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Preparation method for modified graphene

A technology of graphene and graphene powder, which is applied in the field of graphene, can solve problems such as easy agglomeration, poor compatibility, and affecting the performance of filled polymers, and achieve the effects of improved compatibility, good compatibility, and low cost

Inactive Publication Date: 2018-08-14
广西高企科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Graphene has hydrophilic groups on its surface and is polar, while most of the polymers are hydrophobic, and the compatibility between the two is poor; at the same time, due to the small particle size of graphene, it is easy to agglomerate during processing. Ultimately affects the properties of filled polymers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method of modified graphene, comprising the following steps:

[0028] S1: Add graphene to ethanol, and ultrasonically stir for 30 minutes at a temperature of 60°C and a rotation speed of 300r / min to obtain a graphene suspension with a concentration of 200mg / mL;

[0029] S2: adding to the graphene suspension is the first surface treatment agent that is 5% by weight of graphene, and the first surface treatment agent is composed of sodium stearate and alkylphenol polyoxyethylene ether sulfuric acid with a mass ratio of 3:1 Composed of sodium, ultrasonically stirred for 45 minutes at a temperature of 70°C and a speed of 400r / min to complete the first surface modification of graphene;

[0030] S3: suction-filter the graphene obtained in the first modification in step S2, dry at 80° C. in a chain-belt dryer, and grind to obtain graphene powder;

[0031] S4: Transport the graphene powder obtained in step S3 to a high-speed mixer, control the temperature of the m...

Embodiment 2

[0033] A preparation method of modified graphene, comprising the following steps:

[0034] S1: Add graphene into ethylene glycol, and ultrasonically stir for 20 minutes at a temperature of 70°C and a rotation speed of 500r / min to obtain a graphene suspension with a concentration of 300mg / mL;

[0035] S2: adding to the graphene suspension is the first surface treatment agent that is 4% by graphene weight, and the first surface treatment agent is composed of sodium laurate and sodium alkylphenol polyoxyethylene ether sulfate with a mass ratio of 2:1 Composition, ultrasonic stirring for 60 minutes at a temperature of 60°C and a rotational speed of 300r / min to complete the first surface modification of graphene;

[0036] S3: Suction-filtering the graphene obtained in the first modification in step S2, drying in a chain-belt dryer at 100° C., and grinding to obtain graphene powder;

[0037] S4: Transport the graphene powder obtained in step S3 to a high-speed mixer, control the te...

Embodiment 3

[0039] A preparation method of modified graphene, comprising the following steps:

[0040] S1: Add graphene to ethanol and tetrahydrofuran, and ultrasonically stir for 30 minutes at a temperature of 50°C and a rotation speed of 300r / min to obtain a graphene suspension with a concentration of 150mg / mL;

[0041] S2: adding to the graphene suspension is the first surface treatment agent that is 5% by weight of graphene, and the first surface treatment agent is composed of sodium palmitate and alkylphenol polyoxyethylene ether sodium sulfate with a mass ratio of 4:1 Composition, ultrasonic stirring for 40min at a temperature of 70°C and a rotational speed of 500r / min to complete the first surface modification of graphene;

[0042] S3: suction-filter the graphene obtained in the first modification in step S2, dry at 90° C. in a chain-belt dryer, and grind to obtain graphene powder;

[0043] S4: Transport the graphene powder obtained in step S3 to a high-speed mixer, control the te...

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Abstract

The invention discloses a preparation method for modified graphene. The method comprises the following steps: adding graphene to a solvent, and ultrasonic-stirring to obtain graphene suspension liquid; adding a first surface active agent formed by saturated fatty acid saponification solution and alkylphenol polyoxyethylene ether sodium sulfate, ultrasonic-stirring, and finishing first surface modification of the graphene; leaching the obtained graphene after the modification, drying, and grinding to obtain graphene powder; conveying the graphene powder to a high-speed mixer, adding a second surface treating agent formed by distearyl ethylene oxide epoxy propyl chloride and diamide sulfonyl betaine ester, uniformly stirring at high speed, discharging, and drying to obtain the modified graphene. The method is capable of giving the hydrophobic and oleophilic surface characteristics to the graphene, blocking the agglomeration between graphene particles, and rapidly and uniformly dispersingthe graphene in other systems. In addition, groups, such as fatty acid chains, carbonyls, sulfo-groups, amide groups, ester groups, and alkyl ether groups, are loaded on the surface of the graphene,the compatibility between the graphene and a polymer is improved.

Description

technical field [0001] The invention relates to the technical field of graphene, in particular to a preparation method of modified graphene. Background technique [0002] Graphene is a carbon atom with SP 2 The honeycomb planar film formed by hybridization is a quasi-two-dimensional material with only one atomic layer thickness. Due to its extremely high specific surface area, high electrical and thermal conductivity, high charge mobility, and excellent mechanical properties, graphene is widely used in aerospace, battery materials for new energy batteries, sensors, nanoelectronics, and high-performance nanoelectronics. Devices, composite materials, field emission materials, gas sensors and energy storage have broad application prospects. [0003] Graphene has hydrophilic groups on its surface and is polar, while most of the polymers are hydrophobic, and the compatibility between the two is poor; at the same time, due to the small particle size of graphene, it is easy to ag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/46C09C3/10C09C3/08C08K9/04C08K3/04
CPCC09C1/46C01P2006/22C08K3/042C08K9/04C08K9/08C09C3/006
Inventor 梁杰锋黄启归
Owner 广西高企科技有限公司