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Sphere-like graphene oxide and preparation method and application thereof

A graphene and spherical-like technology, which is applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., can solve problems such as difficult separation, blockage and transportation, and fouling on the wall of the device, and achieve the effect of facilitating processing and transportation

Active Publication Date: 2020-02-21
中润超油(北京)新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, graphene oxide in the prior art is mostly in the form of flakes or irregular powders. In some applications, for example, graphene oxide as a carrier can maintain its shape during in-situ polymerization, and the in-situ polymerization product The shape of graphene oxide can "copy" the shape of graphene oxide. If the shape is not ideal or too fine, it is easy to form adhesion, fouling of the wall, blockage and poor transportation, and even danger; or when graphene oxide is used as When the catalyst participates in some liquid phase reactions, if it is in the form of flakes or fine powders, it will also make it difficult to separate

Method used

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  • Sphere-like graphene oxide and preparation method and application thereof
  • Sphere-like graphene oxide and preparation method and application thereof
  • Sphere-like graphene oxide and preparation method and application thereof

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preparation example Construction

[0028] The present invention relates to a kind of preparation method of spherical graphene oxide, comprises the following steps:

[0029] Spray-drying and assembling the graphene oxide material liquid obtained by uniformly dispersing the graphene oxide and the modifier to obtain the spherical-like graphene oxide;

[0030] The modifying agent is used to introduce C3-C8 hydrocarbon groups and / or substituted hydrocarbon groups, and optional aromatic groups and / or substituted aromatic groups;

[0031] In the graphene oxide feed liquid, the content of the graphene oxide is 0.05wt%-1wt%, and the content of the modifying agent is 0.03wt%-0.10wt%.

[0032] In the present invention, by controlling the number of carbon atoms of the modifier and controlling the ratio of graphene oxide and modifier, the modifier can have suitable density and length when the modifier is coupled to graphene oxide, and the molecular interaction between modifiers Moderate force can better adjust the shape of...

Embodiment 1

[0064] 1) Preparation of raw material graphene: get the graphene oxide dispersion prepared by the Hummers method, adjust the graphene oxide concentration to be 0.1wt% of the dispersion, add pentylamine to adjust its concentration to be 0.05wt% of the dispersion, ultrasonic dispersion;

[0065] 2) The modified graphene ultrafine powder is obtained through the spray drying step, the temperature is set at 210° C., the wind speed is adjusted, and the final output is 20 g / h (the wind speed is calibrated by the output).

Embodiment 2

[0067] 1) Preparation of raw graphene: get the graphene oxide dispersion prepared by the Hummers method, adjust the graphene oxide concentration to be 0.4wt% of the dispersion, add ethanolamine to adjust its concentration to be 0.05wt% of the dispersion, and ultrasonically dispersion;

[0068] 2) Through the spray drying step, the modified graphene ultrafine powder is obtained, the temperature is set at 190°C, the wind speed is adjusted, and the final output is 22g / h (the wind speed is calibrated by the output).

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Abstract

The invention relates to the technical field of preparation of graphene oxide nano-materials, in particular to a preparation method and application of sphere-like graphene oxide. The method comprises:performing spray drying assembly on a graphene oxide material liquid obtained by uniformly dispersing graphene and a modifier to obtain the sphere-like graphene oxide, wherein the modifier is used tointroduce a hydrocarbon group of C3-C8 and / or a substituted hydrocarbon group of C3-C8, and an optional aromatic group and an optional substituted aromatic group, the graphene oxide content in the graphene oxide material liquid is 0.05 wt%-1 wt%, and the modifier content is 0.03 wt%-0.10 wt% of the graphene oxide content. The sphere-like graphene oxide is prepared by the method, is more conduciveto processing and transportation, is more suitable for large-scale industrial production in the industry, and can be used in the fields such as supported catalysts and in-situ polymerization.

Description

technical field [0001] The invention relates to the technical field of preparation of graphene oxide nanomaterials, in particular to a preparation method and application of spherical-like graphene oxide. Background technique [0002] Graphene (graphene) has extremely high strength and large specific surface area, and has multiple functions at the same time, so it has been widely studied and applied in recent years. For example, when it is used as a filler for resin matrix, it not only has obvious strengthening effect [L. Valentini, 2018], can also bring many new functions to composite materials, such as electrical conductivity [Marcéo A.Milani, 2013, Jin-Yong Dong, Yuan Liu, 2015], electromagnetic shielding properties [Wei-Li Song, 2014, Sima Kashi,2016, Yu-Dong Shi,2019], dielectric properties [Zhenhong Luan,2017, Zhen-zhen He,2018], anti-icing properties [L.Valentini,S.Bittolo Bon,M.Hernández,M.A.Lopez- Manchado, N.M.Pugno, 2018] et al. [0003] Graphene can be efficient...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/198B01J21/18B01J35/08C08K7/18C08K3/04
CPCC01B32/198B01J21/18C08K7/18C08K3/042C08K2201/003B01J35/51
Inventor 党小飞郁博轩李炯利王旭东
Owner 中润超油(北京)新材料有限公司