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Airflow generating device, graphene dispersion liquid and preparation method thereof

A graphene dispersion and production device technology, applied in graphene, chemical instruments and methods, nano-carbon and other directions, can solve the problems of low solid content, low yield, reduced physical properties of graphene, etc., and achieve high solid content and high yield. rate, the effect of improving adaptability

Active Publication Date: 2020-06-09
TAIWAN TEXTILE RESEARCH INSTITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the existing graphene dispersion preparation technology, the chemical treatment process has the problems of waste water pollution such as acid-base and heavy metal waste liquid and toxic waste gas, while physical methods such as mechanical stripping, ultrasonic vibration or ball milling have inherent problems. Defects such as low content, low yield, and uneven distribution of product sheet diameter and thickness
In addition, most of the commercially available graphene dispersions have low solid content, and too much solvent will seriously affect the subsequent resin physical properties and processability, so it is not conducive to the application of graphene dispersions in the field of coatings.
In addition, the commonly used technologies to improve the suspension of graphene are surface modification or adding dispersion aids (greater than 5%), both of which will greatly reduce the physical properties of graphene, and even increase the manufacturing cost of graphene dispersions

Method used

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  • Airflow generating device, graphene dispersion liquid and preparation method thereof
  • Airflow generating device, graphene dispersion liquid and preparation method thereof
  • Airflow generating device, graphene dispersion liquid and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0054]The invention provides an airflow generating device for preparing graphene powder, a graphene dispersion and a preparation method thereof, wherein the graphene powder produced by the airflow generating device is used to prepare the graphene dispersion. Hereinafter, details of the airflow generating device, graphene dispersion and preparation method thereof of the present invention will be described in detail.

[0055]

[0056] figure 1 is a cross-sectional view of the airflow generating device, and figure 2 for figure 1 A three-dimensional schematic diagram of a rotating awl. Please also refer to figure 1 and figure 2 , the airflow generating device 100 includes an outer bushing 110 and a rotating awl 120 , wherein the outer bushing 110 has a chamber 112 , an air inlet opening 114 and an air outlet opening 116 . The air inlet opening 114 communicates with the lower side of the chamber 112 and the air outlet opening 116 communicates with the upper side of the cha...

experiment example

[0090] In order to prove that the graphene dispersion of the present invention has a relatively high solid content and suspending property, this experimental example is specially made below.

[0091] It must be noted that since the preparation method of the graphene dispersion has been described in detail above, therefore, the preparation details of the graphene dispersion will be omitted for convenience.

[0092] Preparation of graphene dispersion

[0093] According to the above-mentioned preparation method of the graphene dispersion of the present invention, the graphene dispersions of Examples 1 to 21 were prepared with the composition conditions and process conditions listed in Table 1 below. In Table 1, the mixing ratio (G / S) represents the ratio of graphene / solvent (Graphene / Solvent).

[0094] Table 1

[0095]

[0096] Evaluation 1: Characteristic Evaluation of Graphene Dispersion

[0097] For the graphene dispersion made in example 1 to example 21, measure the ave...

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Abstract

An air flow generating device, a graphene dispersion, and a preparation method thereof are provided. The graphene dispersion is formed by a graphene powder and a processing solvent, wherein the graphene in the graphene dispersion has an average diameter of 0.5 um to 1 um, 3 to 5 layers, a solid content of 5% to 50%, and a residue oxygen content less than 1 wt %, and after being left to stand for 12 hours, the graphene dispersion has a distribution concentration increasing from the top section to the bottom section of the storage container, a viscosity of 5000 cps to 8000 cps, and a graphene concentration of 20 wt %.

Description

technical field [0001] The invention relates to an airflow generator, a graphene dispersion and a preparation method thereof, in particular to an airflow generator for preparing low-oxygen graphene powder, a graphene dispersion and a preparation method thereof. Background technique [0002] Graphene has carbon atoms with sp 2 It is a two-dimensional structure composed of covalent bonds, and it has special properties such as very high carrier mobility, hardness, thermal conductivity, current carrying capacity, and extremely large surface-to-volume ratio. Therefore, graphene has become a highly valued research target in the fields of biomedicine, electronics, and optoelectronic components in recent years. At the same time, graphene dispersion can be widely used in the field of coatings. It is an important additive in products such as conductive coatings and related co-conductors, lithium-ion electrode co-conductors, anti-corrosion coating additives and graphene temperature eq...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/19C01B32/194B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01B2204/04C01B2204/32C01P2004/51C01P2004/61C01P2004/62C01P2004/64
Inventor 吴定宇张廷宇李欣錞林勃汎
Owner TAIWAN TEXTILE RESEARCH INSTITUTE
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