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Methionine-intercalated magnalium hydrotalcite nanocontainer and preparation method thereof

A technology of magnesium aluminum hydrotalcite and methionine, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve difficult problems such as methionine intercalation, and achieve operability Strong, environment-friendly and low-cost effects

Active Publication Date: 2019-01-18
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, methionine has a molecular structure, and it is difficult to intercalate methionine into the magnesium aluminum hydrotalcite layer by using the traditional co-precipitation method.

Method used

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  • Methionine-intercalated magnalium hydrotalcite nanocontainer and preparation method thereof
  • Methionine-intercalated magnalium hydrotalcite nanocontainer and preparation method thereof
  • Methionine-intercalated magnalium hydrotalcite nanocontainer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] (1) Mg(NO 3 ) 2 ·6H 2 O and Al(NO 3 ) 3 9H 2 O according to n(Mg 2+ ) / n(Al 3+ )=2:1 uniformly dispersed in deionized water to form solution A. Dissolve NaOH in deionized water to make a NaOH solution with a NaOH concentration of 1 mol / L to form solution B.

[0051] (2) Dilute methionine according to methionine and Mg(NO 3 ) 2 ·6H 2 O molar ratio 2:5 was weighed and uniformly dispersed in deionized water, adjusted to pH 8.5-9.0 with NaOH to form solution C.

[0052] (3) Transfer solution C to a four-neck flask, put it into a water bath, keep the temperature at 30 degrees Celsius under the condition of feeding nitrogen, and keep stirring, and add solution A dropwise to solution C after 1 hour, And use solution B to adjust the pH to maintain it at 8.5-9.0, and the temperature in the whole process is maintained at 30 degrees Celsius.

[0053] (4) After the dropwise addition was completed, the mixed solution was stirred for 30 minutes to complete the reaction, an...

Embodiment 2

[0055] (1) Mg(NO 3 ) 2 ·6H 2 O and Al(NO 3 ) 3 9H 2 O according to n(Mg 2+ ) / n(Al 3+ )=2:1 uniformly dispersed in deionized water to form solution A. Dissolve NaOH in deionized water to make a NaOH solution with a NaOH concentration of 1.5 mol / L to form solution B.

[0056] (2) Dilute methionine according to methionine and Mg(NO 3 ) 2 ·6H 2 O molar ratio 2:5 was weighed and uniformly dispersed in deionized water, adjusted to pH 9.0-9.5 with NaOH to form solution C.

[0057] (3) Transfer solution C to a four-neck flask, put it into a water bath, keep the temperature at 35 degrees Celsius under the condition of nitrogen gas and keep stirring, and add solution A dropwise to solution C after 1 hour, And use solution B to adjust the pH so that it is maintained at 9.0-9.5, and the temperature of the whole process is maintained at 35 degrees Celsius.

[0058] (4) After the dropwise addition was completed, the mixed solution was stirred for 30 minutes to complete the react...

Embodiment 3

[0060] (1) Mg(NO 3 ) 2 ·6H 2 O and Al(NO 3 ) 3 9H 2 O according to n(Mg 2+ ) / n(Al 3+ )=3:1 uniformly dispersed in deionized water to form solution A. Dissolve NaOH in deionized water to make a NaOH solution with a NaOH concentration of 1 mol / L to form solution B.

[0061] (2) Dilute methionine according to methionine and Mg(NO 3 ) 2 ·6H 2 O molar ratio 3:5 was weighed and uniformly dispersed in deionized water, adjusted to pH 8.5-9.0 with NaOH to form solution C.

[0062] (3) Transfer solution C to a four-neck flask, put it into a water bath, keep the temperature at 30 degrees Celsius under the condition of feeding nitrogen, and keep stirring, and add solution A dropwise to solution C after 1 hour, And use solution B to adjust the pH to maintain it at 8.5-9.0, and the temperature in the whole process is maintained at 30 degrees Celsius.

[0063] (4) After the dropwise addition was completed, the mixed solution was stirred for 30 minutes to complete the reaction, an...

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Abstract

The invention provides a methionine-intercalated magnalium hydrotalcite nanocontainer and a preparation method thereof. The preparation method comprises the following steps: mixing Mg(NO3)2.6H2O and Al(NO3)3.9H2O according to a molar ratio of (2-3):1 to form a solution A; dissolving NaOH to form a solution B; mixing methionine and the Mg(NO3)2.6H2O according to a molar ratio of (2-3):5 to form a solution C; dropwise adding the solution A into the solution C, and adjusting the pH by using the solution B to keep the initial pH values of a mixed solution and the solution C constant, wherein the temperature is 30-35 DEG C; after completion of dropwise addition, continuing stirring the mixed solution for 30 minutes; heating the mixed solution to 60 DEG C, standing for aging for 5-8 hours, thencentrifuging an obtained suspension, repeatedly washing by using deionized water till a neutral state, and finally drying an obtained solid product at 60 DEG C for 25-30 hours. By the preparation method, the preparation process is simple, the cost is low, the operability is strong, the production cycle is short, and an inhibitor contained in the prepared nanocontainer is environmentally friendly,can be controllably released and has excellent repairing performance; the nanocontainer has a good prospect in the field of metal anticorrosion.

Description

technical field [0001] The invention relates to a magnesium aluminum hydrotalcite nano container and a preparation method thereof, in particular to a magnesium aluminum hydrotalcite nano container intercalated with methionine and a preparation method thereof, belonging to the field of metal corrosion protection. Background technique [0002] The coating with inhibitors can effectively inhibit the corrosion of metals, but the inhibitors are directly added to the coating, which not only has poor dispersion, but also the inhibitors are easy to directly interact with the coating, resulting in inhibition The inhibitor is consumed in advance, which greatly reduces the self-healing performance of the inhibitor. One effective approach is to encapsulate the inhibitors into nanocontainers before adding them to the coating. When the coating is damaged, the nano-container encapsulated with the inhibitor releases the inhibitor to repair the damaged area, so as to achieve the expected se...

Claims

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Application Information

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IPC IPC(8): C09D5/08C09C1/40C09C1/02C09C3/08B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C09C1/02C09C1/40C09C3/08C09D5/08
Inventor 王艳力闫大帅张萌
Owner HARBIN ENG UNIV
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