Carbon material dispersant, preparation method thereof, and stable carbon material aqueous dispersion containing the dispersant
A water-based dispersion and carbon material technology, applied in the direction of nano-carbon, graphene, graphite, etc., can solve the problems of difficult industrial production, low surfactant stripping efficiency, and danger of ionic liquids, and achieve low-cost effects
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[0093]1. An amphiphilic hyperbranched polymer having a skeleton structure containing an amine group and a monocyclic or polycyclic ring covalently bonded to the skeleton structure and non-covalently associated with the graphene structure , Fused ring or heterocyclic aryl.
[0094]2. The amphiphilic hyperbranched polymer according to embodiment 1, wherein the weight average molecular weight of the amphiphilic hyperbranched polymer is 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 group includes substituted or unsubstituted groups derived from the following: benzene, naphthalene, Pyrene, anthracene, pentacene, benzo[a]pyrene, benzophenone, thioxanthone, pyridine, quinine, pyrene, tetra...
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=640g / mol), and N- Ethylethylenediamine (NEED) and N,N'-diethylethylenediamine were dissolved in ethanol, stirred at room temperature for 48h under nitrogen protection, heated to 80°C, and refluxed for 24h. After the reaction was completed, it was cooled to room temperature, and 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 degree of branching of the polymer. The hyperbranched polymers 1-4 obtained above can be further modified by mo...
Embodiment 1
[0124]Example 1: Using 9-anthracene methanol as a non-covalently bonding component with graphene to synthesize a dispersant, and use this componentPreparation of aqueous graphene dispersion from powder
[0125](1) Preparation of hyperbranched polymer skeleton. 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, stirred at room temperature for 48 hours under nitrogen protection, heated to 80°C, and continued to reflux for 24 hours. After the reaction is completed, it is cooled to room temperature, and ethanol is removed by distillation under reduced pressure to obtain a light yellow viscous solid product, namely hyperbranched polymer-1, with a yield of about 90%.
[0126](2) Synthesis of monocyclic, polycyclic, fused ring or heterocyclic compounds containing functional groups. Dissolve 9-anthracene methanol (4.17g, 0.02mol) and epichlorohyd...
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