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Preparation method of aromatic diamine modified graphene oxide epoxy resin coating

A graphene epoxy resin and aromatic diamine technology, applied in the field of preparation of aromatic diamine modified graphene oxide epoxy resin coatings, can solve the problems of weak non-covalent bond stability, poor graphene oxide structural stability and the like , to achieve the effect of convenient industrial production, low cost, and solving agglomeration

Inactive Publication Date: 2021-12-07
NANTONG UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent No.: 202010834362.6 Although it discloses a preparation method of poly-p-phenylenediamine-graphene modified epoxy resin anti-corrosion coating, p-phenylenediamine is attached to the surface of graphene by π-π interaction, but the non-covalent bond weak stability, resulting in poor structural stability of non-covalently modified graphene oxide

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  • Preparation method of aromatic diamine modified graphene oxide epoxy resin coating
  • Preparation method of aromatic diamine modified graphene oxide epoxy resin coating
  • Preparation method of aromatic diamine modified graphene oxide epoxy resin coating

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Embodiment 1

[0032] see Figure 1 to Figure 4 , the technical solution provided by the present invention is the preparation of p-phenylenediamine-modified graphene oxide powder: small pieces of graphene oxide are prepared by an improved Hummers method, and a 1 mg / mL graphene oxide aqueous dispersion is prepared. Add 1.014g p-phenylenediamine to 200mL graphene oxide aqueous dispersion, adjust the pH value of the solution to 11, and react at 70°C for 6h. After the reaction, the reaction product was washed with deionized water several times until a colorless and transparent raffinate was obtained. Finally, the product was uniformly dispersed by ultrasonic, and vacuum freeze-dried to obtain p-phenylenediamine-modified graphene oxide powder.

[0033] Preparation of composite epoxy coating: Weigh 1.275g of p-phenylenediamine-modified graphene oxide powder and ultrasonically disperse it in 498.725g of deionized water to obtain a p-phenylenediamine-modified graphene oxide aqueous dispersion. 300...

Embodiment 2

[0036]Preparation of o-phenylenediamine-modified graphene oxide powder: small pieces of graphene oxide were prepared by the improved Hummers method, and a 1 mg / mL graphene oxide aqueous dispersion was prepared. Add 0.5576g o-phenylenediamine into 200mL graphene oxide aqueous dispersion, adjust the pH value of the solution to 10, and react at 65°C for 6h. After the reaction, the reaction product was washed with deionized water several times until a colorless and transparent raffinate was obtained. Finally, the product was uniformly dispersed by ultrasonic, and vacuum freeze-dried to obtain o-phenylenediamine-modified graphene oxide powder.

[0037] Preparation of composite epoxy coating: Weigh 1.7 g of o-phenylenediamine-modified graphene oxide powder, and ultrasonically disperse it in 498.3 g of deionized water to obtain an aqueous dispersion of o-phenylenediamine-modified graphene oxide. 300g of emulsion, 500g of o-phenylenediamine-modified graphene oxide aqueous dispersion ...

Embodiment 3

[0040] Preparation of m-phenylenediamine-modified graphene oxide powder: small pieces of graphene oxide were prepared by the improved Hummers method, and a 1 mg / mL graphene oxide aqueous dispersion was prepared. Add 0.5068g m-phenylenediamine into 200mL graphene oxide aqueous dispersion, adjust the pH value of the solution to 11, and react at 70°C for 6h. After the reaction, the reaction product was washed with deionized water several times until a colorless and transparent raffinate was obtained. Finally, the product was uniformly dispersed by ultrasonic, and vacuum freeze-dried to obtain m-phenylenediamine-modified graphene oxide powder.

[0041] Preparation of composite epoxy coating: 1.36 g of m-phenylenediamine-modified graphene oxide powder was weighed, ultrasonically dispersed in 498.64 g of deionized water, and an aqueous dispersion of m-phenylenediamine-modified graphene oxide was obtained. 300g of emulsion, 500g of m-phenylenediamine-modified graphene oxide aqueous ...

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Abstract

The invention provides a preparation method of an aromatic diamine modified graphene oxide epoxy resin coating, and belongs to the technical field of metal surface corrosion prevention. According to the technical scheme, the preparation method comprises the following steps: step 1, preparing aromatic diamine modified graphene oxide powder; and step 2, preparing the composite epoxy coating. The method has the beneficial effects that: the process is simple, the corrosion resistance of the prepared coating is greatly improved, and meanwhile, the overall hardness, adhesive force and flexibility of the coating are improved.

Description

technical field [0001] The invention relates to the technical field of metal surface anticorrosion, in particular to a preparation method of an aromatic diamine-modified graphene oxide epoxy resin coating. Background technique [0002] The annual global economic loss caused by metal corrosion accounts for about 3% to 5% of global GDP. At the same time, metal corrosion may also reduce the mechanical properties of materials such as strength, plasticity and toughness, and then destroy the geometric shape, and even lead to catastrophic engineering structures. destroy. Therefore, improving the anti-corrosion performance of metal materials is an important task to be solved urgently. [0003] Organic coatings can act as barrier coatings, reducing the exposure of metal substrates to corrosive substances. At present, there are many kinds of organic coatings, such as epoxy resin, polyurethane, polyphenylene sulfide and chlorinated polyether resin. Among them, epoxy resins are widel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/08C09D7/62
CPCC09D163/00C09D5/08C09D7/62C08K9/04C08K3/042
Inventor 瞿建刚刘薇薇李瑶陈豪杰曹力文赵颖
Owner NANTONG UNIVERSITY
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