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A kind of multifunctional additive containing graphene nanomaterial and preparation method thereof

A technology of multi-functional additives and nano-materials, applied in chemical instruments and methods, anti-corrosion coatings, carbon compounds, etc., can solve the problems of graphene's electrical conductivity and anti-corrosion performance, difficulty in dispersing uniformly, easy agglomeration of coatings, etc., to achieve applicable Wide range, improved dispersion and stability, improved anti-corrosion performance

Active Publication Date: 2022-03-04
广东源稀新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Graphene with a two-dimensional layered structure has a certain shielding effect on corrosive substances and is an ideal performance-enhancing filler for anti-corrosion coatings. However, due to the small distance between graphene sheets, it is difficult for polymers to enter Between the graphene sheets, it is easy to agglomerate in the coating and it is difficult to disperse evenly, so it is difficult to exert its anti-corrosion performance when graphene is directly added to the coating
Appropriate chemical modification of graphene can effectively improve its dispersion performance in the coating system. The preparation of graphene / polymer composites by in-situ polymerization method has uniform dispersion and high chemical bonding, but the reaction conditions are also difficult to control. Too long grafted polymer chains will lead to the disadvantages of graphene itself, such as reduced electrical conductivity and anti-corrosion properties.

Method used

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  • A kind of multifunctional additive containing graphene nanomaterial and preparation method thereof
  • A kind of multifunctional additive containing graphene nanomaterial and preparation method thereof
  • A kind of multifunctional additive containing graphene nanomaterial and preparation method thereof

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preparation example Construction

[0031] The invention provides a kind of preparation method of the multifunctional additive containing graphene nano material, comprises the following steps:

[0032] 1) Dissolving aminotoluene in a mixed solution of ethanol and water, adding sodium bicarbonate and then cooling down to 5°C, adding a dioxane solution of benzyl chloroformate and stirring at 0°C to protect the amino group;

[0033] 2) dissolving the protected aminotoluene in carbon disulfide, and oxidizing the methyl group into an aldehyde group according to the Etard reaction to obtain an intermediate product 1;

[0034]

[0035] 3) Utilize the improved Hummers method to prepare graphene oxide first, add graphene oxide and solvent DMF in the reaction flask, super make it disperse evenly, then drop 1-(3-dimethylaminopropyl)- Activate the DMF solution of 3-ethylcarbodiimide and N-hydroxysuccinimide, then add polyethylene glycol diamine and react for 24 hours at 80-100°C for amidation;

[0036] 4) Add the obtain...

Embodiment 1

[0047] Embodiment 1: according to above-mentioned preparation process, wherein polyethylene glycol diamine molecular weight 400g / mol, make modified graphene and auxiliary dispersant, get modified graphene 15g, auxiliary dispersant 10g and be dispersed in 100g water, obtain final product A multifunctional additive containing graphene nanomaterials.

Embodiment 2

[0048] Embodiment 2: according to above-mentioned preparation technique, wherein polyethylene glycol diamine molecular weight 1000g / mol, make modified graphene and auxiliary dispersant, get modified graphene 10g, auxiliary dispersant 8g and be dispersed in 100gDMF, obtain final product A multifunctional additive containing graphene nanomaterials.

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Abstract

This case involves a multifunctional additive containing graphene nanomaterials and its preparation method. Firstly, the modified Hummers method is used to expose more active sites on the surface of graphene, and then the PEG chain, imine and aniline Introduce it to the surface of graphene structure to prepare functional graphene oxide, and supplement it with anionic-nonionic dispersant with specific structure to obtain multifunctional additives containing graphene nanomaterials. In this case, a dispersant with a specific structure is used to enhance the dispersion of modified graphene in various solvent systems. The multi-armed dispersant has abundant anchoring groups, which can easily enter between graphene sheets and interact with graphene surface active groups. The group produces hydrogen bonding, adsorption, etc., and is firmly combined, not easy to settle in the solvent system, and has good stability; the dispersion medium can be a common organic solvent or water, and has a wide range of applications, which can effectively improve the anti-corrosion performance of the coating.

Description

technical field [0001] The invention relates to the field of functional nanomaterials, in particular to a multifunctional additive containing graphene nanomaterials and a preparation method thereof. Background technique [0002] Nanomaterials have five unique effects: volume effect, surface effect, quantum size effect, quantum tunneling effect, and dielectric confinement effect. They have excellent properties in optics, electricity, and mechanics, so they have attracted the attention of scientific researchers. Graphene (Gr) is a sp 2 The hybrid special nanomaterial with honeycomb crystal structure is currently the thinnest two-dimensional material known in the world. Due to its special structure, graphene has excellent physical and chemical properties. It is used in composite materials, capacitors, sensors, Coatings and other fields have a wide range of applications. [0003] Graphene with a two-dimensional layered structure has a certain shielding effect on corrosive subs...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/198C01B32/194C09D5/08
CPCC01B32/198C01B32/194C09D5/08
Inventor 陶晓辉周慧姜晔
Owner 广东源稀新材料科技有限公司