A kind of sulfonic acid functionalized graphene dispersion system and preparation method thereof

A technology of dispersion system and sulfonic acid group, which is applied in the field of sulfonic acid group functionalized graphene dispersion system and its preparation, can solve problems such as easy agglomeration, achieve good stability and solve the effect of agglomeration

Active Publication Date: 2020-04-14
HUNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The main purpose of the present invention is to provide a sulfonic acid group functionalized graphene dispersion system and its preparation method, to solve the problem in the prior art that the sulfonic acid group functionalized graphene is easily agglomerated after being dispersed in an organic solvent

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  • A kind of sulfonic acid functionalized graphene dispersion system and preparation method thereof
  • A kind of sulfonic acid functionalized graphene dispersion system and preparation method thereof
  • A kind of sulfonic acid functionalized graphene dispersion system and preparation method thereof

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preparation example Construction

[0031] In another typical embodiment of the present application, a method for preparing a sulfonic acid group functionalized graphene dispersion system is provided, comprising the following steps:

[0032] S1: disperse the sulfonic acid group functionalized graphene in an organic solvent to obtain a sulfonic acid group functionalized graphene dispersion;

[0033] S2: adding nanocellulose into the sulfonic acid functionalized graphene dispersion obtained in step S1, stirring in a water bath and ultrasonically dispersing to obtain a sulfonic acid functionalized graphene dispersion system.

[0034] The preparation method is simple to operate, and a stable sulfonic acid functionalized graphene dispersion system can be obtained only through simple steps of mixing, stirring in a water bath and ultrasonic dispersion.

[0035]In order to further improve the stability of the obtained sulfonic acid functionalized graphene dispersion system, before adding the nanocellulose into the sulfo...

Embodiment 1

[0048] A kind of preparation method of sulfonic acid functionalized graphene dispersion system, comprises the following steps:

[0049] (1) Add the sulfonic acid group functionalized graphene powder into N-methylpyrrolidone, mechanically stir for 20min and then ultrasonically vibrate for 2h to obtain a sulfonic acid group functionalized graphene-N-methylpyrrolidone dispersion, wherein The massfraction of sulfonic acid functionalized graphene is 10%;

[0050] (2) Dissolve 1g of nanocellulose particles in 90g of water, stir in a water bath at a constant temperature of 45°C for 12h until completely dissolved, then add 2mL of KH560 silane coupling agent to modify the surface of nanocellulose, and then ultrasonically disperse for 2h to obtain a mass fraction of 1% modified nanocellulose aqueous solution, and then filtered, washed, and dried to obtain modified nanocellulose;

[0051] (3) Slowly add the modified nanocellulose into the sulfonic acid group functionalized graphene-N-me...

Embodiment 2

[0054] A kind of preparation method of sulfonic acid functionalized graphene dispersion system, comprises the following steps:

[0055] (1) Add the sulfonic acid group functionalized graphene powder into acetone, and then carry out ultrasonic dispersion for 2h to obtain a sulfonic acid group functionalized graphene-acetone solution, wherein the mass fraction of the sulfonic acid group functionalized graphene is 10% ;

[0056] (2) Dissolve 2g of nanocellulose particles in 98g of water, stir in a water bath at a constant temperature of 45°C for 12h until completely dissolved, then add 2mL of KH1770 silane coupling agent to modify the surface of nanocellulose, and then ultrasonically disperse for 2h to obtain the mass fraction 2% modified nanocellulose aqueous solution, and then filtered, washed and dried to obtain modified nanocellulose;

[0057] (3) Slowly add the modified nanocellulose into the sulfonic acid group functionalized graphene-acetone solution, control the addition...

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Abstract

The invention discloses a sulfonic group functionalized graphene dispersion system and a preparation method thereof. The dispersion system comprises sulfonic group functionalized graphene, nano-cellulose and an organic solvent. At least one part of the nano-cellulose is compounded to the surface of the sulfonic group functionalized graphene. The organic solvent uniformly disperses and / or dissolvesother components of the dispersion system to form a homogeneous dispersion system. The preparation method comprises dispersing sulfonic group functionalized graphene in an organic solvent to obtain asulfonic group functionalized graphene dispersion, adding the nano-cellulose into the sulfonic group functionalized graphene dispersion, and carrying out stirring in a water bath and ultrasonic dispersion. The sulfonic group functionalized graphene dispersion system reduces agglomeration. The preparation method is easy to operate.

Description

technical field [0001] The invention relates to the technical field of functionalized graphene, in particular to a sulfonic acid functionalized graphene dispersion system and a preparation method thereof. Background technique [0002] Graphene material is composed of a single layer of carbon atoms with sp 2 It is a new type of nanomaterial composed of hybridization and closely arranged honeycomb two-dimensional atomic crystals with a carbon six-membered ring structure. It has excellent mechanical properties, good electrical properties and thermal conductivity; it has broad application prospects in many fields such as multifunctional composite materials, nanoelectronic components, sensors, and energy storage materials. [0003] Sulfonate-functionalized graphene can be obtained after graphene is sulfonated. The surface of sulfonate-functionalized graphene contains a large number of sulfonate groups and oxygen-containing functional groups, has a large specific surface area, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/194
CPCC01B32/194C01B2204/20
Inventor 涂川俊邹泽玉鲜勇王卫东
Owner HUNAN UNIV
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