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Polypyrrole-graphene/polyurethane antifouling coating, its preparation method and application

An antifouling coating and graphene technology, applied in polyurea/polyurethane coatings, antifouling/underwater coatings, coatings, etc., can solve problems such as poor antifouling, achieve excellent photothermal effect, and improve antifouling The ability to damage adhesion and avoid the effect of uneven release rate

Active Publication Date: 2022-04-05
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]Polyurethane protective coating has good impact resistance and anti-collision performance, but its anti-fouling property is not good

Method used

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  • Polypyrrole-graphene/polyurethane antifouling coating, its preparation method and application
  • Polypyrrole-graphene/polyurethane antifouling coating, its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The present embodiment provides a kind of preparation method of polypyrrole-graphene nanofiller, comprises the steps:

[0036] Disperse 3.42g of ammonium persulfate (APS) and 1.82g of cetyltrimethylammonium bromide (CATB) in a molar ratio of 3:1 in 500ml of hydrochloric acid solution with a concentration of 4.92g / L, and use ultrasonic dispersion to 0.02g of graphene is evenly dispersed in the above liquid, and 4.03g of pyrrole monomer is added dropwise under stirring. The reactant turns from milky white to blue-black and finally black. After 6 hours, the reaction is complete. Filter and rinse the filter cake with distilled water and ethanol , to obtain graphene-polypyrrole nanofillers after vacuum drying.

Embodiment 2

[0038] The present embodiment provides a kind of preparation method of polypyrrole-graphene nanofiller, comprises the steps:

[0039] Disperse 27.36g of ammonium persulfate (APS) and 10.92g of cetyltrimethylammonium bromide (CATB) in a molar ratio of 4:1 in 3L of hydrochloric acid solution with a concentration of 4.92g / L, and use ultrasonic dispersion to 0.48g of graphene is evenly dispersed in the above liquid, and 24.18g of pyrrole monomer is added dropwise under stirring. The reactant turns from milky white to blue-black and finally black. After 6 hours, the reaction is complete. Filter and rinse the filter cake with distilled water and ethanol , to obtain graphene-polypyrrole nanofillers after vacuum drying.

Embodiment 3

[0041]This embodiment provides a method for preparing a group hydrolyzed polyurethane prepolymer, comprising the following steps:

[0042] Add 100g of xylene and 25g of tetrahydrofuran into a four-necked flask equipped with a mechanical stirring device, a nitrogen protection device, a constant pressure dropping funnel, a thermometer and a condenser tube, and put 13.4g of 2,2-dimethylolpropionic acid into the flask , the temperature of the system was raised to 50°C, and 44.46g of isophorone diisocyanate (IPDI) was added dropwise thereto. After mixing evenly, the temperature of the system was raised to 80-85°C, and the system was clarified and kept warm for 0.5h. Cool down to 50°C, add 200g of polytetrahydrofuran ether (molecular weight: 1000) into the system, mix well, and raise the temperature of the system to 80-85°C, and react for 2h. When the viscosity of the system increased significantly and the -NCO content dropped to 0.5%, the system was cooled to 50°C, 100g of xylene a...

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Abstract

The invention discloses a polypyrrole-graphene / polyurethane antifouling paint, a preparation method and application thereof, wherein the polypyrrole-graphene / polyurethane antifouling paint is composed of component A and component B; in parts by weight, A The components are mainly composed of the following raw materials: 500 parts of group-hydrolyzed polyurethane prepolymer, 25-50 parts of bentonite, 25-50 parts of titanium dioxide, 60-120 parts of zinc oxide, 15-30 parts of talc, polypyrrole-graphene 15-30 parts of nanofillers; by weight, component B is mainly composed of the following raw materials: 5-7 parts of leveling agent, 5-7 parts of defoamer, 6-15 parts of chain extender, 10 parts of silane coupling agent ‑25 parts, 1-2 parts of catalyst. The present invention is a two-component polyurethane coating, which has good adhesion, anti-collision and crack resistance, and can also improve antifouling performance and antifouling durability.

Description

technical field [0001] The invention relates to the technical field of antifouling coatings, in particular to a polypyrrole-graphene / polyurethane antifouling coating and a preparation method thereof. Background technique [0002] Ocean buoy is a kind of navigation mark floating on the water surface, which can measure wind, air pressure, temperature, humidity, visibility in the atmosphere, as well as waves, currents, water temperature, salinity and other parameters in hydrological parameters. However, due to its long-term undulations and the influence of light, marine organisms will rapidly multiply and fix on its surface, which will affect the balance and stability of the buoy. If it is a metal structure, it will suffer from accelerated corrosion, affecting its function and service life. At the same time, for buoys, the anti-fouling coating not only needs to achieve anti-fouling effect, but also needs to further meet the requirements of anti-collision and good weather resist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/08C09D5/16C09D7/61C09D7/65
CPCC09D175/08C09D5/1662C09D5/1687C08K2003/2241C08K2003/2296C08K2201/011C08L79/04C08K3/042C08K3/346C08K3/22C08K3/34C09D5/1618C09D175/04C08G18/246C09D7/61C08G18/792C08G18/10C08G18/348C08G18/4854C08G18/73C09D7/62C08K3/013C08K9/08C08G18/289C08G18/3225
Inventor 王君唐嘉玮陈蓉蓉朱佳慧刘培礼于静孙高辉刘婧媛刘琦
Owner HARBIN ENG UNIV
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