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Tripolyphosphate/carbon nitride nano composite material, preparation method thereof and application of the same in water-based anticorrosive paint

A technology of nano-composite materials and tripolyphosphate, which is applied in the field of coatings, can solve the problems of poor compatibility, affecting the protective performance of coatings, and easy agglomeration, etc., and achieve the effect of enhancing performance, improving physical barrier performance, and simple process

Pending Publication Date: 2021-12-03
沈阳先进涂层材料产业技术研究院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor compatibility between carbon nitride and organic polymers, g-C 3 N 4 When nanosheets are added to water-based anti-corrosion coatings, they are prone to agglomeration, which will affect the protective performance of the coating

Method used

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  • Tripolyphosphate/carbon nitride nano composite material, preparation method thereof and application of the same in water-based anticorrosive paint

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preparation example Construction

[0034] A preparation method of tripolyphosphate / carbon nitride nanocomposite material, comprising the steps of:

[0035] Step 1, use melamine as raw material to prepare bulk graphite phase carbon nitride (g-C 3 N 4 ), and obtained g-C by stripping 3 N 4Nanosheets.

[0036] Step 2, g-C 3 N 4 Functionalization of nanosheets: take g-C in step 1 3 N 4 The nanosheets were ultrasonically dispersed in an ethanol solution with a mass fraction of 75%-90% at room temperature, then transferred to a water bath at 50-90 °C, and then the silane coupling agent was added dropwise, and kept stirring for 6-12 h; the reaction was completed Afterwards, cooling, centrifugation, washing with absolute ethanol and deionized water, and drying in sequence to obtain functionalized g-C 3 N 4 Nanosheets.

[0037] Step 3, g-C 3 N 4 Carboxylation of nanosheets: take the functionalized g-C in step 2 3 N 4 Ultrasonic dispersion of nanosheets in toluene, then drop an appropriate amount of succini...

Embodiment 1

[0054] (1) Weigh 20 g of melamine into a closed container, place it in a tube furnace, raise the temperature to 500 °C at a rate of 10 °C / min, keep it warm for 5 hours, and cool it down to room temperature naturally to obtain the bulk g-C 3 N 4 ; Then, the above bulk phase g-C 3 N 4 Spread it on the bottom of an alumina crucible, raise the temperature to 550 °C at a rate of 15 °C / min in a nitrogen atmosphere, keep it warm for 2 hours, and then cool it down to room temperature naturally to obtain thermal peeling g-C 3 N 4 Nanosheets.

[0055] (2) g-C 3 N 4 Nanosheet functionalization: take 1.0 g of g-C in step (1) 3 N 4 The nanosheets were ultrasonically dispersed in 85% ethanol solution at room temperature, and then transferred to a water bath at 70 °C; 20 g of KH-550 was added to the above suspension at a speed of 400 r / min, and the reaction was incubated and stirred for 10 h; After the reaction was completed, cooling, centrifugation, washing with absolute ethanol and...

Embodiment 2

[0060] (1) Weigh 20 g of melamine into a closed container, place it in a tube furnace, raise the temperature to 500 °C at a rate of 10 °C / min, keep it warm for 5 hours, and cool it down to room temperature naturally to obtain the bulk g-C 3 N 4 ; Then, the above bulk phase g-C 3 N 4 Spread it on the bottom of an alumina crucible, raise the temperature to 550 °C at a rate of 15 °C / min in a nitrogen atmosphere, keep it warm for 2 hours, and then cool it down to room temperature naturally to obtain thermal peeling g-C 3 N 4 Nanosheets.

[0061] (2) g-C 3 N 4 Nanosheet functionalization: Take 2.0 g of g-C from step (1) 3 N 4 The nanosheets were ultrasonically dispersed in 85% ethanol solution at room temperature, and then transferred to a water bath at 70 °C; 50 g of KH-560 was added to the above suspension at a speed of 400 r / min, and the reaction was incubated and stirred for 10 h; After the reaction was completed, cooling, centrifugation, washing with absolute ethanol a...

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Abstract

The invention belongs to the technical field of coatings, and particularly relates to a tripolyphosphate / carbon nitride nano composite material, a preparation method thereof and application of the same in water-based anticorrosive coatings. The tripolyphosphate / carbon nitride nano composite material is prepared by reacting a carboxylated g-C3N4 nanosheet prepared by taking melamine as a raw material with aminated tripolyphosphate. The tripolyphosphate and the silane coupling agent are introduced to the surface and can be uniformly dispersed in the water-based resin, so that the problem that the performance of the coating is reduced due to agglomeration of the nano filler is solved; meanwhile, the bridging effect of the silane coupling agent can further improve the compatibility between the composite material and the water-based resin, and a filler-resin interface chemical bonding coating is obtained. The graphite-like phase carbon nitride has a two-dimensional layered structure, so that the physical barrier property of the coating can be effectively improved; in addition, tripolyphosphate can release P3O10<5-> to promote formation of a passive film on the surface of carbon steel, so that the corrosion inhibition effect is achieved, and the performance of the water-based anticorrosive paint is further enhanced.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a tripolyphosphate / carbon nitride nanocomposite material, a preparation method thereof and an application in water-based anticorrosion coatings. Background technique [0002] Corrosion of metal materials will not only cause huge economic losses, but also cause equipment damage, engineering hidden dangers and other safety accidents that seriously endanger people's lives. Organic coatings are widely used in the field of metal corrosion protection due to their simple process and economy. With the enhancement of people's environmental awareness, water-based anti-corrosion coatings with green and low toxicity are gradually replacing traditional solvent-based anti-corrosion coatings. Industrial research hotspots. However, water-based anti-corrosion coatings need further modification due to problems such as high surface tension, poor interlayer adhesion, and insufficient s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D7/62C09D5/08C09D163/00
CPCC09D7/62C09D5/08C09D163/00C08K2003/321C08K9/06C08K9/04C08K3/28C08K3/32
Inventor 葛晶沈斌史胜南郭万元刘国惠杨华许仙鹤姚红蕊
Owner 沈阳先进涂层材料产业技术研究院有限公司
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