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A kind of graphene-modified silicon-titanium nanopolymer slurry and its preparation method and application

A nano-polymer, graphene modification technology, applied in anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve the problems of broken bonds between coatings and substrates, limited penetration resistance, and large amount of powder added. , to achieve the effect of improving compactness and mechanical properties, improving medium penetration resistance, and improving impact resistance

Active Publication Date: 2022-03-18
CHANGSHA TIANYUAN EMPIRE MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the case of direct contact with chemically corrosive media such as acids and alkaline substances, electrochemical protection mechanism coating materials are not competent
[0003] Existing coatings generally have too large coating pores, such as epoxy zinc-rich coatings (epoxy iron red, epoxy zinc phosphate, epoxy glass flakes and vinyl glass flakes, etc.), and the main internal fillers are 200-800 mesh , the fineness after grinding is above 40 microns, and the internal microscopic gap is large after the coating film is dried; at the same time, the amount of filler powder is relatively large, especially the zinc-rich type, and the maximum amount can reach more than 90%, resulting in the binder content. less, and due to the physical mixing between materials, the binder and the substrate are covalently adsorbed by hydrogen bonds, the adhesion is limited, generally only 6-10 MPa, and its anti-permeability to the medium is limited, and water vapor molecules can penetrate When the coating film reaches the metal substrate interface, it will affect or even change the adsorption mechanism of the coating, resulting in a great difference between its adhesion (wet adhesion) and the adhesion in the dry state, so that the bond between the coating and the substrate is broken and loss of adhesion
When the coating loses its wet adhesion, it will cause it to peel off from the metal substrate, affecting the protective performance of the coating

Method used

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  • A kind of graphene-modified silicon-titanium nanopolymer slurry and its preparation method and application
  • A kind of graphene-modified silicon-titanium nanopolymer slurry and its preparation method and application
  • A kind of graphene-modified silicon-titanium nanopolymer slurry and its preparation method and application

Examples

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preparation example Construction

[0048] In the present invention, the preparation method of described silane coupling agent modified graphene preferably comprises the following steps:

[0049] The graphene, propylene glycol methyl ether acetate, silane coupling agent and water are mixed and subjected to ultraviolet radiation to obtain the silane coupling agent modified graphene.

[0050] In the present invention, the silane coupling agent in the silane coupling agent modified graphene is preferably γ-aminopropyltriethoxysilane, more preferably KH-550, A-1100, Z-6011, KBE- 903 or AMEO.

[0051] In the present invention, the structural formula of the γ-aminopropyltriethoxysilane is shown in the following formula:

[0052]

[0053] In the present invention, the mass ratio of the graphene, propylene glycol methyl ether acetate, silane coupling agent and water is preferably (10~300):(5000~10000):(1~20):(1~20) , more preferably 100:7900:5:5.

[0054] In the present invention, the ultraviolet wavelength of the...

Embodiment 1

[0115] Mix 100g graphene with 7900g propylene glycol methyl ether acetate and stir evenly, add 5gKH-550 and 5g deionized water dropwise, continue to stir evenly, put the mixed solution in a 500×300mm stainless steel tray, and place it under the ultraviolet light of 254nm band Exposed to ultraviolet high-energy radiation for 60 minutes in the cleaning machine to obtain KH-550 modified graphene;

[0116] Mix 50 parts of titanium hydride (≥500 mesh), 3 parts of active silicon dioxide (2-15nm), KH-550 modified diluent (type 692 active diluent (benzyl glycidyl ether) of Anhui Xinyuan Technology Co., Ltd. active diluent)) 4 parts, N-methylpyrrolidone 5 parts, dispersant (Changshapet VK-DP345) 3 parts, coupling agent (Changshapet VK SL113) 3 parts, catalyst (mass ratio is 2: 1 nano-cerium oxide and silicon-modified nano-crystalline alumina) 0.05 parts, wetting agent (Digo 450) 0.15 parts, wetting aid (Allnex brand ADDITOLXL180 type) 0.15 parts, in the order of first liquid and then s...

Embodiment 2

[0118]The difference from Example 1 is that the raw materials are 45 parts of titanium hydride (≥500 mesh), 3 parts of active silica (2-15nm), 2 parts of KH-550 modified graphene, silicon-modified epoxy resin (active Silicon-modified novolac epoxy resin) 25 parts, reactive diluent (692 type reactive diluent (benzyl glycidyl ether reactive diluent) of Anhui Xinyuan Technology Co., Ltd.) 4 parts, N-methylpyrrolidone 5 parts , dispersant (Changshapet VK-DP345) 3 parts, coupling agent (Changshapet VK SL113) 3 parts, catalyst (mass ratio of 2:1 nano-cerium oxide and silicon-modified nano-γ crystal alumina) 0.05 part, 0.15 part of wetting agent (Digo 450), 0.15 part of wetting aid (ADDITOL XL180 type of Allnex brand), and the remaining contents are consistent with Example 1.

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Abstract

The invention belongs to the technical field of coatings, and in particular relates to a graphene-modified silicon-titanium nanometer polymer slurry and a preparation method and application thereof. The graphene-modified silicon-titanium nanopolymer slurry provided by the present invention is added to the polymer coating, and the resistance of the formed coating is greatly improved through the super-strong resistance to gas and liquid permeability of graphene and the network structure of silicon-titanium-graphene. Medium permeability; the corrosion resistance of graphene, titanium and silicon nanoparticles endows the coating with super stability, and it is not easy to react with various media such as acid, alkali and salt. The reaction produces soluble salts or cathode loose expansion products, and the coating composition and structure are stable and undamaged for a long time; the silicon-titanium-graphene network structure can improve the comprehensive anti-corrosion properties of the coating such as adhesion, hardness, toughness, wear resistance and crack resistance performance.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a graphene-modified silicon-titanium nanometer polymer slurry and a preparation method and application thereof. Background technique [0002] At present, the application of anti-corrosion coatings is mainly based on two points: the shielding of the coating and the electrochemical protection mechanism. The coating materials mainly include zinc-rich, aluminum-rich, iron red, chromate, phosphate, organic corrosion inhibitors, etc. In the case of direct contact with chemically corrosive media such as acids and alkaline substances, electrochemical protection mechanism coating materials are not competent. [0003] Existing coatings generally have too large coating pores, such as epoxy zinc-rich coatings (epoxy iron red, epoxy zinc phosphate, epoxy glass flakes and vinyl glass flakes, etc.), and the main internal fillers are 200-800 mesh , the fineness after grinding is a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D163/04C09D5/08C09D7/62C09D7/61
CPCC09D163/00C09D163/04C09D5/08C09D7/62C09D7/61C08K9/06C08K3/042C08K3/12C08K3/36C09D5/084C09D7/63C09D7/20C09D7/67C09D7/65C09D1/00
Inventor 马金华
Owner CHANGSHA TIANYUAN EMPIRE MATERIALS TECH CO LTD
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