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A kind of fluorine-containing graphene oxide modified polyurethane coating and its preparation method and application

A technology of graphene modification and polyurethane coatings, which is applied in polyurea/polyurethane coatings, antifouling/underwater coatings, coatings, etc., can solve the problems of reduced electrical conductivity of materials, achieve improved mechanical properties, simple preparation process, The effect of improving hydrophobicity

Active Publication Date: 2019-08-27
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In recent years, people have tried different methods to synthesize graphene / polyurethane composite materials, but there are still some shortcomings, such as the introduction of graphene oxide will cause the material's conductivity to be greatly reduced compared with graphene, etc.

Method used

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  • A kind of fluorine-containing graphene oxide modified polyurethane coating and its preparation method and application
  • A kind of fluorine-containing graphene oxide modified polyurethane coating and its preparation method and application
  • A kind of fluorine-containing graphene oxide modified polyurethane coating and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Preparation of fluorine-containing graphene oxide:

[0031] Put the graphite powder into the flask, and add H with a mass concentration of 98% 2 SO 4 and H at a mass concentration of 85% 3 PO 4 ; Under ice bath conditions, slowly add KMnO 4 , keep the mixed solution at 40-50°C and stir the reaction; after the mixed solution obtained from the reaction is cooled to room temperature, it is poured on ice cubes made of deionized water, and H2O with a mass concentration of 30% is added under stirring 2 o 2 , at this time, the mixed solution turns from purple-black to bright yellow; after the mixed solution is filtered, it is centrifuged and washed 5 times with 10% HCl to remove the residue; it is washed and centrifuged for 5 times, then freeze-dried and dispersed by ultrasonic to obtain Brown graphene oxide GO; 0.1g prepared graphene oxide (GO) and 0.1g dicyclohexylcarbodiimide (DCC) were ultrasonically dispersed in a round bottom flask with 100ml ethanol, and then 0....

Embodiment 2

[0036] Preparation of fluorine-containing graphene oxide:

[0037] Put the graphite powder into the flask, and add H with a mass concentration of 98% 2 SO 4 and H at a mass concentration of 85% 3 PO 4 ; Under ice bath conditions, slowly add KMnO 4 , keep the mixed solution at 40-50°C and stir the reaction; after the mixed solution obtained from the reaction is cooled to room temperature, it is poured on ice cubes made of deionized water, and 30% H 2 o 2, at this time, the mixed solution turns from purple-black to bright yellow; after the mixed solution is filtered, it is centrifuged and washed 5 times with HCl with a mass concentration of 10% to remove the residue; it is washed and centrifuged 5 times, then freeze-dried, dispersed and ultrasonicated to obtain Brown graphene oxide GO; 0.1 g of prepared graphene oxide (GO) and dicyclohexylcarbodiimide (DCC) were ultrasonically dispersed in a round-bottomed flask filled with ethanol. Then 0.4 g of trifluoroethanol was added...

Embodiment 3

[0041] 1) Preparation of fluorine-containing graphene oxide:

[0042] Put the graphite powder into the flask, and add H with a mass concentration of 98% 2 SO 4 and H at a mass concentration of 85% 3 PO 4 ; Under ice bath conditions, slowly add KMnO 4 , keep the mixed solution at 40-50°C and stir the reaction; after the mixed solution obtained from the reaction is cooled to room temperature, it is poured on ice cubes made of deionized water, and H2O with a mass concentration of 30% is added under stirring 2 o 2 , at this time, the mixed solution turns from purple-black to bright yellow; after the mixed solution is filtered, it is centrifuged and washed 5 times with HCl with a mass concentration of 10% to remove the residue; it is washed and centrifuged 5 times, then freeze-dried, dispersed and ultrasonicated to obtain Brown graphene oxide GO; 0.2 g of prepared graphene oxide (GO) and 0.2 g of dicyclohexylcarbodiimide (DCC) were ultrasonically dispersed in a round-bottomed ...

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Abstract

The invention discloses a fluorine-containing oxidized graphene modified polyurethane coating, a preparation method thereof and an application of the coating. The polyurethane coating comprises fluorine-containing oxidized graphene components. The specific preparation method includes the steps: taking fluorine-containing monomer modified oxidized graphene as a modifier of the polyurethane coating;mechanically blending the fluorine-containing oxidized graphene with polyurethane resin according to a certain proportion to obtain the fluorine-containing oxidized graphene modified polyurethane coating. The polyurethane coating is simple in preparation process and excellent in hydrophobic nature. The polyurethane coating is applied to automobile finish, the hydrophobic nature, the aging resistance and the mechanical property of the automobile finish can be effectively improved, and the polyurethane coating has a great market prospect in automobile paint market and even the field of coatings.

Description

technical field [0001] The invention belongs to the technical field of polymer synthesis, and relates to a fluorine-containing graphene oxide modified polyurethane coating and a preparation method and application thereof. Background technique [0002] Polyurethane coating is a coating technology that began to emerge in the 1960s. It has excellent wear resistance and strong adhesion; excellent chemical resistance and oil resistance, and the urethane bond does not react with acids, alkalis, and oils; High reactivity (low temperature curing properties); high decorative and protective properties. The growth rate of polyurethane coatings in the United States is twice that of the coatings industry, and it is one of the fastest growing varieties in the development of the coatings industry. In the developed countries of the automobile industry, the amount of polyurethane automotive coatings occupies a very important position in the production of coatings, representing the developme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D5/16
Inventor 戴李宗朱继红许一婷王世成罗伟昂李敏
Owner XIAMEN UNIV
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