mum on the surface of the silanized metal matrix, then drying and curing, and obtaining the high-adhesion high-corrosion-resistant fluorinated graphene coating. The fluorinated graphene coating obtained through the method has high corrosion resistance, the bonding strength of the coating and the metal matrix is improved, and the metal matrix can be protected for a long time.

Description

technical field [0001] The invention belongs to the technical field of heavy-duty anti-corrosion coatings in marine environments, and in particular relates to a preparation method of a high-adhesion and high-corrosion-resistant fluorinated graphene coating. Background technique [0002] Organic coatings have become one of the most important anti-corrosion methods in the marine field. Fluorinated graphene is the carbon atoms sp of graphene by fluorination 2 hybridized into sp 3 hybridized, and retain part of the sp of graphene 2 structure. Fluorinated graphene not only retains the characteristics of graphene's two-dimensional planar structure, but also has the characteristics of low surface energy, strong hydrophobicity and high stability endowed by fluorine-carbon bonds, making it both graphene and Teflon materials. Structural and performance characteristics. Therefore, fluorinated graphene has wider application prospects than graphene in the fields of corrosion resista...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D1/18B05D3/00B05D3/02B05D7/14B05D7/24C09D5/08C09D163/00
CPCB05D1/18B05D7/14B05D7/24B05D3/002B05D3/0254C09D163/00C09D5/08C08K3/042
Inventor 窦宝捷林修洲赵世雄方治文张颖君高秀磊付英奎黄公铭黎泰
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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