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Multifunctional additive containing graphene nanomaterial and preparation method of multifunctional additive

A technology of multi-functional additives and nanomaterials, 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, easy agglomeration of coatings, difficult to disperse uniformly, etc. Dispersibility and stability, improved anti-corrosion performance, wide application effect

Active Publication Date: 2021-08-20
广东源稀新材料科技有限公司
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  • Abstract
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  • 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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  • Multifunctional additive containing graphene nanomaterial and preparation method of multifunctional additive

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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

The invention relates to a multifunctional additive containing a graphene nanomaterial and a preparation method of the multifunctional additive. The preparation method comprises the following steps of: exposing more active sites on the surface of graphene through an improved Hummers method; introducing a PEG chain, imine and anilino to the surface of the graphene structure through molecular design to prepare functional graphene oxide; and using an anionic-nonionic dispersant with a specific structure to obtain the multifunctional additive containing the graphene nanomaterial. According to the multifunctional additive containing the graphene nanomaterial and the preparation method of the multifunctional additive of the invention, the dispersing agent with a specific structure is used for enhancing the dispersity of the modified graphene in various solvent systems, the multi-arm dispersing agent has abundant anchoring groups, can easily enter between graphene sheet layers, can generate hydrogen-bond interaction, adsorption and the like with active groups on the surface of the graphene, is firm in combination, is not easy to settle in the solvent systems, and is good in stability; a dispersion medium can be a common organic solvent or water, so that the application range of the multifunctional additive is wide, and the corrosion resistance of a coating can be effectively improved.

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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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
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