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Coupling method for waterborne epoxy coating and graphene oxide composite coating interfacial hyperbranched polyamide

A technology of hyperbranched polyamide and water-based epoxy coatings, applied in epoxy resin coatings, coatings, etc., can solve the problems of insignificant effect and weak pertinence, and achieves improved interface chemical reaction, improved dispersion performance, and improved water resistant effect

Active Publication Date: 2018-12-14
NANJING FORESTRY UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are obvious deficiencies in the surface modification technology of graphene oxide, and the pertinence is not strong and the effect is not significant.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] First, take 5 grams of graphene oxide and 52 grams of diethylenetriamine and mix them evenly, ultrasonically disperse them for more than 20 minutes, add them into a three-necked flask equipped with a stirrer, slowly add 50 grams of succinic anhydride, and react at about 50°C for 1 hour, Nitrogen protection, stop stirring, heat up to 130 degrees to melt polycondensation reaction for more than 3 hours, cool down to about 90 degrees, add water to form a dispersion, centrifuge, wash, and configure 1% of graphene oxide grafted with hyperbranched polyamide in situ Concentrated dispersion, spare. Then, weigh the water-based epoxy emulsion and curing agent according to the epoxy equivalent and active hydrogen equivalent 1:1, add graphene oxide grafted with hyperbranched polyamide at a mass ratio of 0.2%, stir evenly, spray on the tinplate, and dry completely at room temperature Test performance. Compared with the graphene oxide grafted hyperbranched polyamide, the water resist...

Embodiment 2

[0018] First, take 5 grams of graphene oxide and 52 grams of diethylenetriamine and mix them evenly, ultrasonically disperse them for more than 20 minutes, add them into a three-necked flask equipped with a stirrer, slowly add 50 grams of succinic anhydride, and react at about 50°C for 1 hour, Nitrogen protection, stop stirring, heat up to 130 degrees to melt polycondensation reaction for more than 3 hours, cool down to about 90 degrees, add water to form a dispersion, centrifuge, wash, and configure 1% of graphene oxide grafted with hyperbranched polyamide in situ Concentrated dispersion, spare. Then, weigh the water-based epoxy emulsion and curing agent according to the epoxy equivalent and active hydrogen equivalent 1:1, add graphene oxide grafted with hyperbranched polyamide at a mass ratio of 0.5%, stir evenly, spray on the tinplate, and dry completely at room temperature Test performance. Compared with the graphene oxide grafted hyperbranched polyamide, the water resist...

Embodiment 3

[0020] First, take 5 grams of graphene oxide and 73 grams of polyethylene polyamine and mix evenly, ultrasonically disperse for more than 20 minutes, add it to a three-necked flask equipped with a stirrer, slowly add 50 grams of succinic anhydride, and react at about 50 ° C for 1 hour, Nitrogen protection, stop stirring, heat up to 130 degrees to melt polycondensation reaction for more than 3 hours, cool down to about 90 degrees, add water to form a dispersion, centrifuge, wash, and configure 1% of graphene oxide grafted with hyperbranched polyamide in situ Concentrated dispersion, spare. Then, weigh the water-based epoxy emulsion and curing agent according to the epoxy equivalent and active hydrogen equivalent 1:1, add graphene oxide grafted with hyperbranched polyamide at a mass ratio of 0.5%, stir evenly, spray on the tinplate, and dry completely at room temperature Test performance. Compared with graphene oxide grafted hyperbranched polyamide, the water resistance, salt w...

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Abstract

The invention discloses a coupling method for a waterborne epoxy coating and graphene oxide composite coating interfacial hyperbranched polyamide. The method is characterized in that graphene oxide grafted with hyperbranched polyamide in situ is obtained on the basis of a polycondensation reaction of carboxy group on the surface of the graphene oxide and the hyperbranched polyamide; furthermore, abundant amino groups at the ends of hyperbranched polyamide molecules participate in curing of the waterborne epoxy coating to realize the coupling of the waterborne epoxy coating and the graphene oxide. According to the graphene oxide interfacial hyperbranched polyamide, on the one hand, the dispersity of the graphene oxide is improved; on the other hand, interfacial chemical reaction is improved. The method has the advantages that the action of water, saline water, acid and alkali is remarkably isolated from that of hydrophilic groups and base materials in the coating, and the properties such as water resistance, saline water resistance, acid and alkali resistance and the like in the coating are improved.

Description

technical field [0001] The invention relates to a water-based epoxy coating / graphene oxide composite coating interface coupling method, and belongs to the field of water-based epoxy composite coating interface treatment. Background technique [0002] Epoxy resin refers to the general term for a class of substances that contain two or more epoxy groups in one molecule and can be cured to form a three-dimensional network structure. With excellent mechanical properties, good resistance to chemical corrosion, small shrinkage and good stability, it is widely used in electronics, electrical, machinery manufacturing, chemical anticorrosion, aerospace, shipping and many other industrial fields. Since epoxy resin is only soluble in organic solvents and insoluble in water, most epoxy resins commonly used in industry are solvent-based. In recent years, with the gradual strengthening of people's awareness of environmental protection, environmentally friendly waterborne epoxy coatings h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D7/65C08G83/00
CPCC08G83/001C09D7/65C09D163/00C08L87/005
Inventor 崔举庆方楚奇许亮亮袁朗冯尚瑞施春燕王毓彤韩书广贾翀
Owner NANJING FORESTRY UNIV
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