Self-crosslinking graphene dispersing agent, preparation method and nano carbon material dispersion liquid

A graphene dispersant and nano-carbon material technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve problems such as low dispersion concentration, unsatisfactory production and life, and large amount of dispersant, so as to avoid experimental steps , the effect of excellent catalytic performance

Active Publication Date: 2022-01-04
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional dispersants have limited ability to disperse nano-carbon materials in water. Generally, there are problems such as large amount of dispersants and low dispersion concentration. Excessive dispersant molecules will adversely affect the subsequent application of carbon materials.
Most of the new dispersants reported in the literature generally have good dispersion properties for nano-carbon materials, but there are also problems such as complex synthesis, high cost, and lack of functionality, which cannot meet the needs of actual production and life.

Method used

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  • Self-crosslinking graphene dispersing agent, preparation method and nano carbon material dispersion liquid
  • Self-crosslinking graphene dispersing agent, preparation method and nano carbon material dispersion liquid
  • Self-crosslinking graphene dispersing agent, preparation method and nano carbon material dispersion liquid

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Experimental program
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Effect test

Embodiment 1

[0043] The invention discloses a graphene dispersant, its structure is:

[0044]

[0045] The preparation method of above-mentioned graphene dispersant, concrete steps are as follows:

[0046] 1) Add 1g of adenine and 3.5g of 3-glycidyloxypropyltrimethoxysilane to 50ml of anhydrous methanol reagent, put them in a flask, stir and react at 65°C for 36h, and take out the product after the reaction , cooled to room temperature, and then the cooled solution was transferred to a rotary evaporator, and methanol was removed by rotary evaporation at 40° C. in a vacuum state, thereby obtaining a dispersant precursor.

[0047] 2) Take 2g of the dispersant precursor, add it to 40ml of 0.1mol / L formic acid aqueous solution, ultrasonicate the mixed solution for 5 minutes in a water bath to make it evenly mixed, then transfer it to a flask, stir and react at 25°C for 72h, Thus a DSiA solution is obtained. The DSiA solution obtained by the reaction was configured to 10 mg / mL with deionized...

Embodiment 2

[0051] A kind of preparation method of graphene dispersion liquid has used dispersant described in embodiment 1, and concrete preparation method is as follows:

[0052] Take 5mg of graphene powder, add 1mL, 0.5mL, 0.25mL, 0.17mL, 0.13mL of 10mg / mL DSiA solution respectively, use deionized water to prepare a 0.5mg / mL graphene dispersion, and ultrasonicate it in a water bath Preliminary dispersion was carried out for 5 minutes, and further ultrasonic dispersion was carried out for 30 minutes with an ultrasonic cell pulverizer to obtain the corresponding graphene dispersion. The ultrasound power was 350W during ultrasound, and the ultrasound was stopped for 3 seconds every 3 seconds for 30 minutes.

[0053] A series of 0.5mg / mL GR dispersions were configured with a mass ratio of DSiA:GR of 2:1, 1:1, 1:2, 1:3 and 1:4, and were dispersed by an ultrasonic cell pulverizer to obtain the table A very homogeneous dispersion. Under the condition that the ratio of DSiA:GR is 1:1, the GR...

Embodiment 3

[0055] A kind of preparation method of carbon nanotube dispersion liquid, has used dispersant described in embodiment 1, and concrete preparation method is as follows:

[0056] Take 5mg of multi-walled carbon nanotube powder and add them to 0, 0.5mL, 0.25mL, 0.17mL, 0.13mL, 0.1mL of DSiA solution, and then add deionized water to 10mL to configure a 0.5mg / mL dispersion solution, the prepared dispersion liquid was ultrasonicated in a water bath for 5 minutes, and then ultrasonically dispersed for 30 minutes using an ultrasonic cell pulverizer to obtain the corresponding multi-walled carbon nanotube dispersion. The ultrasonic power is 350W, and the ultrasound is stopped for 3 seconds every 3 seconds, and the time is 30 minutes.

[0057] The DSiA:CNT ratios were 0:1, 1:1, 1:2, 1:3, 1:4, and 1:5 respectively, and the CNT dispersion liquid with a CNT concentration of 0.5mol / L was prepared. When the DSiA:CNT ratio of the newly prepared dispersion is 1:5, the dispersion is still unif...

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Abstract

The invention relates to the technical field of dispersing agents, and discloses preparation methods of a self-crosslinking graphene dispersing agent and a nano carbon material dispersion liquid. According to the technical scheme, the preparation methods comprise the following steps of: (1) putting a certain amount of adenine into methanol, ultrasonically stirring, adding 3-glycidyl ether oxypropyl trimethoxy silane, stirring well, reacting at 60 DEG C for 36 hours, and removing methanol after the reaction; (2) adding the reaction product into an HCOOH solution with a certain concentration, and stirring for 72 hours to obtain a dispersing agent DSiA solution; and (3) taking a certain mass of nano carbon material, adding the DSiA solution, preparing solutions with different concentrations by using deionized water, carrying out water bath ultrasonic treatment for 5 minutes, carrying out primary dispersion, and further carrying out ultrasonic dispersion for 30 minutes by using an ultrasonic cell crusher to obtain a corresponding nano carbon material dispersion liquid.

Description

technical field [0001] The invention relates to the field of dispersants and stabilizers, in particular to a self-crosslinking graphene dispersant, a preparation method and a nano-carbon material dispersion. Background technique [0002] Nano-carbon materials, including graphene (GR), carbon nanotubes (CNT), reduced graphene oxide (RGO), etc., have excellent radiation resistance, chemical resistance, high thermal conductivity, high electrical conductivity, and high specific surface area. It has very broad application prospects in energy storage, sensors, optoelectronics and other fields. [0003] Due to the strong π-π conjugation between nanocarbon materials, they are very prone to aggregation, which makes their dispersion in water and organic solvents poor, which limits the practical use of nanocarbon materials to a large extent. Applications in production and life. Therefore, it is very important to solve the dispersion problem of carbon nanomaterials. [0004] There ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F7/10C01B32/194C01B32/174
CPCC07F7/0836C01B32/194C01B32/174Y02E60/10
Inventor 崔俊硕郭梁余孙倩娄振宁单炜军于海彪王月娇冯小庚熊英
Owner LIAONING UNIVERSITY
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