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Preparation method of sol solution containing two-dimensional nano container supported corrosion inhibitor

A technology of nano-containers and corrosion inhibitors, applied in chemical instruments and methods, zinc compounds, inorganic chemistry, etc., can solve problems affecting the stability of composite sol solutions, reduce the amount of corrosion inhibitors added, and promote the corrosion of metal substrates, etc., to achieve Inhibit agglomeration, increase the concentration, and enhance the dispersion effect

Inactive Publication Date: 2019-03-01
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, GO / LDHs, as inorganic two-dimensional nanomaterials, has interfacial compatibility problems in sol-gel coatings, which not only affects the stability of the composite sol solution, but also easily acts as a diffusion channel for corrosive media in the coating. , promotes the corrosion of the metal substrate, and cannot provide sufficient protection for the substrate; at the same time, the sol-gel coating is thin (about 1-5 μm), and the poor compatibility also limits the GO / LDHs two-dimensional nanocontainer in the sol solution. The amount added further reduces the amount of corrosion inhibitor added, which limits its active protection performance

Method used

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  • Preparation method of sol solution containing two-dimensional nano container supported corrosion inhibitor

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Embodiment 1

[0020] (1) Disperse 0.2g of graphene oxide in 150mL of aqueous solution. After uniformly dispersed by ultrasonic, add 0.1M zinc nitrate hexahydrate and 0.05M aluminum nitrate nonahydrate in sequence. After mixing evenly, slowly add 0.4M sodium nitrate dropwise And 0.2M sodium hydroxide mixed solution, adjust the pH of the mixed solution to 10±0.5;

[0021] (2) Heat the mixed solution obtained in step (1) in a 60℃ water bath for 12 hours, and then use deionized water for centrifugal washing 3 times to obtain graphene oxide / layered double hydroxide (GO / LDHs) composite material ;

[0022] (3) Disperse GO / LDHs in 100mL ethanol, then add 50mL 3-aminopropyltriethoxysilane (APTES), reflux at 110°C for 2h, and stir. The concentration of GO / LDHs is 5mg / mL~10mg / mL, then centrifuge the product, wash with ethanol 3 times, and then vacuum dry;

[0023] (4) The modified GO / LDHs composite material was added to the 0.1M sodium vanadate aqueous solution of pH=8, and stirred at 40°C for 24h. Then ...

Embodiment 2

[0027] (1) 0.2g of graphene oxide was dispersed in 200mL of aqueous solution. After the ultrasonic dispersion was uniform, 0.1M zinc nitrate hexahydrate and 0.05M aluminum nitrate nonahydrate were added in sequence. After mixing well, 0.4M sodium nitrate was slowly added dropwise. And 0.2M sodium hydroxide mixed solution, adjust the pH of the mixed solution to 10±0.5;

[0028] (2) Heat the mixed solution obtained in step (1) in a 60℃ water bath for 12 hours, and then use deionized water for centrifugal washing 3 times to obtain graphene oxide / layered double hydroxide (GO / LDHs) composite material ;

[0029] (3) Disperse GO / LDHs in 100mL ethanol, then add 50mL 3-aminopropyltriethoxysilane (APTES), reflux at 110°C for 2h, and stir. The concentration of GO / LDHs is 5mg / mL~10mg / mL, then centrifuge the product, wash with ethanol 3 times, and then vacuum dry;

[0030] (4) The modified GO / LDHs composite material was added to a 0.15M sodium vanadate aqueous solution of corrosion inhibitor w...

Embodiment 3

[0034] (1) 0.2g of graphene oxide is dispersed in 250mL of aqueous solution, after ultrasonic dispersion is uniform, 0.1M zinc nitrate hexahydrate and 0.05M aluminum nitrate nonahydrate are added in sequence, after mixing evenly, 0.4M sodium nitrate is slowly added dropwise And 0.2M sodium hydroxide mixed solution, adjust the pH of the mixed solution to 10±0.5;

[0035] (2) Heat the mixed solution obtained in step (1) in a 60℃ water bath for 12 hours, and then use deionized water for centrifugal washing 3 times to obtain graphene oxide / layered double hydroxide (GO / LDHs) composite material ;

[0036] (3) Disperse GO / LDHs in 100mL ethanol, then add 50mL 3-aminopropyltriethoxysilane (APTES), reflux at 110°C for 2h, and stir. The concentration of GO / LDHs is 5mg / mL~10mg / mL, then centrifuge the product, wash with ethanol 3 times, and then vacuum dry;

[0037] (4) The modified GO / LDHs composite material was added to a 0.1M sodium vanadate aqueous solution of corrosion inhibitor at pH=9, ...

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Abstract

The invention discloses a preparation method of a sol solution containing a two-dimensional nano container supported corrosion inhibitor. The method is based on oxidized graphene, uses zinc nitrate hexahydrate and aluminum nitrate nonahydrate as raw materials, the inhibitor nano container oxidized graphene / layered double hydroxide (GO / LDHs) with a two-dimensional structure is synthesized through acoprecipitation method, a modified GO / LDHs nano container is subjected to anion exchange after silanization modification, and corrosion inhibitor vanadate is supported to the GO / LDHs nano container;then, the corrosion inhibitor is added into a sol solution using 3-epoxy silane and zirconium salt as a precursor and using an anhydrous ethanol as solvent by adopting a wet transfer method, and the solution containing the two-dimensional nano container corrosion inhibitor is prepared.

Description

Technical field [0001] The invention relates to a preparation method of a sol solution containing a two-dimensional nano container loaded with a corrosion inhibitor. The coating prepared by the sol solution can provide effective corrosion protection for metals, and belongs to the field of metal protection materials. Background technique [0002] Sol-gel coating is one of the most promising protective coatings to protect metal substrates from corrosion. Traditionally, the coating has acted as a passive barrier, protecting the metal substrate from corrosive environments and water. However, various factors such as defects (pores and cracks), mechanical forces, and temperature shocks may cause the degradation and failure of the coating, which in turn causes the corrosion of the metal substrate. Therefore, while enhancing the passive protection performance of the sol-gel coating, it must also be given effective active protection performance. Generally, corrosion inhibitors are often...

Claims

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Application Information

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IPC IPC(8): C01B32/198C01G9/00C23F11/02
CPCC01B32/198C01G9/00C01P2004/04C23F11/02
Inventor 刘建华李应权于美熊亮亮李松梅刘宗奇
Owner BEIHANG UNIV
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