Bio-based nano composite epoxy coating inspired by nacre as well as preparation method and application of bio-based nano composite epoxy coating

A nano-composite, epoxy coating technology, applied in epoxy resin coatings, anti-corrosion coatings, coatings and other directions, can solve problems such as harming the environment, not conforming to the green environmental protection concept of metal corrosion protection coatings, etc., to ensure impermeability, The effect of ensuring the availability of circular economy and excellent self-healing ability

Inactive Publication Date: 2022-05-13
广东腐蚀科学与技术创新研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the design of self-healing coatings only focuses on improving the efficiency of self-healing performance, such as: Chinese patent CN113158899 and Chinese patent CN 201410489624 have obtained an epoxy resin material based on UPy quadruple hydrogen bond repair, but choose Environmentally harmful and non-renewable epoxy resin is used as the main body of the polymer network, which does not meet the green environmental protection concept of metal corrosion protective coatings; in addition, there are many studies on the coating of imitation nacre, but most of them only focus on bionic coatings Extended barrier properties
Therefore, the biomimetic environmental protection coating system with high performance self-healing coating and shielding barrier performance based on bio-based epoxy resin has great potential for practical application, but it has not been reported yet.

Method used

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  • Bio-based nano composite epoxy coating inspired by nacre as well as preparation method and application of bio-based nano composite epoxy coating
  • Bio-based nano composite epoxy coating inspired by nacre as well as preparation method and application of bio-based nano composite epoxy coating
  • Bio-based nano composite epoxy coating inspired by nacre as well as preparation method and application of bio-based nano composite epoxy coating

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preparation example Construction

[0041] The present invention also provides the aforementioned preparation method of a kind of bio-based nano-composite epoxy coating inspired by nacre, comprising:

[0042] (1) Synthesis of GO-UPy, in some embodiments, 2-amino-4-hydroxyl-6-methylpyrimidine and hexamethylene diisocyanate (HDI) were added to a round-bottomed flask, and under nitrogen atmosphere React at high temperature for 12 hours. After cooling to room temperature, use n-hexane to wash away the unreacted HDI; then, dry the product in a vacuum drying oven overnight to obtain a white powder (UPy-NCO); then take an appropriate amount of graphene oxide (GO) and UPy-NCO were dispersed in N,N-dimethylformamide (DMF) solution, and an appropriate amount of dibutyltin dilaurate catalyst was slowly added; heated to 40°C under nitrogen atmosphere, after 24 hours of reaction, The mixture was then collected by vacuum filtration, and finally the product was washed with DMF and ethanol to obtain GO-UPy;

[0043] (2) Synthe...

Embodiment

[0049] In this embodiment, the preparation method of the bio-based nanocomposite epoxy coating inspired by nacre, the specific implementation includes the following steps:

[0050] (1) Synthesis of GO-UPy

[0051] Add 2-amino-4-hydroxy-6-methylpyrimidine (3g, 23mmol) and hexamethylene diisocyanate (HDI) (24.2g, 143mmol) into a round bottom flask, and react at 110°C under a nitrogen atmosphere for 12 Hours, after being cooled to room temperature, use n-hexane to wash away the unreacted HDI; Subsequently, the product was dried overnight in a vacuum drying oven to obtain a white powder (UPy-NCO) (6.3g, yield 93.4%); then Take 0.5g of graphene oxide (GO) and 0.1g of UPy-NCO and disperse in N,N-dimethylformamide (DMF, 100mL) solution, and slowly add dibutyltin dilaurate (0.2mL); Heated to 40°C under atmosphere, reacted for 24 hours, then collected the mixture by vacuum filtration, and finally washed the product with DMF and ethanol to obtain GO-UPy. The infrared spectra before and...

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Abstract

The invention particularly relates to a bio-based nano-composite epoxy coating inspired by a nacreous layer as well as a preparation method and application of the bio-based nano-composite epoxy coating. Graphene oxide modified by reversible quadruple hydrogen bond 2-ureido-4 [1H]-pyrimidone-isocyanate molecules is used as a hard inorganic phase, and a self-repairing bio-based epoxy polymer system is used as a soft organic phase; the self-repairing bio-based epoxy polymer system comprises bio-based cardanol epoxy resin, an isophorone diamine curing agent and isophorone diamine with 2-ureido-4 [1H]-pyrimidone (UPy) on a branched chain, and a highly homogeneous bionic layered nano-composite coating is formed through solvent evaporation and prepolymer crosslinking film formation induction. The bionic nano-composite coating prepared by the method has good mechanical property, rapid self-repairing capability and good corrosion resistance, the preparation process is simple and controllable, the raw materials are green and environment-friendly, and the bionic nano-composite coating can be widely applied to the technical field of metal surface protection of electronic devices, engineering equipment and the like.

Description

technical field [0001] The invention specifically relates to a bio-based nano-composite epoxy coating inspired by nacre and its preparation method and application, belonging to the technical field of metal surface protective coatings. Background technique [0002] The problem of metal corrosion protection is severe and demanding, and smart organic coatings have the ability to self-heal physical damage such as micro-defects and micro-cracks, which has now been proven to be very effective in extending the life of engineering coatings and improving safety and reliability. At present, it is generally believed that the hotspot strategy for constructing self-healing protective coatings is to introduce host-guest inclusion, metal coordination bonds, ionic bonds or hydrogen bonds and other supramolecular reversible interactions from the design of resin molecules. The non-covalent cross-linking sites of the network, which allows the cross-linking sites to achieve rapid reconstruction...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D7/62C09D5/08
CPCC09D163/00C09D7/62C09D5/08C08K9/04C08K3/042
Inventor 刘福春武浩韩恩厚
Owner 广东腐蚀科学与技术创新研究院
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