Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Water-based nanosheet composite coating as well as preparation method and application thereof

A composite coating and nanosheet technology, applied in anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve problems such as inability to protect metal substrates, accelerated penetration, lack of efficient dispersion of water-based epoxy coatings, and achieve good physical barrier effect. , Guarantee the effect of isolation effect

Active Publication Date: 2021-11-26
SUN YAT SEN UNIV
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although waterborne epoxy coatings have been commercialized for more than 40 years, waterborne epoxy coatings cannot provide long-term protection for metal substrates, especially in highly corrosive environments, because waterborne epoxy systems are usually in The epoxy main chain or side chain contains hydrophilic groups or segments, which will accelerate the H 2 O, O 2 and other corrosive media penetration
At present, some research plans are to add graphene and other nano-sheets to the water-based coatings, which can effectively delay the corrosion medium from reaching the metal surface, so as to improve the above defects and achieve high-efficiency anti-corrosion; Dispersion, but there is still a lack of efficient dispersion technology for waterborne epoxy coatings

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Water-based nanosheet composite coating as well as preparation method and application thereof
  • Water-based nanosheet composite coating as well as preparation method and application thereof
  • Water-based nanosheet composite coating as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] An embodiment of the water-based nano-sheet composite coating and its preparation method and application of the present invention, the preparation method of the water-based nano-sheet composite coating comprises the following steps:

[0039] (1) Add 75 mg of boron nitride powder, a two-dimensional nanosheet material with a size of 0.5 to 50 μm, and 0.1 g of urushiol derivatives into 2.5 g of deionized water, and obtain a boron nitride nanosheet dispersion after ultrasonic treatment for 4 hours;

[0040] (2) Add 10g WTE-51 type water-based epoxy resin in the nanosheet dispersion, and make it stir evenly by mechanical stirring; finally add 5Gwh115 type polyamide curing agent, put it into the defoamer quickly after stirring for 5 minutes, Set the rotation speed to 1500r / min, vacuum degree to 95.8kPa and defoam for 15min to obtain the water-based nanosheet composite coating.

[0041] The metal product used in this example is a Q235 carbon steel sheet with a specification of...

Embodiment 2

[0047] An embodiment of the water-based nano-sheet composite coating and its preparation method and application in the present invention, the difference between this embodiment and Example 1 is that the two-dimensional nano-sheet material is graphene with a size of 0.5-50 μm.

[0048] Application and testing are carried out to the water-based nanosheet composite coating obtained in the present embodiment, and the application and testing method are the same as in Example 1, and the test results are as follows: figure 2 shown.

[0049] From figure 2 It can be seen that the coating of pure waterborne epoxy resin coating is soaked in 3.5wt% NaCl aqueous solution for 15 days |Z| f＝0.01Hz 1.33×10 7 Ω·cm 2 , Urushiol derivative-modified boron nitride nanosheets / waterborne composite coating after soaking in 3.5wt% NaCl aqueous solution for 15 days |Z| f＝0.01Hz is 1.77×10 8 Ω·cm 2 , significantly improving the corrosion resistance of the coating.

Embodiment 3

[0051] An embodiment of the water-based nano-sheet composite coating of the present invention and its preparation method and application, the difference between this embodiment and Example 1 is that the two-dimensional nano-sheet material is tungsten disulfide with a size of 0.5-50 μm .

[0052] Application and testing are carried out to the water-based nanosheet composite coating obtained in the present embodiment, and the application and testing method are the same as in Example 1, and the test results are as follows: image 3 shown.

[0053] From image 3 It can be seen that the coating of pure waterborne epoxy resin coating is soaked in 3.5wt% NaCl aqueous solution for 15 days |Z| f＝0.01Hz 1.33×10 7 Ω·cm 2 , Urushiol derivative-modified boron nitride nanosheets / waterborne composite coating after soaking in 3.5wt% NaCl aqueous solution for 15 days |Z| f＝0.01Hz is 7.08×10 8 Ω·cm 2 , significantly improving the corrosion resistance of the coating.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
sizeaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a water-based nanosheet composite coating, and belongs to the field of water-based coatings. A urushiol derivative is used as a modifier in the raw material components of the product to anchor and modify the two-dimensional nanosheets, so that the two-dimensional nanosheets are effectively dispersed in the water-borne epoxy resin, and the modified nanosheets can fully play a maze effect when the coating is used, so that a good physical barrier effect is achieved; the path of a corrosive medium entering the coating is greatly prolonged; in addition, catechol groups contained in the urushiol derivative can effectively passivate the protected metal and alloy, so that a compact oxidation film is formed on the surface of the metal and alloy, and the metal substrate is effectively protected. The invention further discloses a preparation method and an application of the water-based nanosheet composite coating.

Description

technical field [0001] The invention relates to the field of water-based coatings, in particular to a water-based nanosheet composite coating and a preparation method and application thereof. Background technique [0002] Epoxy coatings are widely used for corrosion protection of metals due to their excellent corrosion resistance, electrical insulation and strong adhesion to metal substrates. At present, epoxy coatings used in industry for metal corrosion protection are mainly Solventborne epoxy coating. However, the solvent-based epoxy resin coatings in the prior art contain a certain proportion of volatile substances, which have caused great harm to the environment and human health. In recent years, with the emphasis on human health and environmental protection, waterborne epoxy coatings have attracted widespread attention and are considered as potential substitutes for solvent-based epoxy coatings. However, although waterborne epoxy coatings have been commercialized for...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/02C09D5/08
CPCC09D163/00C09D5/08C08K2201/011C08K2003/385C08K9/04C08K3/38
Inventor 顾林孙九龙
Owner SUN YAT SEN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com