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A kind of conductive anticorrosion coating containing graphene and preparation method thereof

A conductive anti-corrosion and graphene technology, which is applied in the field of conductive anti-corrosion coatings and their preparation, conductive anti-corrosion coatings containing graphene and their preparations, can solve the film-forming performance of coatings or the impact of conductive anti-corrosion, affect the effect of graphene materials, heavy metals Ions pollute the environment and other problems, and achieve the effect of long salt spray resistance, low cost and high hardness

Active Publication Date: 2021-08-24
SHANDONG OBO NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, people adopt different methods to reduce the corrosion of metals. Among them, anti-rust pigments and anti-corrosion coatings containing Pb, Cr, Zn are widely used in the field of anti-corrosion, but heavy metal ions such as Pb, Cr, Zn pollute the environment seriously, and some are still It has carcinogenic effect. With the promotion of green environmental protection and the shortage of resources, these will gradually reduce their use. Seeking a safe, non-toxic and practical anti-corrosion coating has become a new trend in the field of anti-corrosion
[0004] In recent years, coating products containing graphene materials have gradually been reported. However, in practical applications, graphene still has many problems and constraints, such as graphene is easy to agglomerate, especially as a flexible material. , when mixed with hard materials in conductive anti-corrosion coatings, such as zinc powder, chrome powder or lead powder, agglomeration is more likely to occur, which directly affects the effect of graphene-based materials in coatings
Although a lot of research has been done to improve the dispersion effect of graphene by adding different types of dispersants or modification methods, there are cumbersome steps and additional impurities will be introduced, which will have a negative impact on the film-forming performance or conductive anti-corrosion of subsequent coatings.

Method used

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  • A kind of conductive anticorrosion coating containing graphene and preparation method thereof
  • A kind of conductive anticorrosion coating containing graphene and preparation method thereof
  • A kind of conductive anticorrosion coating containing graphene and preparation method thereof

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preparation example Construction

[0090] The present invention also provides a kind of preparation method of conductive anticorrosion paint, comprises the following steps:

[0091] 1) After mixing highly conductive graphene slurry, epoxy resin, anti-sedimentation agent, anti-rust agent, dispersant, coupling agent and solvent, and then grinding to obtain the first component of the conductive anti-corrosion coating;

[0092] After mixing the curing agent, accelerator and solvent again, the second component of the conductive anticorrosive coating is obtained;

[0093] The auxiliary agent includes one or more of a dispersant, an anti-settling agent, an antirust agent, a coupling agent, a curing agent and an accelerator.

[0094] The present invention can correspond to the selection and composition of the raw materials required in the above-mentioned preparation process, as well as the corresponding optimization principles, and the selection and composition of the corresponding raw materials in the aforementioned c...

Embodiment 1

[0146] Highly Conductive Graphene

[0147] The raw material is 1000 mesh natural graphite (Qingdao Dongkai Graphite Co., Ltd.). Mix and disperse 10 g of graphite and 50 g of sodium dihydrogen carbonate in 100 g of water, stir the mixture mechanically, react at room temperature for 20 hours, add 400 g of water to dilute, and centrifuge to obtain intercalated graphite. The intercalated graphite was placed in a muffle furnace at 1000 °C and expanded for 30 s. 5g of expanded graphite was dispersed in 5LN-methylpyrrolidone, 800W ultrasonic stripping for 8h, 300rmp ball milling for 2h, centrifugal washing and drying to obtain highly conductive graphene.

[0148] The highly conductive graphene prepared in Example 1 of the present invention was characterized.

[0149] see figure 1 , figure 1 Atomic force microscope photo of the highly conductive graphene prepared in Example 1 of the present invention.

[0150] Depend on figure 1 The atomic force microscope photos show that the g...

Embodiment 2

[0165] 1, get the highly conductive graphene slurry 5g that embodiment 1 prepares, and mass concentration is 1%;

[0166] 2. Add 19.3g epoxy resin E20, 2.5g anti-settling agent 3300, 15.5g oily antirust agent, 0.3g dispersant propylene carbonate, 0.3g silane coupling agent, 9g of solvent (mixed solvent of xylene n-butanol), stirred at a speed of 1000-3000r / min until uniformly dispersed, and dispersed for 1h.

[0167] 3. Put the mixture obtained in step 2 into a three-roll machine and grind it to 25-55 μm to obtain component A.

[0168] The preparation method of component B of conductive anti-corrosion coating is as follows:

[0169] 4. Mix xylene and n-butanol in a weight ratio of 7:3 to make 15g of mixed solvent.

[0170] 5. Add 10g of polyamide 200 curing agent and 0.5g of DMP-30 accelerator to step 4 in sequence, and stir at a speed of 500-1000r / min until uniformly dispersed to obtain component B.

[0171] The paint film of the conductive anticorrosion coating containing...

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Abstract

The invention provides a conductive anticorrosion coating, which comprises 15-25 parts by weight of epoxy resin, 3-10 parts by weight of high-conductivity graphene slurry, 15-35 parts by weight of solvent and auxiliary agent in terms of mass fraction. The invention also provides a preparation method of the conductive anticorrosion paint. The present invention uses high-conductivity graphene material, combined with other components, supplemented with specific ratio and formula, completely replaces metal or metal ion fillers, so that high-conductivity graphene can be uniformly dispersed in the coating, greatly improving the Conductive properties and coating properties can also realize the layer-by-layer superposition of graphene, exert its shielding effect, and better protect. The present invention adopts physical composite methods such as ultrasound with simple process, so that the graphene is evenly distributed in the coating, without adding other additives, and reduces the introduction of impurities, thereby preparing a highly conductive and highly anti-corrosion graphene conductive anti-corrosion coating. Simple operation, safe and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of anti-corrosion coatings, and relates to a conductive anti-corrosion coating and a preparation method thereof, in particular to a graphene-containing conductive anti-corrosion coating and a preparation method thereof. Background technique [0002] Graphene is a new material with a single-layer sheet structure composed of carbon atoms. As a two-dimensional crystal composed of carbon atoms with only one atomic thickness, it is currently the thinnest in the application field. material and the strongest material, the breaking strength is 200 times higher than that of steel, and it has good elasticity, and the stretching range can reach 20% of its own size; at the same time, graphene also has excellent electrical conductivity, which can reduce the inner In addition, graphene is almost completely transparent, absorbing only 2.3% of light, and is so dense that even the smallest gas atoms (helium atoms) cannot pen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D5/24C09D5/08C09D7/80
CPCC08K3/04C08K5/109C08K5/54C08K7/24C08K9/02C09D5/08C09D5/24C09D163/00
Inventor 李伟铭张在忠赵永彬程金杰刘海波
Owner SHANDONG OBO NEW MATERIAL CO LTD
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