Carbon material dispersing agent, preparation method thereof and water-borne dispersion body of stable carbon material containing dispersing agent

A dispersant, carbon material technology, applied in nano-carbon, graphite, graphene and other directions, can solve the problems of difficult to realize industrial production, dangerous ionic liquids, high toxicity of organic solvents, etc., and achieve low-cost effects

Active Publication Date: 2018-09-21
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method is simple, convenient, and low in cost, the stripping system has its own defects, such as the toxicity of the organic solvent used, the low stripping efficiency of the surfactant, and the danger of ionic liquids.
Moreover, liquid-phase exfoliation usually requires cumbersome steps such as pretreatment and high-temperature reduction (as disclosed in CN 104692363 B), and the use of ultrasonic methods leads to deterioration of product structural integrity, and it is difficult to realize industrial production

Method used

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  • Carbon material dispersing agent, preparation method thereof and water-borne dispersion body of stable carbon material containing dispersing agent
  • Carbon material dispersing agent, preparation method thereof and water-borne dispersion body of stable carbon material containing dispersing agent
  • Carbon material dispersing agent, preparation method thereof and water-borne dispersion body of stable carbon material containing dispersing agent

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Experimental program
Comparison scheme
Effect test

Embodiment approach

[0093] 1. An amphiphilic hyperbranched polymer, said polymer has a skeleton structure containing an amine group and a monocyclic, polycyclic ring that is covalently bonded to said skeleton structure and non-covalently associated with a graphene structure , fused ring or heterocyclic aryl.

[0094] 2. The amphiphilic hyperbranched polymer according to embodiment 1, wherein the amphiphilic hyperbranched polymer has a weight average molecular weight in the range of 2000-30000 g / mol.

[0095] 3. The amphiphilic hyperbranched polymer according to embodiment 1, wherein the degree of branching of the amphiphilic hyperbranched polymer is in the range of 0.21-0.62.

[0096] 4. The amphiphilic hyperbranched polymer according to embodiment 1, wherein the monocyclic, polycyclic, condensed ring or heterocyclic aryl groups include substituted or unsubstituted groups derived from: benzene, naphthalene, Pyrene, anthracene, pentacene, benzo[a]pyrene, benzophenone, thioxanthone, pyridine, pero...

Synthetic example 1

[0119] Synthesis Example 1: Synthesis of Hyperbranched Polymer

[0120] Polyethylene glycol diglycidyl ether (PEG-DE, Mn=500 g / mol), polypropylene glycol diglycidyl ether (PPG-DE, Mn=640 g / mol), and N- Ethylethylenediamine (NEED) and N,N'-diethylethylenediamine were dissolved in ethanol, under nitrogen protection, stirred at room temperature for 48h, heated to 80°C, and continued to reflux for 24h. After the reaction was completed, it was cooled to room temperature, and the ethanol was removed by distillation under reduced pressure to obtain a light yellow viscous solid product, namely polymer 1-5, with a yield of about 90%.

[0121] Table 1

[0122]

[0123] It can be seen from the results in Table 1 that the ring-opening reaction of polyglycidyl ethers and polyfunctional amines such as trifunctional amines can form hyperbranched polymers, and the presence of difunctional amines can be used to adjust the branching degree of polymers. The hyperbranched polymers 1-4 obta...

Embodiment 1

[0124] Embodiment 1: Synthesize a dispersant with 9-anthracene methanol as a non-covalent bonding component with graphene, and use this component Powder Preparation of Graphene Aqueous Dispersion

[0125] (1) Preparation of hyperbranched polymer backbone. Polyethylene glycol diglycidyl ether (PEG-DE, Mn=500g / mol, 10.52g), polypropylene glycol diglycidyl ether (PPG-DE, Mn=640g / mol, 12.8g), and N-ethyl Ethylenediamine (NEED, 3.52g) was dissolved in ethanol, under the protection of nitrogen, stirred at room temperature for 48h, heated to 80°C, and continued to reflux for 24h. After the reaction was completed, it was cooled to room temperature, and the ethanol was removed by distillation under reduced pressure to obtain a light yellow viscous solid product, Hyperbranched Polymer-1, with a yield of about 90%.

[0126] (2) Synthesis of monocyclic, polycyclic, condensed ring or heterocyclic compounds containing functional groups. Dissolve 9-anthracenemethanol (4.17g, 0.02mol) a...

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Abstract

The invention relates to a carbon material dispersing agent, a preparation method thereof and a water-borne dispersion body of a stable carbon material containing the dispersing agent. Specifically, the dispersing agent is suitable for dispersion of the carbon material with a graphene structure and contains an amphipathic hyperbranched polymer, wherein the polymer is provided with a framework structure containing amidogen and a monocycle or polycycle, condensed ring or heterocyclic amidogen covalently bonded with the framework structure and non-covalently associated with the graphene structure. The preparation method of the carbon material dispersing agent comprises the steps that (i) a glycidyl compound reacts with polyfunctional amine so as to prepare a hyperbranched polymer with secondary amidogen at the tail end, wherein the amino hydrogen of the polyfunctional amine is excessive compared with the glycidyl mole of the glycidyl compound; (ii) the monocycle or polycycle, condensed ring or heterocyclic amidogen non-covalently associated with the graphene structure is introduced into the hyperbranched polymer through reaction with the secondary amidogen, and accordingly the dispersing agent containing the amphipathic hyperbranched polymer is prepared.

Description

technical field [0001] The invention relates to a carbon material dispersant and a preparation method thereof. The present invention also relates to a stable aqueous dispersion of carbon material containing the above-mentioned carbon material dispersant and its use in various fields. The invention additionally relates to an amphiphilic hyperbranched polymer. Background technique [0002] Carbon materials, especially carbon materials with a graphene structure, have extremely high application value due to their unique structure. As a typical representative of this type of carbon material, graphene is a carbon atom with sp 2 The two-dimensional crystal material with regular hexagonal honeycomb lattice structure formed by hybridization is only one or several carbon atoms thick. This ordered ultra-thin two-dimensional structure endows graphene with the following excellent physical and chemical properties: light weight, low density, high chemical stability and high specific sur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C01B32/19C01B32/21
CPCC08G83/005C01B32/19C01B32/21
Inventor 姜学松李瑾苏志龙
Owner SHANGHAI JIAO TONG UNIV
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