Preparation device and preparation method of high-orientation two-dimensional nanometer material macroscopic body

A two-dimensional nanomaterial and a technology for preparing a device, which are applied in the field of a preparation device for a macroscopic body of a highly oriented two-dimensional nanomaterial

Inactive Publication Date: 2020-10-27
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, the use of gradient temperature field (ie, ice template method) can promote the orientation of graphene sheets. Some existing studies have been able to regulate the microstructure of graphene macroscopic bodies in one direction (such as the Z-axis direction). , but is disordered in the other two directions (XY direction)

Method used

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  • Preparation device and preparation method of high-orientation two-dimensional nanometer material macroscopic body
  • Preparation device and preparation method of high-orientation two-dimensional nanometer material macroscopic body
  • Preparation device and preparation method of high-orientation two-dimensional nanometer material macroscopic body

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specific Embodiment approach 1

[0037] A preparation device for a highly oriented two-dimensional nanomaterial macroscopic body, including a pump body 1, a refrigerator 2, a freezing chamber 3, a temperature control system 4, and a solution tank 5, and the solution tank 5 passes through the inlet of the pipeline I6 and the pump body 1 The outlet end of the pump body 1 communicates with the front end of the freezing chamber 3 through the pipeline II7. The freezing chamber 3 is set with a high front and a low slope, and the rear end of the freezing chamber 3 is arranged above the solution tank 5 and It communicates with the solution tank 5 , the refrigerator 2 is arranged below the freezing chamber 3 close to or in contact with the bottom surface of the freezing chamber 3 , and the temperature control system 4 is electrically connected with the refrigerator 2 . The refrigerator 2 is a semiconductor refrigeration chip or a liquid nitrogen refrigeration device. Preferably, the semiconductor cooling chip is two d...

specific Embodiment approach 2

[0044] A method for preparing a highly oriented two-dimensional nanomaterial macrobody using the preparation device described in Embodiment 1, comprising the following steps:

[0045] Step 1: Prepare a two-dimensional nanomaterial dispersion, and place the prepared two-dimensional nanomaterial dispersion in an environment of 0-20°C for thermal equilibrium;

[0046] Step 2: Under the temperature environment where the solution is thermally balanced, the pump body 1 continuously transports the two-dimensional nanomaterial dispersion in the solution tank 5 to the freezing chamber 3, and flows from the front end of the freezing chamber 3 to the rear end, and the refrigerator 2 is used for freezing Chamber 3 continues to cool down, and the gradient temperature field provided by refrigerator 2 (the temperature gradually decreases from top to bottom) realizes the stable growth of ice crystals, and the action of fluid shear force realizes the directional arrangement of two-dimensional n...

specific Embodiment approach 3

[0051] A method for preparing a graphene macrobody using the device described in Embodiment 1. Firstly, the preparation and thermal balance of the graphene oxide dispersion are carried out, and then the graphene oxide macrobody is prepared by using a preparation device for a highly oriented two-dimensional nanomaterial macrobody. The orderly assembly of , followed by freeze-drying, and finally chemical vapor reduction to obtain highly oriented graphene macroscopic bodies, the specific steps are as follows:

[0052] Step 1: Preparation and heat balance of graphene oxide dispersion: disperse graphene oxide solution with sheet size of 5-10 μm and concentration of 10-20 mg / ml in deionized water to prepare graphene oxide of 5-15 mg / ml Dispersion liquid, the graphene oxide dispersion liquid is ultrasonically treated at a frequency of 10KHz to 100KHz for 30 to 60 minutes, and then placed in an environment of 0 to 20°C for heat balance;

[0053] Step 2: Under the temperature environme...

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Abstract

The invention discloses a preparation device and a preparation method of a high-orientation two-dimensional nanometer material macroscopic body. The invention belongs to the technical field of nanometer material macroscopic body preparation. According to the specific scheme, the preparation device of a high-orientation two-dimensional nanometer material macroscopic body comprises a pump body, a refrigerator, a freezing chamber, a temperature control system and a solution tank, wherein the solution tank is communicated with the inlet end of the pump body, the outlet end of the pump body is communicated with the front end of the freezing chamber, the freezing chamber is obliquely arranged in a high-front and low-rear mode, the rear end of the freezing chamber is communicated with the solution tank, the refrigerator is arranged below the freezing chamber and is close to or makes contact with the bottom face of the freezing chamber, and the temperature control system is electrically connected with the refrigerator. The two-dimensional nanometer material macroscopic bodies with different orientation degrees can be prepared by controlling the temperature and the inclination angle of thefreezing chamber, the size of the high-orientation two-dimensional nanometer material macroscopic body is adjusted and controlled by adjusting and controlling the size of the freezing chamber, and thedevice and the method are suitable for ordered assembly of any two-dimensional nanometer material and wide in application range.

Description

technical field [0001] The invention belongs to the technical field of preparation of nanomaterial macroscopic bodies, in particular to a preparation device and method for highly oriented two-dimensional nanomaterial macroscopic bodies. Background technique [0002] With people's attention to lightweight high-performance materials, especially the requirements for multifunctional materials in aerospace, 5G communications, wearable devices and other fields, there is a further demand for the controllable microstructure of lightweight macroscopic bodies. As a two-dimensional material, graphene has natural advantages for building macroscopic bodies. As a new type of two-dimensional nano-carbon material, graphene has a unique hexagonal crystal structure. The electrons move at nearly the speed of light, making graphene the material with the highest room temperature conductivity. In addition to electrical properties, since each carbon atom in graphene is combined with three surroun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184C01B32/198
CPCC01B32/184C01B32/198
Inventor 李宜彬林在山王沙沙
Owner HARBIN INST OF TECH
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