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A heat-resistant and wear-resistant nano-hybrid epoxy coating

A kind of epoxy coating, nano technology, applied in epoxy coating, coating and other directions, can solve the problems of insufficient stiffness, poor wear resistance, low temperature resistance level, etc.

Active Publication Date: 2021-02-26
浙江中科应化科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, epoxy cured products cured by short-chain aliphatic amines usually have problems such as insufficient rigidity, poor wear resistance, and low temperature resistance.
For the surface of some parts that are welded during installation and washed by sand during use, it is obvious that aliphatic amine cured epoxy resin cannot meet the requirements of use

Method used

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  • A heat-resistant and wear-resistant nano-hybrid epoxy coating
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  • A heat-resistant and wear-resistant nano-hybrid epoxy coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] First, the graphite or graphene material is oxidized by the Hummers method to obtain graphene oxide. 0.2 g of graphene oxide was ultrasonically dispersed in 100 ml of tetrahydrofuran solution for 15 minutes, and a graphene oxide colloidal solution was obtained after ultrasonic dispersion.

[0068] Then add 0.4 g of maleic anhydride to the graphene oxide colloidal solution, and ultrasonically disperse for 15 minutes. The graphene oxide / maleic anhydride / THF mixture was irradiated in a Co-60 source with a radiation dose of 40 kGy and a dose rate of 25 Gy / min. The modified graphene oxide is obtained after the insoluble matter in the mixed solution after irradiation is suction-filtered, washed to neutrality and dried.

[0069] Weigh 0.2 g of modified graphene oxide, soak in 1 mmol / L KOH aqueous solution and 1 mmol / L hydrochloric acid solution for 5 minutes and 10 minutes respectively for hydrolysis. After the product was suction-filtered and washed with deionized water to ...

Embodiment 2

[0076] Get the graphene material (structure such as figure 2 shown), the surface density of amino groups was measured to be 12.6nmol / cm 2 , added to 100ml of toluene and stirred evenly, then added 100g of epoxy resin E51 and stirred evenly to obtain a heat-resistant and wear-resistant nano-hybrid epoxy coating, and then sprayed on the surface of a steel sheet to prepare a test sample, dried and cured at room temperature for 24 hours. After testing, the thermal decomposition temperature of the cured coating reaches 335° C., and the wear rate during sand erosion is 1.6 μm / a (sand content 2%, water velocity 5 m / s).

Embodiment 3

[0078] Get the graphene material (structure such as image 3 shown), the surface density of amino groups was calculated to be 10.8nmol / cm 2 , added to 70ml of toluene and stirred evenly, added 50g of epoxy resin AG80 and stirred evenly to obtain a heat-resistant and wear-resistant nano-hybrid epoxy coating, and then sprayed on the surface of the steel sheet to prepare a test sample, dried and cured at room temperature for 24 hours. After testing, the thermal decomposition temperature of the cured coating reaches 363° C., and the wear rate during sand erosion is 1.3 μm / a (sand content 2%, water velocity 5 m / s).

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Abstract

The invention provides a heat-resistant and wear-resistant nano-hybridized epoxy coating. The epoxy coating contains amino-modified graphene, aromatic epoxy resin and non-reactive diluent. Compared with the prior art, the length of a carbon chain on a grafted chain is controlled, so that the liquidation and high fluidity of the amino-modified graphene are realized, and the single-layer dispersionof amino-modified graphene in a solvent and a composite material matrix is guaranteed; and meanwhile, by virtue of the characteristic of the large specific surface area of amino-modified graphene, great reactivity of amino on the surface can be realized, and the epoxy resin can be cured at the room temperature or lower; and by virtue of the doping and modification of nano-materials, the mechanicalperformance and thermal performance of an epoxy resin cured substance can be substantially improved, and the erosive wear and heat resistance of the epoxy resin cured substance are improved.

Description

technical field [0001] The invention belongs to the technical field of epoxy coatings, in particular to a heat-resistant and wear-resistant nano-hybrid epoxy coating. Background technique [0002] Epoxy resin is a compound containing two or more epoxy functional groups in the molecular chain. Due to the excellent strength, heat resistance, corrosion resistance and adhesion of the cured product, epoxy resin has been used in adhesives, coatings and The most widely used material in composite matrix resin. [0003] The metal parts of marine engineering equipment are prone to rust and failure when used in the marine environment, affecting the normal operation of parts and even the entire equipment platform. At present, the development and application of high-efficiency marine anti-corrosion technology is still an important task in the construction of marine equipment. major issues. The protection of metal parts by spraying organic coatings is very convenient in terms of constru...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D7/62
Inventor 柳美华尹园郑春柏魏巍张依帆邓鹏飏
Owner 浙江中科应化科技有限公司
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