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Preparation method and application of graphene-based coating for marine equipment

A graphene-based coating technology, applied in coatings, anti-corrosion coatings, biocide-containing paints, etc., can solve the problems of insufficient compactness and anti-corrosion performance, and achieve excellent anti-corrosion and improved anti-corrosion properties Effect

Active Publication Date: 2018-04-10
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the increasingly stringent requirements for environmental protection, new inorganic anti-corrosion coatings such as silica are the focus of research and development, but a single silica coating has problems such as compactness and insufficient anti-corrosion performance.

Method used

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  • Preparation method and application of graphene-based coating for marine equipment
  • Preparation method and application of graphene-based coating for marine equipment

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preparation example Construction

[0014] The preparation method of graphene-based coating of the present invention comprises the following steps successively:

[0015] (A) Prepare a coating comprising at least 11wt%-20wt% orthosilicate, 0.01wt%-2wt% graphene derivatives, water and ethanol.

[0016] (B) preparing a coating on the surface of the base material by at least one method of spraying, dipping, and brushing the coating;

[0017] (C) drying the coating on the surface of the base material at a temperature of 100-400°C.

[0018] The graphene derivatives in the coating of the present invention are graphene oxide, graphene oxide balls, graphene oxide sheets, graphene oxide quantum dots, graphene, graphene-like, graphene microchips, graphene quantum dots, and nano graphite sheets At least one of them, more preferably a graphene oxide sheet. The content of the graphene derivative is 0.05wt%-1wt%, more preferably 0.1wt%-0.5wt%. Particle size distribution of graphene derivatives D 10 ~D 90 It is 5 μm to 50 ...

Embodiment 1

[0023] Preparation of graphene oxide: Add 500ml of concentrated sulfuric acid, 10g of sodium nitrate, 60g of potassium permanganate and 10g of graphite into the reactor in sequence, stir at room temperature, add 80°C hot water dropwise into the reactor at a constant speed, and wait until the heat release is complete , add hydrogen peroxide until no more bubbles are generated, and end the reaction; peel off by ball milling at 250 rpm for 5 hours, and centrifugally wash until the solution is neutral to obtain a graphene oxide dispersion. The particle size distribution D of the prepared graphene oxide 10 ~D 90 It is 1 μm to 10 μm, and the median thickness is 1 nm.

[0024] The preparation of silica sol: join ethyl orthosilicate in 100g dehydrated alcohol, stir 1h, be solution A; Mix 100g ethanol and 200g deionized water and adjust pH with hydrochloric acid to be 3, be solution B; Whilst stirring Slowly add solution B dropwise to solution A, and continue stirring for 1 h after t...

Embodiment 2

[0028] Different from Example 1, the content of graphene oxide in the graphene-based coating is 0.05wt%, and the particle size distribution of graphene oxide is D 10 ~D 90 It is 5 μm to 15 μm, and the median thickness is 10 nm.

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Abstract

The invention provides a preparation method of a graphene-based coating. The preparation method of the graphene-based coating comprises the following steps of first preparing paint at least containing 11 to 20 percent (by weight) of ethyl orthosilicate, 0.01 to 2 percent (by weight) of graphene derivative, water and ethyl alcohol; afterwards, preparing the paint into a coating on the surface of a base material by at least one method of spray coating, dip coating and brush coating; further, drying the coating on the surface of the base material at a temperature of 100 DEG C to 400 DEG C. The graphene-based coating prepared by the preparation method of the graphene-based coating has excellent characteristics of corrosion resistance, an antifouling property, environmental friendliness and the like, moreover, is controllable in process, and can be applied to surface coatings of marine devices for submarine ships, deep-sea drilling, maritime monitoring, reef island piers and the like.

Description

technical field [0001] The invention belongs to the field of coating preparation, and more relates to a preparation technology of graphene-based coating. Background technique [0002] Ships, yachts, offshore platforms, islands, reefs, bridge piers, wind power generation, seawater desalination, ocean monitoring and other marine equipment have long been operating in high-salt, high-humidity, rich in organisms and even high-pressure coastal shallow or deep sea environments, high pressure, high salt, etc. Surface protection such as sealing, anti-corrosion, and anti-bioadhesion in special environments is one of the key technologies of marine equipment, and it is also a worldwide problem. With the increasingly stringent environmental protection requirements, new inorganic anti-corrosion coatings such as silica are the focus of research and development, but a single silica coating has problems such as compactness and insufficient anti-corrosion performance. Graphene is the latest ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00C09D7/63C09D5/08C09D5/16
CPCC09D1/00C09D5/08C09D5/1687
Inventor 张易宁陈素晶
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI