Modified fiber reinforced anticorrosive paint, and preparation method and application thereof

A technology for modifying fibers and anti-corrosion coatings, applied in the field of coatings, can solve the problems that the excellent anti-corrosion properties of anti-corrosion coatings cannot be well exerted, the dispersibility of functional filler media is not good, and the impact resistance of coatings is affected. Suitable for mass production and application, the effect of alleviating fatigue cracking and peeling, avoiding fatigue damage

Active Publication Date: 2018-07-20
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Application Information

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Problems solved by technology

[0003] The existing anti-corrosion coatings become hard and brittle due to the curing of the matrix resin, which makes the coating elastic and tough, thus affecting the impact resistance of the coating
In order to improve the toughness of the coating without affecting the corrosion resistance of the coating, in addition to improving the flexibility of the matrix resin itself, adding functional fillers is also one of the quick and effective methods, but the dispersion of commonly used functional filler media Usually not good, resulting in the addition of functional filler medium, a large number of process defects in the coating system during coating, so that the superior anti-corrosion performance of anti-corrosion coatings cannot be well exerted

Method used

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  • Modified fiber reinforced anticorrosive paint, and preparation method and application thereof

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preparation example Construction

[0021] In some more specific embodiments, the preparation method of the dopamine modified fiber comprises:

[0022] (1) Soak a commercially available polymer fiber in a mixed solution of acetone and tetrahydrofuran with a volume ratio of 1:1-1:3, ultrasonicate for more than half an hour, and dry in an oven at 30-50°C.

[0023] (2) Weigh dopamine and polyethyleneimine with a mass ratio of 3:1-1:1 and dissolve them in Tris buffer solution to form a mixed solution, and then immerse the polymer fiber treated in step (1) in the mixed solution , Stir at room temperature for 2-10h, filter, and dry at room temperature.

[0024] Another aspect of the embodiments of the present invention provides a modified fiber-reinforced anti-corrosion coating, which includes: 30-60 parts by weight of matrix resin, 0.1-0.2 parts by weight of graphene powder, 3-9 parts by weight of polyaniline powder, talc 5-9 parts by weight of powder, 1-2 parts by weight of sodium sulfite, 20-50 parts by weight of ...

Embodiment 1

[0045] (1) Mix acetone and tetrahydrofuran at a volume ratio of 1:1, stir evenly, weigh 2 g of aramid fibers into the mixed solution, ultrasonicate for half an hour, filter, and dry in an oven at 30°C.

[0046] (2) Weigh 3g of dopamine and 1g of polyethyleneimine respectively, dissolve them in 50mL of Tris buffer solution, soak the fibers treated in step (1) in the mixed solution, stir at room temperature for 2h, filter, and Dry to obtain modified fibers.

[0047] (3) Add 1gKH560 and 2mL mixed solvent (composed of xylene and ethyl acetate with a volume ratio of 3:1) into the reaction kettle, and then add 2g of modified fiber, 0.1g of graphene powder, and 5g of talc powder in sequence , sodium thiosulfate 2g, wollastonite powder 2g, stir and moisten evenly, obtain a uniformly dispersed feed liquid, and set aside.

[0048] (4) Weigh 30g of fluorocarbon resin and add it to the reaction kettle, then add the feed liquid obtained in step (3), stir for 0.5h, add 20g of titanium diox...

Embodiment 2

[0051] (1) Mix acetone and tetrahydrofuran at a volume ratio of 1:2, stir evenly, weigh 2 g of acrylic fibers into the mixed solution, ultrasonicate for half an hour, filter, and dry in an oven at 40°C.

[0052] (2) Weigh 2g of dopamine and 1g of polyethyleneimine respectively, dissolve them in 50mL of Tris buffer solution, immerse the fiber treated in step (1) in the mixed solution, stir at room temperature for 4h, filter, and Dry to obtain modified fibers.

[0053] (3) Add 1gKH560 and 3mL mixed solvent (composed of xylene and ethyl acetate with a volume ratio of 3:2) into the reaction kettle, and then add 2g of modified fiber, 0.15g of graphene powder, and 6g of talc powder in sequence , sodium thiosulfate 2g, wollastonite powder 3g, stir and moisten evenly, obtain a uniformly dispersed feed liquid, and set aside.

[0054] (4) Weigh 40g of fluorocarbon resin and add it to the reaction kettle, then add the material liquid obtained in step (3), stir for 1h, add 30g of titaniu...

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Abstract

The invention discloses a modified fiber reinforced anticorrosive paint, and a preparation method and application thereof. The modified fiber reinforced anticorrosive paint comprises matrix resin, graphene powder, talcum powder, sodium thiosulfate, titanium white powder, dopamine modified fibers, a coupling agent, wollastonite powder, a solvent and the like. The anticorrosive paint of the invention uses dopamine-modified polymer staple fibers as a functional filling material, so the bonding force between the polymer staple fibers and the resin can be enhanced through modification of dopamine,and the impact resistance of a coating formed by the anticorrosive paint can also be effectively improved by utilizing the toughness of the polymer; and thus, when used in the spray-splashing zones ofmarine facilities, the coating is effectively reduced in fatigue cracking and peeling caused by the impact of spray, and in particular, the coating can effectively absorb and transform impact force to protect the coating from fatigue damage caused by the impact force during impacting and beating of the spray. The preparation method for the anticorrosive coating of the invention is simple in process, easily controllable in conditions and suitable for large-scale production, and has good application prospects.

Description

technical field [0001] The invention relates to a modified fiber-reinforced anti-corrosion coating, in particular to an anti-corrosion coating using dopamine modified fiber as a filler, its preparation method and application in the spray splash area of ​​marine engineering facilities, belonging to the technical field of coatings. Background technique [0002] The economic loss caused by corrosion worldwide is about 700 billion US dollars every year. In my country, the loss caused by marine corrosion accounts for more than 30%, and the corrosion in the splash zone is difficult to overcome because of its harsh corrosion environment. In the prior art, there are few researches and developments on protective coatings in the splash zone, and they are limited to a single method of increasing the mechanical strength of the material, increasing the thickness of the anti-corrosion layer, and sacrificing one material to solve the corrosion problem. Splash zone corrosion is a complex c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D127/12C09D175/04C09D183/04C09D5/08C09D7/61C09D7/65C09D7/62C08J5/06
CPCC08J5/06C08J2327/12C08J2375/04C08J2383/04C08J2423/06C08J2433/20C08J2477/10C08J2479/08C08L2205/16C08L2207/068C09D5/08C09D127/12C09D175/04C09D183/04C08L77/10C08K3/00C08K3/04C08K2003/2241C08K3/34C08L33/20C08L79/08C08L23/06
Inventor 张昕王立平蒲吉斌赵海超曾志翔陈佳覃松绿
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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