Graphene dispersing agent, preparation method thereof and preparation method of graphene

A graphene dispersant and graphene technology, applied in chemical instruments and methods, dyeing low-molecular organic compound treatment, fibrous fillers, etc., can solve the problems of poor dispersion performance and limited dispersed graphene, and achieve excellent graphene Effects of dispersibility, low production cost, and low defect content

Active Publication Date: 2014-03-12
CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ability of these graphene dispersants to disperse graphene in aqueous solution is very limited. After ultrasonic stripping, the concentration of graphene in the obtained solution is less than 0.5mg / mL, and the dispersion performance is not good.

Method used

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  • Graphene dispersing agent, preparation method thereof and preparation method of graphene
  • Graphene dispersing agent, preparation method thereof and preparation method of graphene
  • Graphene dispersing agent, preparation method thereof and preparation method of graphene

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preparation example Construction

[0037] The invention discloses a preparation method of a graphene dispersant, comprising the following steps:

[0038] Amino organic acid or amino organic acid salt reacts with 1,4,5,8-naphthalene tetracarboxylic dianhydride in an organic solvent to obtain a graphite dispersant as shown in formula (I), formula (II) or formula (III) ;

[0039] The amino organic acid is a compound represented by formula (VII), formula (VIII) or formula (IX);

[0040] The amino acid salt is a compound represented by formula (IV), formula (V) or formula (VI);

[0041]

[0042]

[0043] Among them, n is -CH 2 - the repeating number of the group, n is selected from the integers of 1-20; preferably, n is selected from the integers of 2-18, more preferably, n is selected from the integers of 3-15.

[0044] m + independently selected from H + , alkali metal cation, NH 4 + and any one of the quaternary ammonium salt ions, preferably M + Independently selected from Li + , Na + ,K + and (...

Embodiment 1

[0066] Sodium hydroxide (40.0g, 1.0mmol) was added to an aqueous solution of 3-aminopropionic acid (10mol / L, 100mL), stirred for ten minutes, and the water was distilled off under reduced pressure. The obtained solid was washed once with acetone, and dried in vacuo. 111 g of sodium 3-aminopropionate was obtained. Yield 100%. The reaction equation is as follows:

[0067]

Embodiment 2

[0069] Add 2.68g1,4,5,8-naphthalene tetracarboxylic dianhydride (10mmol), 3.33g sodium 3-aminopropionate (30mmol) prepared in Example 1 and 50mL N,N-dimethylformamide in the flask , reacted at 100° C. for 10 hours under a nitrogen atmosphere. After cooling, the reaction solution was poured into ether, filtered, and the obtained solid was washed three times with ether to obtain 3,3'-(1,4,5,8-naphthalene tetracarboxylic acid diimide-N,N'-) - Sodium dipropionate 4.36 g. Yield 96%. 1 H NMR (400MHz,D 2 O): δ (ppm) 8.43 (s, 4H), 4.28 (t, 4H), 2.54 (t, 4H). see figure 1 , figure 1 The H NMR spectrum of 3,3'-(1,4,5,8-naphthalene tetracarboxylic acid diimide-N,N'-)-sodium dipropionate prepared in Example 2.

[0070] The reaction equation is as follows:

[0071]

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Abstract

The invention provides a graphene dispersing agent as shown in a formula (I), a formula (II) or a formula (III) in the Specification. The graphene dispersing agent consists of a naphthalene tetracarboxylic acid bisimide unit, an anion group and an alkyl chain. Firstly, the naphthalene tetracarboxylic acid bisimide unit and graphene have strong attraction to each other, so that the whole molecules can be combined with the graphene; secondly, the anion group has excellent water solubility, so that the combined object of the molecules and the graphene can be fully dispersed in water; moreover, the alkyl chain can be used for separating the naphthalene tetracarboxylic acid bisimide unit from the anion group, so that the naphthalene tetracarboxylic acid bisimide unit and the anion group can act independently. Therefore, through the combination of the naphthalene tetracarboxylic acid bisimide unit, the anion group and the alkyl chain, the graphene dispersing agent provided by the invention has excellent graphene dispersing capability; the graphene prepared by using the graphene dispersing agent and adopting an ultrasonic method is not subjected to the oxidation-reduction process, so that the flaw content is low, and the preparation cost is low.

Description

technical field [0001] The invention relates to the field of dispersants, in particular to a graphene dispersant, a preparation method thereof and a graphene preparation method. Background technique [0002] Graphene is made of sp 2 Hybridized carbon atoms are interconnected to form a carbon material with a two-dimensional honeycomb lattice structure with a thickness of one atomic layer. Graphene has excellent electrical, mechanical, thermal and mechanical properties, and is expected to be widely used in transparent conductive films, composite materials, energy, sensors, biotechnology, catalytic materials and other fields. [0003] Existing graphene preparation methods include mechanical exfoliation, epitaxial growth, chemical vapor deposition, oxidation-reduction, solution ultrasonic exfoliation, etc. Among them, the methods of mechanical exfoliation, epitaxial growth, and chemical vapor deposition can obtain graphene with low defect content, but these three methods can o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F17/32C07D471/06C09C1/46C09C3/08C09K23/32
Inventor 刘俊张璐王利祥
Owner CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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