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Modified graphite nanoflake heavy anti-corrosion coating and preparation method thereof

A graphene nanosheet, heavy-duty anti-corrosion technology, applied in anti-corrosion coatings, coatings, polyurea/polyurethane coatings, etc., can solve the problems of high degree of cross-linking, high cost, poor corrosion resistance, etc., and improve the degree of cross-linking. , good compactness, good resistance to electrochemical corrosion

Active Publication Date: 2017-11-24
SHANGHAI MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a modified graphene nanosheet heavy-duty anti-corrosion coating and a preparation method thereof, which solves the problems of high cost and poor corrosion resistance in the prior art, and its impedance value can reach 10 7 ~10 9 Ω, and the coating has a high degree of cross-linking, which meets the performance requirements of heavy-duty anti-corrosion coatings

Method used

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  • Modified graphite nanoflake heavy anti-corrosion coating and preparation method thereof
  • Modified graphite nanoflake heavy anti-corrosion coating and preparation method thereof
  • Modified graphite nanoflake heavy anti-corrosion coating and preparation method thereof

Examples

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Effect test

Embodiment 1

[0041] Step 1: Weigh 0.1g graphene nanosheets, and 0.2g sodium dodecylbenzenesulfonate in 10mL ultrapure water for 12 hours, filter, and dry at 70°C for 4 hours to obtain modified graphene nanosheets;

[0042] Step 2: Ultrasound the modified graphene nanosheets in 2mL of acetone for 30min, add them to 10g of acrylic polyurethane resin, add 3g of indene, add 3 drops of dibutyltin dilaurate (drying agent), mix well and let stand for 30min ~2h, after the acetone is completely volatilized, it is coated on the surface-treated metal surface, and the preparation is completed after natural drying for 24h.

Embodiment 2

[0044] Step 1: Weigh 0.2g graphene nanosheets, and 0.4g sodium dodecylbenzenesulfonate in 10mL ultrapure water for 12h, filter, wash with ethanol and water and dry to obtain modified graphene nanosheets;

[0045] Step 2: Ultrasound the modified graphene nanosheets in 3mL xylene for 30min, add them to 10g acrylic polyurethane resin, add 3g oxyindene, add 4 drops of dibutyltin dilaurate, mix well and let stand until the xylene volatilizes Finally, it is coated on the surface-treated metal surface and dried naturally for 48 hours to complete the preparation.

Embodiment 3

[0047] Step 1: Weigh 0.3g graphene nanosheets, and 0.6g sodium dodecylbenzenesulfonate in 10mL ultrapure water for 12h, filter, wash with ethanol and water and dry to obtain modified graphene nanosheets;

[0048] Step 2: Ultrasound the modified graphene nanosheets in 5mL of ethanol for 30min, add them to 10g of acrylic polyurethane resin, add 3g of indene, add 5 drops of dibutyltin dilaurate, mix well and let stand until the ethanol is completely volatilized , coated on the surface-treated metal surface, and dried naturally for 48 hours to complete the preparation.

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Abstract

The invention discloses a modified graphite nanoflake heavy anti-corrosion coating and a preparation method thereof. The coating is prepared from the following components of acrylate polyurethane resin, a graphene nanoflake, a modifier, benzofuran and a drier at the mass ratio of 100:(1-5):(2-10):(30-50):(0.1-0.3). According to the heavy anti-corrosion coating, hydroxyl in the acrylate polyurethane resin is combined with the modified graphene nanoflake, so that oxygen-containing functional groups in the system are increased, and thus the cross-linking degree of the coating is improved, the impedance value of the coating can reach 10<7>-10<9>ohm and the coating has good electrochemical corrosion resistance.

Description

technical field [0001] The invention relates to an anti-corrosion coating, in particular to a modified graphene nanosheet heavy-duty anti-corrosion coating and a preparation method thereof. Background technique [0002] Marine corrosion is a common problem faced by the world today. It is engulfing my country's offshore engineering facilities at an alarming rate, threatening the safety of offshore engineering facilities all the time, and greatly hindering the pace of my country's marine economic development. Among all anti-corrosion measures, the use of organic coating protection, that is, anti-corrosion coatings, is the most widely used, most economical and most convenient method. Heavy-duty anti-corrosion coatings refer to a class of anti-corrosion coatings that can be applied in relatively harsh corrosive environments and have a longer protection period than conventional anti-corrosion coatings. [0003] The acrylic polyurethane system is widely used due to its good flexi...

Claims

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Application Information

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IPC IPC(8): C09D175/14C09D5/08C09D7/12
CPCC08K3/04C08K7/00C08K9/04C08K2201/011C09D5/08C09D175/14
Inventor 刘景榕刘涛郭娜郭章伟尹衍升类延华
Owner SHANGHAI MARITIME UNIVERSITY
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