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Graphene-based coating and preparation method thereof

A graphene-based, graphene-based technology, applied in coatings, anti-corrosion coatings, anti-fouling/underwater coatings, etc., can solve problems such as poor anti-corrosion performance and poor compactness, and achieve excellent anti-corrosion effects.

Active Publication Date: 2018-11-06
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

However, a single titanium dioxide coating has poor compactness and often has poor anti-corrosion performance in practical applications.

Method used

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  • Graphene-based coating and preparation method thereof
  • Graphene-based coating and preparation method thereof

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preparation example Construction

[0018] The preparation method of graphene-based coating of the present invention comprises the following steps successively:

[0019] (A) prepare at least 2wt%~10wt% n-tetrabutyl titanate, 0.01wt%~0.1wt% graphene derivatives, 0.1wt%~1wt% aluminum sulfate, 0.01wt%~0.1wt% surfactant, water and isopropanol coatings;

[0020] (B) preparing a coating on the surface of the base material by at least one method of spraying, dipping, and brushing the coating;

[0021] (C) drying the coating on the surface of the base material at a temperature of 350 to 400°C;

[0022] The size of the graphene derivative in the step (A) coating of the present invention has a significant impact on the coating and coating properties, and the particle size distribution of the graphene derivative in the coating is D 10 ~D 90 1 μm to 100 μm, and the median thickness of the graphene derivative is 1 nm to 100 nm, more preferably 10 nm to 50 nm, more preferably 20 nm to 40 nm. If the thickness of graphene d...

Embodiment 1

[0029] 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.

[0030] Preparation of titanium dioxide sol: Add n-tetrabutyl titanate to 100g of isopropanol, stir for 1 hour to form solution A; mix 100g of isopropanol with 100g of deionized water and adjust the pH to 0 with hydrochloric acid to form solution B; while stirring Slowly add the solution B into the solution A dropwis...

Embodiment 2

[0034] The difference from Example 1 is that the content of graphene oxide in the graphene-based coating is 0.02wt%, the content of aluminum sulfate is 0.2wt%, and the content of sodium dodecylsulfonate is 0.02wt%.

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Abstract

The invention provides a preparation method of a graphene-based coating. The preparation method comprises the following steps: firstly, preparing a coating material which comprises at least 2 wt% to 10 wt% of n-tetrabutyl titanate, 0.01 wt% to 0.1 wt% of a graphene derivative, 0.1 wt% to 1 wt% of aluminum sulfate, 0.01wt% to 0.1wt% of a surfactant, water and isopropyl alcohol; then preparing the coating by applying the coating material to a surface of a base material by at least one methods of spraying, dip-coating and brushing; and further drying the coating on the surface of the base material at a temperature of 350 to 400 DEG C. The graphene-based coating provided by the invention has the characteristics of excellent corrosion resistance, pollution resistance, environmental protection and the like, is controllable in process, and can be applied to surface coating protection of building structural materials, ship and yacht manufacturing, marine monitoring equipment, new energy vehicles, aerospace conveyers 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] The rapid development of national economic construction depends on the wide application of various metal materials in construction, machinery, ships, automobiles, etc. However, metal corrosion seriously affects the service life of various metal materials, and brings huge hidden dangers to safe production and life. It is a worldwide problem to realize effective protection against metal corrosion. Titanium dioxide is an oxide with extremely stable chemical and physical properties. The material itself is resistant to acid and alkali corrosion. At the same time, due to its low price, new inorganic anti-corrosion coatings with titanium dioxide as the main body or added with titanium dioxide are research and development hotspots; Titanium dioxide has better alkali resistance than the silica coating...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D5/16C09D5/08
CPCC09D1/00C09D5/08C09D5/1687
Inventor 张易宁陈素晶王维林长新李歆
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI