A compound of metal-organic framework encapsulating corrosion inhibitor and its preparation method and application

A technology of metal-organic framework and corrosion inhibitor, which is applied in the field of metal-organic framework-encapsulated corrosion inhibitor compound and its preparation, can solve the problems of lack of water stability and acid-sensitive dissociation, and achieve high output and high efficiency. The effect of small amount and high anti-corrosion efficiency

Active Publication Date: 2022-04-22
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Zeolite imidazole framework (ZIF) is a branch of the huge MOF family, which not only inherits the structural characteristics of MOF itself, but also has water stability and acid-sensitive dissociation properties that other MOF types do not have; currently , ZIF is mainly used in the fields of gas storage, gas separation, chemical sensors, catalysis and drug delivery, and there is no related report on the preparation of targeted corrosion inhibitors for marine corrosion protection.

Method used

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  • A compound of metal-organic framework encapsulating corrosion inhibitor and its preparation method and application
  • A compound of metal-organic framework encapsulating corrosion inhibitor and its preparation method and application
  • A compound of metal-organic framework encapsulating corrosion inhibitor and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0047] Preparation of ZIF-67 Encapsulated Copper Ion Modified Thiazole Corrosion Inhibitor Complex

[0048] The first step: preparation of copper ion-modified 2-mercaptobenzothiazole precursor:

[0049] Firstly, 3.95g of Tris base was dissolved in 13mL of deionized water, then the volume was adjusted to 25mL with deionized water, and then the pH was adjusted to 8.8 with ammonium chloride to obtain a buffer solution. Add 69 mg (0.41 mmol) 2-mercaptobenzothiazole and 50 mg (0.21 mmol) copper nitrate trihydrate (2-mercaptobenzothiazole to copper nitrate trihydrate molar ratio is about 2:1) at room temperature into the above buffer solution and stirred at room temperature for 30 min to obtain a copper ion-modified thiazole-containing corrosion inhibitor precursor with a yield of 83%.

[0050] The above-mentioned 2-mercaptobenzothiazole and copper nitrate trihydrate have a coordination reaction between copper ions and 2-mercaptobenzothiazole active groups at a molar ratio of 2 to ...

Embodiment 2

[0057] Preparation of ZIF-67 Encapsulated Copper Ion Modified Thiazole Corrosion Inhibitor Complex

[0058] The first step: preparation of copper ion-modified 2-mercaptobenzothiazole precursor:

[0059] Firstly, 3.95g of Tris base was dissolved in 13mL of deionized water, then the volume was adjusted to 25mL with deionized water, and then the pH was adjusted to 8.8 with ammonium chloride to obtain a buffer solution. Add 104mg (0.62mmol) 2-mercaptobenzothiazole and 50mg (0.21mmol) copper nitrate trihydrate (the molar ratio of 2-mercaptobenzothiazole to copper nitrate trihydrate is about 3:1) at room temperature into the above buffer solution and stirred at room temperature for 30 min to obtain a copper ion-modified thiazole-containing corrosion inhibitor precursor with a yield of 88%.

[0060] The above-mentioned 2-mercaptobenzothiazole and copper nitrate trihydrate have a coordination reaction between copper ions and 2-mercaptobenzothiazole active groups at a molar ratio of 2...

Embodiment 3

[0067] Preparation of ZIF-67 Encapsulated Copper Ion Modified Thiazole Corrosion Inhibitor Complex

[0068] The first step: preparation of copper ion-modified 2-mercaptobenzothiazole precursor:

[0069] Firstly, 3.95g of Tris base was dissolved in 13mL of deionized water, then the volume was adjusted to 25mL with deionized water, and then the pH was adjusted to 8.8 with ammonium chloride to obtain a buffer solution. Add 138mg (0.83mol) 2-mercaptobenzothiazole and 50mg (0.21mol) copper nitrate trihydrate (the molar ratio of 2-mercaptobenzothiazole to copper nitrate trihydrate is about 4:1) at room temperature into the above buffer solution and stirred at room temperature for 30 minutes to obtain a copper ion-modified thiazole-containing corrosion inhibitor precursor with a yield of 85%.

[0070] The above-mentioned 2-mercaptobenzothiazole and copper nitrate trihydrate have a coordination reaction between copper ions and 2-mercaptobenzothiazole active groups at a molar ratio of...

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Abstract

The invention discloses a metal-organic framework encapsulating a corrosion inhibitor compound and a preparation method and application thereof. The compound is composed of a ZIF metal-organic framework material and a corrosion inhibitor encapsulated therein. The composite material system is applied in the splash area of ​​seawater waves. Due to the local acidic environment at the initial stage of the alternating dry-wet cycle corrosion of carbon steel or metal products, the metal-organic framework is defective and the corrosion inhibitor is released, which can realize the targeting of the corrosion-induced area. protection. Further encapsulation of copper ion-modified thiazole corrosion inhibitors in metal-organic frameworks can obtain higher reprinting capacity. To inhibit the microbial corrosion caused by the growth of various aerobic bacteria on the surface of the substrate. Adopting the corrosion inhibition system of the present invention has strong targeting, high efficiency and durability, high cost performance, and has remarkable application value and broad market prospect.

Description

technical field [0001] The invention relates to the technical field of marine iron and steel anti-corrosion materials, and more specifically, to a metal-organic framework-encapsulated corrosion inhibitor compound and its preparation method and application. Background technique [0002] The marine environment can be divided into five corrosion zones, namely sea mud zone, full immersion zone, tidal zone, spray splash zone and atmospheric zone. Among them, the spray splash area is constantly soaked and dried alternately due to the influence of wind, waves, tides and other factors, so this area is very easy to form a rust layer on the surface of carbon steel and other substrates, and the closed battery composed of carbon steel and rust layer will pass through the electron The transfer generates hydrogen ions, causing a local acidic environment within the rust layer. In addition, metal products such as carbon steel will form a layer of water film with extremely high oxygen conte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F11/16
CPCC23F11/165
Inventor 李伟华冯锦华方俊博
Owner SUN YAT SEN UNIV
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