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A metal organic framework corrosion inhibitor hydrogel composite material and its preparation method and application

A metal-organic framework and corrosion-inhibitor technology, applied in the field of metal-organic framework corrosion inhibitor hydrogel composite materials and their preparation, can solve problems such as inability to recycle and reuse, and achieve excellent corrosion detection, high identification and high Selective, destructive effect

Active Publication Date: 2020-11-20
振业新材料(珠海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Xu et al. (2015) disclosed a method for Fe 3+ and Fe 2+ A highly selective and sensitive fluorescent probe Eu 3+ @MIL-124, is the first reported to have a good detection of Fe in aqueous environment 3+ and Fe 2+ ability, and the metal framework does not have any structure disintegration of europium ion functionalization doped metal organic framework material (Xu X Y, Yan B.Eu(III)-Functionalized MIL-124as Fluorescent Probe for HighlySelectively Sensing Ions and Organic Small Molecules Especially for Fe(III) and Fe(II)[J].ACS Applied Materials&Interfaces,2015,7(1):721-729.), can be used in displays or lighting light-emitting devices; however, it has not been used for Relevant reports on responding to and identifying the ionic chemistry of marine corrosion products and targeted repairing of corrosion sites; moreover, the existing nano-microencapsulated corrosion inhibitors for marine corrosion protection are basically disposable and cannot be recycled and reused

Method used

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  • A metal organic framework corrosion inhibitor hydrogel composite material and its preparation method and application
  • A metal organic framework corrosion inhibitor hydrogel composite material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1 Europium ion functionalized gallium-based metal-organic framework material Eu 3+ Preparation of @MIL-124(Ga)

[0036] Synthetic Eu 3+ @MIL-124(Ga), its chemical reaction equation is as follows:

[0037] 2Ga(NO 3 ) 3 +4H 2 O+C 9 h 6 o 6 = Ga 2 (OH) 4 (C 9 o 6 h 4 )+6HNO 3 (1)

[0038] Eu 3+ +3Ga 2 (OH) 4 (C 9 o 6 h 4 ) = [Eu 3+ ][Ga 2 (OH) 4 (C 9 o 6 h 4 )] 3 (2)

[0039] 1. First, 1.2g Ga(NO 3 ) 3 ·xH 2 O, 0.74g of trimellitic acid (molar ratio of 4:3) was mixed with 10mL of ultrapure water and stirred for 30min to obtain mixture A. The mixture A was transferred to a Teflon-lined hydrothermal synthesis reactor, and the mixture B was obtained after heating at 210°C for 24 hours. The initial pH values ​​before and after heating were 0.4 and 0.6, respectively. The mixture B was centrifuged at 13,000 rpm for 5 min to obtain a white solid powder, which was washed three times with ultrapure water and dried at 100° C. for 24 h to obt...

Embodiment 2

[0044] 1. Based on Eu 3+ Preparation of Corrosion Inhibitor Hydrogel Composite with Functionalized Ga-MOF Encapsulated BTA

[0045] Step 1: Preparation of BTA@Eu 3+ @MIL-124(Ga)

[0046] Get the Eu prepared by the above-mentioned embodiment of 0.12g 3+ @MIL-124(Ga) and 0.013g phenylacryltriazole (BTA), stirred in 15mL methanol solution for 12h, then centrifuged at 5500rpm for 20min, dried in vacuum at 100°C for 6h, to obtain BTA-loaded metal Organic framework material BTA@Eu 3+ @MIL-124(Ga).

[0047] Step 2: Preparation of BTA@Eu 3+@MIL-124(Ga) Corrosion Inhibitor Hydrogel Composite.

[0048] Add 2.26g of isopropylacrylamide, 0.154g of N,N'-methylenebisacrylamide and 0.289g of acrylic acid into 100mL of ultrapure water, heat to 70°C under nitrogen protection, and stir at 600rpm. After 1 hour, dissolve 1.5 mg of potassium persulfate in 1 mL of ultrapure water and add it dropwise to the mixed solution, resulting in turbidity. Heating was stopped after 4h, and the mixture...

Embodiment 3～12

[0053] According to the preparation process of the corrosion inhibitor hydrogel composite described in Example 2, and according to the recorded use range of raw materials, the amount of raw materials can be adjusted to obtain loaded BTA@Eu 3+ @MIL-124(Ga) with different amounts of corrosion inhibitor hydrogel compound, change the number of dry and wet alternate treatments of carbon steel (that is, before coating the corrosion inhibitor hydrogel compound, carbon steel should be treated at 3.5% Submerged in the sodium chloride solution for 8h, then took out and dried for 16h at a humidity of 50% and a temperature of 25°C, a treatment cycle was 24h), and the temperature of the sodium chloride solution soaked in carbon steel carried out the design of the embodiment (see Table 1).

[0054] The condition design of table 1 embodiment 3~12

[0055]

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Abstract

The invention discloses a metal-organic frame corrosion inhibitor hydrogel composite material and application thereof. According to the metal-organic frame corrosion inhibitor hydrogel composite material, europium-ion functional gallium-based metal-organic frame material Eu<3+>@MIL-124(Ga) loads a corrosion inhibitor and is packaged by a temperature-sensitive type hydrogel to form a reusable corrosion inhibitor hydrogel composite. According to the corrosion inhibitor hydrogel composite, the corrosion inhibitor is released through the window opening effect for targeted repair of corrosion sites, after the corrosion inhibitor film formation protaction, the temperature-sensitive type hydrogel can be easily peeled through phase separation, MOF and temperature-sensitive hydrogel are recovered,the role of "flaw-detection-type band-aid" for the corrosion of offshore engineering steel structures is played, the use of the corrosion inhibitor hydrogel composite can realize the quantitative detection, the alert response and the protection and repair function integration of marine corrosion, and significant application value and broad market prospects are achieved.

Description

technical field [0001] The invention relates to the technical field of marine iron and steel anticorrosion coating materials, more specifically, a metal organic framework corrosion inhibitor hydrogel composite material and its preparation method and application. Background technique [0002] At present, my country's marine development has entered a golden age, but marine corrosion is a major problem in the process of marine development, which seriously restricts the development of my country's marine economy. The marine environment is the most corrosive natural environment. Seawater is a highly corrosive electrolyte solution that contains a large amount of salts, including sodium chloride and salts containing elements such as potassium, bromine, and iodine. Marine corrosion can cause damage to steel structures in marine engineering, shorten service life, and lead to serious economic losses and even safety accidents. The application of organic migrating corrosion inhibitor ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F11/14C23F11/12
CPCC23F11/12C23F11/14
Inventor 李伟华方俊博冯锦华刘法谦
Owner 振业新材料(珠海)有限公司
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