Graphene/azobenzene polymer composite anti-corrosive paint additive and preparation method thereof

An anti-corrosion coating, graphene technology, applied in anti-corrosion coatings, epoxy resin coatings, coatings and other directions, to expand the application field, improve dispersion, improve the effect of dispersion

Active Publication Date: 2019-05-14
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] This paper aims to solve the problem of controllable and stable dispersion of graphene in the polymer system and reduce the preparation cost. Combining the characteristics of graphene and azobenzene polymers, it provides a graphite with both corrosion inhibition and physical barrier properties. Alkene / azobenzene polymer composite anticorrosion coating additive and preparation method thereof

Method used

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  • Graphene/azobenzene polymer composite anti-corrosive paint additive and preparation method thereof
  • Graphene/azobenzene polymer composite anti-corrosive paint additive and preparation method thereof
  • Graphene/azobenzene polymer composite anti-corrosive paint additive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1. Synthesis of AZO-MAC

[0038] figure 2 It is a schematic diagram of the synthetic route of AZO-MAC. Firstly, diazotize aniline and phenol in an ice bath to obtain hydroxyazobenzene AZO-OH; secondly, carry out chain extension reaction of hydroxyazobenzene with 6-chloro-1-hexanol to obtain chain-extended The hydroxyazobenzene AZO-Cl-OH; finally, the chain-extended hydroxyazobenzene AZO-Cl-OH is reacted with methacryloyl chloride to obtain the azobenzene AZO-MAC containing double bonds.

[0039] Concrete synthesis process is as follows:

[0040] (1) Synthesis steps of AZO-OH

[0041] In a 100mL single-necked bottle, add concentrated hydrochloric acid (8mL) and deionized water (8mL), cool to 0°C, then add aniline (2.5g 0.027mol), add sodium nitrite (2g 0.029mol) in 10mL deionized water In the reaction system, keep the temperature at 0°C and continue to stir for 30 minutes, then dissolve phenol (2.5g 0.027mol) in 25mL of 10% sodium hydroxide solution, add it to the d...

Embodiment 2

[0051] 1. Synthesis of AZO-MAC

[0052] (1) Synthesis steps of AZO-OH

[0053] In a 250mL single-necked bottle, add concentrated hydrochloric acid (16mL) and deionized water (16mL), cool to 0°C, then add aniline (5g 0.054mol), add sodium nitrite (4g 0.058mol) in 20mL deionized water to react In the system, keep the temperature at 0°C, keep stirring for 30 minutes, then dissolve phenol (5g 0.054mol) in 50mL of 10% sodium hydroxide solution, add it into the diazonium salt system at a rate of two seconds per drop, and continue the reaction for 3h , Next, adjust the pH of the system to about 7, precipitation occurs, and the yellow-orange solid is filtered out and washed with deionized water several times, and finally, freeze-dried to obtain the desired product AZO-OH.

[0054] (2) Synthesis steps of AZO-Cl-OH

[0055] In a 150mL single-necked bottle, add hydroxyazobenzene AZO-OH (3.9644g 0.02mol), anhydrous potassium carbonate K 2 CO 3 (3.0406g 0.022mol), 6-chloro-1-hexanol (3...

Embodiment 3

[0063] 1. Synthesis of AZO-MAC

[0064] (1) Synthesis steps of AZO-OH

[0065] In a 100mL single-necked bottle, add concentrated hydrochloric acid (8mL) and deionized water (8mL), cool to 0°C, then add aniline (2.5g 0.027mol), add sodium nitrite (2g 0.029mol) in 10mL deionized water In the reaction system, keep the temperature at 0°C and continue to stir for 30 minutes, then dissolve phenol (2.5g 0.027mol) in 25mL of 10% sodium hydroxide solution, add it to the diazonium salt system at a rate of two seconds per drop, and continue After reacting for 6 hours, adjust the pH of the system to about 7. Precipitation occurs. The yellow-orange solid is filtered out and washed with deionized water several times. Finally, the desired product AZO-OH can be obtained by freeze-drying.

[0066] (2) Synthesis steps of AZO-Cl-OH

[0067] In a 150mL single-necked bottle, add hydroxyazobenzene AZO-OH (3.9644g 0.02mol), anhydrous potassium carbonate K 2 CO 3 (3.3170g 0.024mol), 6-chloro-1-he...

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Abstract

The invention relates to a graphene / azobenzene polymer composite anti-corrosive paint additive and a preparation method thereof. The method comprises the following steps: firstly, synthesizing a polymerizable monomer (AZO-OH) containing azobenzene, performing a chain extension reaction (AZO-Cl-OH) by using 6-chloro-1-hexanol, finally introducing a double bond by using methacryloyl chloride, to obtain an azobenzene monomer (AZO-MAC) containing the double bond; and enabling the AZO-MAC to perform free radical polymerization with glycidyl methacrylate (GMA), to obtain a random polymer (AZO-GMA);finally, because graphene is a large Pi-conjugated planar structure, and an azobenzene group is introduced into the polymer, the polymer also has the large conjugated structure, under the strong Pi-Piinteraction, the polymer can be adsorbed on a large plane of the graphene, to obtain a composite anti-corrosive paint additive AZO-GMA-GNS modified by a non-covalent bond.

Description

technical field [0001] The invention belongs to the field of anti-corrosion coatings, and relates to a graphene / azobenzene polymer composite anti-corrosion coating additive and a preparation method thereof. Background technique [0002] Heavy-duty anti-corrosion coatings generally refer to a class of anti-corrosion coatings that can be applied in relatively harsh corrosive environments such as chemical atmospheres and marine environments compared with conventional anti-corrosion coatings, and can achieve a longer protection period than conventional anti-corrosion coatings. Generally, they can be used for 10 years It can be used for more than 15 years, even in acid, alkali, salt and solvent medium, and at a certain temperature, it can be used for more than 5 years. Therefore, the development of heavy-duty anti-corrosion coatings has a high technical content and is difficult. The synthesis of high-corrosion-resistant resins, the application of high-efficiency dispersants and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/08C09D163/00C08F220/32C08F220/36
Inventor 戴李宗李奕奕许一婷王宏超李萌陈国荣曾碧榕袁丛辉罗伟昂
Owner XIAMEN UNIV
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