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Copper-based ternary hydrotalcite thin film and preparation method thereof

A technology of hydrotalcite and film, which is applied in the direction of metal material coating process, coating, solid-state chemical plating, etc., can solve the problems of human hazards, environmental pollution, and not being effectively solved, and achieves not easy to fall off, high adhesion, Great adhesion effect

Active Publication Date: 2012-09-19
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both of these methods use a large amount of electrolytes, such as sulfate, chromate, phosphate, etc., which have caused serious pollution to the environment, especially Cr 6+ It is very harmful to the human body
Although low-chromium treatment, closed systemization and other processes have been developed in recent years, they still cannot fundamentally solve the serious pollution caused by surface treatment to the environment.
However, the recently developed organic self-assembled thin films still have some key technical problems in application that have not been effectively resolved due to their limitations in surface coverage, defects, and heat resistance. Relatively speaking, LDHs, as an important inorganic Functional materials, in the field of metal anti-corrosion, show broad application prospects as non-toxic and harmless anti-corrosion films

Method used

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  • Copper-based ternary hydrotalcite thin film and preparation method thereof
  • Copper-based ternary hydrotalcite thin film and preparation method thereof
  • Copper-based ternary hydrotalcite thin film and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0035] A Cut copper sheets with a purity greater than 90% into 2*2cm pieces, soak them in ethanol and anhydrous sodium carbonate, then ultrasonically clean them with 1% hydrochloric acid, rinse them with deionized water, and dry them for later use.

[0036] B Add 64.76g of aluminum isopropoxide to 4L of dilute nitric acid solution with a concentration of 0.05mol / L, stir for 5-10min, heat rapidly to 80°C, reflux at constant temperature for about 6h, and form a translucent sol after cooling. The sol is centrifuged to remove the precipitate to obtain the boehmite sol.

[0037] C Weigh 11.769g of zinc nitrate, prepare 1L solution, and mix the same amount of zinc nitrate with boehmite sol. Adjust the pH value to about 7.0 with 0.1% ammonia water. Put it into the polytetrafluoroethylene reactor, put it into the treated copper sheet, put it in an oven at 60 ° C for 3 days, take out the reactor, cool it, take out the copper sheet, rinse it with deionized water and dry it. A copper-z...

Embodiment 2

[0039] A. With embodiment 1.

[0040] B Add 60g of aluminum isopropoxide to 4L of dilute nitric acid solution with a concentration of 0.05mol / L, stir for 5-10min, heat rapidly to 85°C and reflux for about 8h, and form a translucent sol after cooling. Centrifuge the sol to remove the precipitate to obtain the boehmite sol;

[0041] C Weigh 11.769g of zinc nitrate, prepare 1L solution, and mix the same amount of zinc nitrate with boehmite sol. Adjust the pH value to about 8.0 with 0.5% ammonia water. Put it into the polytetrafluoroethylene reactor, put the treated copper sheet into it, put it in an oven at 70°C for 3 days, take out the reactor, cool it, take out the copper sheet, wash it with deionized water and dry it, that is A copper-zinc-aluminum composite oxide film can be obtained on the surface of the substrate.

Embodiment 3

[0043] A. With embodiment 1.

[0044] B Add 50g of aluminum isopropoxide to 4L of dilute nitric acid solution with a concentration of 0.05mol / L, stir for 5-10min, heat rapidly to 90°C and reflux for about 12h, and form a translucent sol after cooling. The sol is centrifuged to remove the precipitate to obtain the boehmite sol.

[0045] C Weigh 23.5375g of zinc nitrate, prepare 1L solution, and mix the same amount of zinc nitrate with boehmite sol. Adjust the pH value to 7.5 with 1% ammonia water. Put it into the polytetrafluoroethylene reactor, put the treated copper sheet into it, put it in an oven at 75°C for 3 days, take out the reactor, cool it, take out the copper sheet, wash it with deionized water and dry it, that is The copper-zinc-aluminum composite oxide thin film material can be obtained on the surface of the substrate.

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Abstract

The invention relates to a copper-based ternary hydrotalcite thin film and a preparation method thereof, wherein a copper-zinc-alumium composite oxide thin film material complete, even and compact in crystal form is synthesized on a copper substrate by an in-situ growth method, and the thin film is high in adhesion and not easy to fall off. The method for preparing the thin film provided in the invention comprises the following steps of: putting a copper sheet in the mixed solution of boehmite sol and zinc nitrate, and growing CuZnAl-LDHs hydrotalcite thin film in situ on the copper sheet by controlling the reaction conditions such as pH, reaction temperature and time. The copper source of the copper-based ternary hydrotalcite thin film comes from the surface of the substrate; and compared with a hydrotalcite thin film formed through simple deposition on the substrate, the prepared thin film is better in adhesion to the substrate. Besides, the material has good corrosion resistance and is capable of protecting copper.

Description

technical field [0001] The invention relates to a copper-based ternary hydrotalcite film and a preparation method thereof, in particular to a copper-zinc-aluminum ternary hydrotalcite film grown on a copper substrate and a preparation method thereof. Background technique [0002] Layered double hydroxides (LDHs for short, also known as hydrotalcite-like) are a large class of inorganic layered functional materials with unique supramolecular structure characteristics. The type and quantity of anions can be adjusted within a certain range, and have been used in many fields of the national economy as high-performance catalytic materials, adsorption materials, separation materials, and functional auxiliary materials. [0003] The in-situ growth method is to synthesize LDHs film in-situ on the copper substrate by controlling certain preparation conditions. The substrate is not only used as a substrate for fixing LDHs films, but also provides the chemical composition substances r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C20/06
Inventor 雷晓东王琳娜孙晓明
Owner BEIJING UNIV OF CHEM TECH
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