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High-dispersion graphene heat-conduction water-based paint and preparation method thereof

A water-based coating, graphene technology, applied in the direction of coating, can solve the problems of application limitation, high cost, poor dispersion of graphene and polymer, etc., and achieve the effects of good applicability, controllable process and low cost

Inactive Publication Date: 2018-08-03
NANJING FORESTRY UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Generally, graphene is stripped from graphite, the cost is high, and the dispersion of graphene and polymer is poor. Due to the interaction of van der Waals force between the sheets, it is easy to aggregate during the application process, and it usually needs to be dispersed. In solvents, but because graphene is insoluble in water and non-lipophilic, its application is limited, so the development of graphene dispersions with good dispersion and high stability will help expand the application range of graphene

Method used

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  • High-dispersion graphene heat-conduction water-based paint and preparation method thereof
  • High-dispersion graphene heat-conduction water-based paint and preparation method thereof
  • High-dispersion graphene heat-conduction water-based paint and preparation method thereof

Examples

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Effect test

Embodiment 1

[0041] A highly dispersed graphene water-conductive coating and preparation method thereof, characterized in that it is composed of water-based coating, modifier cellulose nanocrystal / highly dispersed graphene flake suspension, wherein the cellulose nanocrystal / graphene flake suspension : water-based paint = (1-7): 100; flake graphene: cellulose nanocrystal suspension = (0-2.5): 100.

[0042] The modifier nanocellulose is cellulose nanocrystal / graphene flake suspension, the amount of dry matter after the two are blended ranges from 0.054-0.252g, and its preparation method is: treat with sulfuric acid with a concentration of 64% Microcrystalline cellulose Microcrystalline cellulose, proportioning microcrystalline cellulose: H 2 SO 4 =1g: 9.8ml, add a certain amount of flake graphene material to the mixture of microcrystalline cellulose and concentrated sulfuric acid in proportion, the acid hydrolysis temperature is 45°C, and the time is 60min-120min; add deionized water to sto...

Embodiment 2

[0053] A method for preparing a highly dispersed and highly conductive water-based WPU coating. Take 3g of water-based WPU coating, 0.03g of cellulose nanocrystal / graphene mixed solution, and the concentration of cellulose nanocrystal / graphene flake suspension is 0.9%-4.1%, and prepare the original water-based coating WPU coating A, which is the blank sample ; 2.5% cellulose nanocrystals / water-based WPU composite coating B; 2.5% graphene / water-based WPU composite coating C; 1% cellulose nanocrystals / graphene / water-based WPU composite coating D; the specific preparation method is to weigh The weight of the coating and its modifier required under the above experimental conditions, mixed uniformly, ultrasonic 1h, so that the modifier is evenly distributed in the coating. The modified paint is sprayed on the wood surface by spraying at a certain pressure (refer to the standard 98PSI, Japan). The base material is a board polished by 1000 mesh fine sandpaper. Wipe the surface dust b...

Embodiment 3

[0056] A method for preparing a highly dispersed and highly conductive water-based WPU coating. Take 3g of water-based WPU coating and 0.06g of cellulose nanocrystal / graphene mixed solution (the concentration of cellulose nanocrystal / graphene flake suspension is 0.9%-4.1%) to prepare the original water-based coating WPU coating A which is blank Sample; 2.5% cellulose nanocrystals / water-based WPU composite coating B; 2.5% graphene / water-based WPU composite coating C; 2% cellulose nanocrystals / graphene / water-based WPU composite coating E; preparation method is with embodiment 1. After the dried sample was left to stand for 24 hours, the performance test was performed, and the results are as follows:

[0057]

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Abstract

The invention relates to high-dispersion graphene heat-conduction water-based paint. The high-dispersion graphene heat-conduction water-based paint is prepared from water-based paint and modifier cellulose nanocrystal / flaky graphene suspension, wherein a mass ratio of the cellulose nanocrystal / flaky grpahene suspension to the water-based paint is (1 to 7): 100, and a mass ratio of the flaky graphene in the cellulose nano crystal / flaky graphene suspension to cellulose nano crystal suspension is (0 to 2.5): 100. The preparation method comprises the following steps: (1) preparing cellulose nano crystal / flaky graphen suspension; (2) mixing the suspension and the water-based paint; (3) smearing the modified water-based paint; and (4) drying, curing, and forming a film. The high-dispersion graphene heat-conduction water-based paint has the advantages that: (1) hydroxyl on the surface of the cellulose nanocrystal sufficiently reacts with the surface active group of a graphene flake layer, sothat the graphene is highly uniformly dispersed; (2) the synergistic effect of the cellulose nanocrystal and the graphene can apparently improve the heat conductivity, impact resistance, hardness andadhesion of a coating; and (3) the high-dispersion graphene heat-conduction water-based paint is low in cost, wide in source, controllable in process and good in applicability.

Description

technical field [0001] The invention relates to a high-dispersion graphene thermal conductivity coating and a preparation method thereof, belonging to the technical field of thermal conductivity coatings. Background technique [0002] At present, green and environmentally friendly coatings are being promoted in various fields in the world. Therefore, low-pollution water-based coatings have become a new direction for the development of coating technology. Among them, water-based coatings are conducive to rational use of resources, prevention of environmental pollution, and protection of human health. VOC and harmful air pollutants have become a research hotspot. Water-based coatings have become the preferred variety due to their many technical approaches, wide application, safety, and relatively simple construction. However, water-based coatings are not only widely used in the field of architectural coatings, but also in other fields, especially in the field of industrial coa...

Claims

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Application Information

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IPC IPC(8): C09D7/65C09D7/61
CPCC08K3/04C08K7/00C08L1/02C09D7/65C09D7/70
Inventor 吴燕唐沁雯胥莉陈红徐伟吴智慧詹先旭杨勇
Owner NANJING FORESTRY UNIV
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