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Amphiphilic graphene oxide and preparation method thereof and application in waterborne coating thereof

A technology of water-based coatings and stone oxide, which is applied in the direction of epoxy resin coatings, chemical instruments and methods, anti-corrosion coatings, etc., can solve problems such as the limitation of graphene oxide, and achieve the effects of slowing down agglomeration, increasing interlayer spacing, and improving performance

Active Publication Date: 2019-09-17
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Graphene oxide with excellent unilateral hydrophilicity, although it can show good dispersion when it is first mixed, agglomeration phenomenon will inevitably occur in the later stage of paint film curing, which also makes the effect of graphene oxide affected. limit

Method used

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  • Amphiphilic graphene oxide and preparation method thereof and application in waterborne coating thereof
  • Amphiphilic graphene oxide and preparation method thereof and application in waterborne coating thereof
  • Amphiphilic graphene oxide and preparation method thereof and application in waterborne coating thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A preparation method for amphiphilic graphene oxide, comprising the steps of:

[0052] (1) Weigh 1g of 3-isocyanatopropyltrimethoxysilane into a clean dry beaker, add 0.1g of graphene oxide, seal the mouth of the beaker with a safety film to prevent air from entering, sonicate for 20min; then add 50ml of N, N -Dimethylformamide, then heated in an oil bath (105°C) and stirred magnetically for 2 hours, then centrifuged to remove the supernatant, washed the obtained solid product with ethanol for 3 times, and put it into liquid nitrogen to freeze for 10 minutes to ensure that the product was frozen After being applied, freeze-dry for 72 hours to obtain modified graphene oxide;

[0053] (2) Add the modified graphene oxide prepared in step (1) to 25ml of ethanol to make an alcoholic solution, ultrasonic 20min, and set aside;

[0054] (3) Weigh 0.03g nano-TiO 2 Add 25ml deionized water to make TiO 2 Aqueous solution, ultrasonic 20min, standby;

[0055] (4) In the case of ...

Embodiment 2

[0057] A preparation method for a water-based paint, comprising the steps of: adding the amphiphilic graphene oxide prepared in Example 1 to the water-based epoxy resin paint and stirring evenly, the addition of the amphiphilic graphene oxide is 0.1% of the water-based paint quality. %; then add the curing agent (F705), the mass ratio of the water-based epoxy resin to the curing agent is 1:2, then add the auxiliary agent, stir evenly, to obtain final product; the auxiliary agent includes: wetting agent BYK-348 , dispersant DISPERBYK-2062, leveling agent BYK-381, defoamer BYK-021, each added in an amount of 0.05wt% of the water-based paint mass.

Embodiment 3

[0059] A preparation method for water-based paint, comprising the steps of:

[0060] (1) Weigh 1.5g of 3-isocyanatopropyltrimethoxysilane into a cleaned dry beaker, add 0.13g of graphene oxide, seal the mouth of the beaker with a safety film to prevent air from entering, ultrasonic for 25min; then add 60ml of N, N-dimethylformamide, then heated in an oil bath (100°C) and stirred magnetically for 2.5 hours, then centrifuged to remove the supernatant, washed the obtained solid product with ethanol for 5 times, and put it into liquid nitrogen to freeze for 10 minutes to ensure After the product is frozen, freeze-dry for 75 hours to obtain modified graphene oxide;

[0061] (2) Add the modified graphene oxide prepared in step (1) to 35ml of ethanol to make an alcoholic solution, ultrasonic 15min, and set aside;

[0062] (3) Weigh 0.03g nano-TiO 2 Add 25ml deionized water to make TiO 2 Aqueous solution, ultrasonic 15min, standby;

[0063] (4) In the case of magnetic stirring, th...

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Abstract

The invention belongs to the technical field of waterborne coatings, and in particular relates to an amphiphilic graphene oxide and a preparation method thereof and an application in a waterborne coating thereof. The amphiphilic graphene oxide is composed of modified graphene oxide and titanium dioxide, the modified graphene oxide is composed of graphene oxide and 3-isocyanatopropyltrimethoxysilane, and titanium dioxide and graphene oxide are grafted together by 3-isocyanatopropyltrimethoxysilane. The application in a waterborne coating of the amphiphilic graphene oxide is as follows: adding the amphiphilic graphene oxide into a waterborne epoxy resin coating, and then adding a curing agent and auxiliary agents to obtain the waterborne coating. 3-isocyanatopropyltrimethoxysilane is used as a bridge to graft amphiphilic nano titanium dioxide on the surface of graphene oxide, graphene oxide is introduced into epoxy resin while dispersibility is improved, and thus anti-corrosion properties of the waterborne coating is improved.

Description

technical field [0001] The invention belongs to the technical field of water-based coatings, and in particular relates to an amphiphilic graphene oxide, a preparation method thereof and an application in water-based coatings. Background technique [0002] The information disclosed in the Background of the Invention is only intended to increase the understanding of the general background of the invention, and is not necessarily to be taken as an acknowledgment or any form of suggestion that the information constitutes the prior art that is already known to those skilled in the art. [0003] As we all know, due to the many organic functional groups attached to the surface of graphene oxide, including hydroxyl, carboxyl, epoxy, etc., this endows graphene oxide with excellent hydrophilicity and reactivity, allowing it to be used more widely. In the field of coatings, water is used as a solvent, resin is used as a film-forming substance, and the two form a uniform mixed system th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/46C09C3/06C09C3/12C09D163/00C09D7/62C09D5/08
CPCC01P2006/12C01P2006/22C09C1/46C09C3/006C09C3/06C09C3/12C09D5/08C09D163/00C09D7/62C08K9/06C08K9/02C08K3/042
Inventor 石元昌宋伯钧张师睿
Owner SHANDONG UNIV
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