A kind of preparation method of oily dispersible modified graphene powder

A graphene powder and dispersion technology, applied in chemical instruments and methods, dyeing polymer organic compound treatment, fibrous fillers, etc., can solve the problems of poor dispersion and stability of graphene, complicated process, high cost, etc., and achieve repeatability High, mature and stable process, stable dispersion effect

Active Publication Date: 2021-02-05
ZHONGBEI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at solving the existing problems of poor dispersibility and stability of graphene in non-polar organic solvents, complex process, high energy consumption and high cost, and provides a method for preparing modified graphene powder that can be oily dispersed

Method used

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  • A kind of preparation method of oily dispersible modified graphene powder
  • A kind of preparation method of oily dispersible modified graphene powder
  • A kind of preparation method of oily dispersible modified graphene powder

Examples

Experimental program
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Effect test

Embodiment 1

[0028] The first step, the preparation of PVP-GO water dispersion solution:

[0029] Take the graphene oxide aqueous solution in a 250ml beaker, adjust the pH value to 8, then blend and ultrasonically disperse PVP (K=12~30) for 10 minutes and let it stand for a while (the mass ratio of GO:PVP is 2:3).

[0030] The second step, the preparation of polymer microspheres @ (PVP-rGO) powder:

[0031] Transfer the PVP-GO solution to a 250ml three-neck flask, weigh styrene (St) or methyl methacrylate (MMA), initiator (mass ratio K 2 S 2 o 8 :NaHSO 3 =1:1), feed into the three-neck flask at one time; pass N 2 Or protected by argon and placed in a 70°C water bath for 5 hours; then heated up to 90°C for condensing and reflux reduction with hydrazine hydrate for 2 hours, the solution gradually turned gray black, and the reduction product was filtered through filter paper (or high-speed centrifugation 8000~12000r / min ) to remove unloaded polymer microspheres, and then dry them in a va...

Embodiment 2

[0034] The adjustment of pH value 8 in the first step in Example 1 was changed to use 5% NaOH solution to wash the styrene monomer. All the other processes are as described in Example 1.

Embodiment 3

[0036] The mass ratio K described in the second step 2 S 2 o 8 :NaHSO 3 =1:1 is changed to 1:1~3, and all the other processes are as described in Example 1.

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Abstract

A method for preparing oily-dispersible modified graphene powder, which belongs to the technical field of graphene, can solve the problem of poor dispersibility and stability of graphene in non-polar organic solvents, complicated process, high energy consumption, and high cost. For high problems, first use GO aqueous solution as raw material, adjust GO aqueous solution to alkaline, add PVP to prepare GO aqueous stable dispersion; secondly, add polymer monomer (such as styrene, methyl methacrylate, etc.) at a certain temperature, Initiator, in situ polymerized loaded polymer microspheres on the surface of PVP modified GO, and after further thermal reduction, water was removed by spraying (hot and cold drying) to obtain modified graphene powder. These modified graphene powders can be dispersed in non-polar organic solvents under the action of ultrasound. The preparation process of the present invention is simple, and the prepared modified powder oily dispersion has high concentration, excellent dispersibility and stability, and accelerates the engineering application of graphene in fields such as anticorrosion.

Description

technical field [0001] The invention belongs to the technical field of graphene, and specifically relates to a preparation method of a modified graphene powder that can be oily dispersed. The invention adopts a chemical method to regulate the surface structure of graphene to reduce the interaction force between graphene powders , while increasing the wettability and compatibility between graphene and organic solvents, improving the dispersion and stability of graphene in organic solvents. Background technique [0002] The application prospects and advantages of graphene anti-corrosion coatings are mainly in the application of marine heavy-duty anti-corrosion coatings. Whether it can be widely used depends on whether it can be produced in low-cost and stable batches, and secondly, whether it can replace imported heavy-duty anti-corrosion coatings in the marine environment. get applied. In order to realize the multiple functions of graphene in heavy-duty anti-corrosion coatin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/00C09C3/10C01B32/194
CPCC09C1/00C09C3/10C01B32/194
Inventor 孙友谊陈贺齐春红刘亚青赵贵哲
Owner ZHONGBEI UNIV
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