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A kind of preparation method of graphene/nano microcrystalline cellulose aqueous phase dispersion liquid

A nanocrystalline and cellulose technology, applied in chemical instruments and methods, non-metallic elements, carbon compounds, etc., to achieve remarkable results, easy operation, and simple production process

Active Publication Date: 2019-11-22
浙江恒祥棉纺织造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there is no report on the preparation of highly stable graphene / nanocrystalline cellulose aqueous dispersion based on the joint mechanism of electrostatic interaction, steric hindrance effect and ultrasonic interaction.

Method used

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  • A kind of preparation method of graphene/nano microcrystalline cellulose aqueous phase dispersion liquid
  • A kind of preparation method of graphene/nano microcrystalline cellulose aqueous phase dispersion liquid
  • A kind of preparation method of graphene/nano microcrystalline cellulose aqueous phase dispersion liquid

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Experimental program
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Effect test

Embodiment 1

[0030] First, nanocrystalline cellulose was dissolved in water, the pH of the system was adjusted to 6.5, the solid content was 0.2%, and the dispersion was continued for 20 minutes to obtain dispersion system A. Secondly, a certain amount of graphene was dispersed in water to make a dispersion system with a solid content of 0.5%, the pH of the system was adjusted to 7.5, and the dispersion was continued for 20 minutes to obtain dispersion system B. Subsequently, the dispersion system A was dispersed in the dispersion system B, the added amount of nano-microcrystalline cellulose was adjusted to be 0% of the added amount of graphene, and the pH of the system was adjusted to 7.0 to obtain an A / B aqueous phase composite dispersion. Finally, the obtained A / B aqueous phase composite dispersion was placed in an ultrasonic cell pulverizer for ultrasonic treatment at a power of 720W for 5-8 minutes, and the ultrasonic environment of the sample was a warm water bath. After the above co...

Embodiment 2

[0032] First, nanocrystalline cellulose was dissolved in water, the pH of the system was adjusted to 6.5, the solid content was 0.2%, and the dispersion was continued for 20 minutes to obtain dispersion system A. Secondly, a certain amount of graphene was dispersed in water to make a dispersion system with a solid content of 0.5%, the pH of the system was adjusted to 7.5, and the dispersion was continued for 20 minutes to obtain dispersion system B. Subsequently, the dispersion system A was dispersed in the dispersion system B, the addition of nano-microcrystalline cellulose was adjusted to be 1% of the addition of graphene, and the pH of the system was adjusted to 7.0 to obtain an A / B aqueous phase composite dispersion. Finally, the obtained A / B aqueous phase composite dispersion was placed in an ultrasonic cell pulverizer for ultrasonic treatment at a power of 720W for 5-8 minutes, and the ultrasonic environment of the sample was a warm water bath. After the above combined s...

Embodiment 3

[0034] First, nanocrystalline cellulose was dissolved in water, the pH of the system was adjusted to 6.5, the solid content was 0.2%, and the dispersion was continued for 20 minutes to obtain dispersion system A. Secondly, a certain amount of graphene was dispersed in water to make a dispersion system with a solid content of 0.5%, the pH of the system was adjusted to 7.5, and the dispersion was continued for 20 minutes to obtain dispersion system B. Subsequently, the dispersion system A was dispersed in the dispersion system B, the added amount of nano-microcrystalline cellulose was adjusted to be 2% of the added amount of graphene, and the pH of the system was adjusted to 7.0 to obtain an A / B aqueous phase composite dispersion. Finally, the obtained A / B aqueous phase composite dispersion was placed in an ultrasonic cell pulverizer for ultrasonic treatment at a power of 720W for 5-8 minutes, and the ultrasonic environment of the sample was a warm water bath. After the above co...

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Abstract

The invention discloses a preparation method of a graphene / nanocrystalline cellulose water-phase dispersion solution. The preparation method comprises the following steps: firstly, dispersing nanocrystalline cellulose in water to prepare a dispersion system A with certain solid content; meanwhile, dispersing graphene into water to prepare a dispersion system B with certain solid content; then dispersing the dispersion system A into the dispersion system B; regulating and controlling the adding ratio of the nanocrystalline cellulose to the graphene; adjusting the pH (Potential of Hydrogen) of the system to certain value to obtain an A / B water-phase composite dispersion solution; finally; putting the obtained A / B water-phase composite dispersion solution into an ultrasonic cell crusher and carrying out ultrasonic treatment for certain time under certain power, so as to prepare the high-stability graphene / nanocrystalline cellulose water-phase dispersion solution. According to the preparation method disclosed by the invention, the high-stability graphene / nanocrystalline cellulose water-phase dispersion solution is prepared based on a combined mechanism of electrostatic interaction, a stereo-hindrance effect and an ultrasonic effect; the preparation method realizes a synergistic effect and simple technology superposition is avoided.

Description

technical field [0001] The invention belongs to the field of graphene composite materials, and in particular relates to a preparation method of highly stable and dispersed graphene aqueous phase dispersion liquid. Background technique [0002] Graphene has a unique two-dimensional honeycomb lattice structure and is the thinnest two-dimensional crystal material found so far, with a thickness of only 0.335 nm. Graphene has excellent electrical, mechanical, optical and mechanical properties. The unique and excellent performance of graphene makes it widely used in solar cells, supercapacitors, biological detection, displays, fuel cells, etc. [0003] Improving the dispersion of graphene particles can greatly facilitate the formation of efficient networks for strain, electrical conductivity, and heat transfer in composites, thus giving graphene its extraordinary potential in the production of functional materials. However, due to the strong van der Waals force between graphene p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/194
Inventor 唐艳军赵若男张馨琪
Owner 浙江恒祥棉纺织造有限公司