Vertical substrate grown cyclodextrin intercalation hydrotalcite film and preparation thereof

A technology of cyclodextrin and hydrotalcite, which is applied in the direction of hydrotalcite, chemical instruments and methods, coatings, etc., to achieve the effect of strong action and not easy to fall off

Inactive Publication Date: 2008-12-17
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no report on cyclodextrin-intercalated hydrotalcite films with laminates vertical to the substrate

Method used

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  • Vertical substrate grown cyclodextrin intercalation hydrotalcite film and preparation thereof
  • Vertical substrate grown cyclodextrin intercalation hydrotalcite film and preparation thereof
  • Vertical substrate grown cyclodextrin intercalation hydrotalcite film and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step A: Cut the aluminum sheet into 10cm×10cm pieces, ultrasonically clean them in absolute ethanol and deionized water for 3 minutes, then put them in 0.1M NaOH solution for 2 minutes, and rinse them with deionized water. The cleaned aluminum sheet was used as the anode, the lead sheet was used as the cathode, and 1M H 2 SO 4 The solution is used as electrolyte, and it is oxidized at constant pressure. The working voltage is 20V, and the oxidation area of ​​the aluminum sheet is about 100cm 2 , the oxidation current is 2A, the electrolysis time is 1h, and the electrolysis temperature is room temperature, so that an anodized aluminum oxide layer is formed on the surface of metal aluminum. During the oxidation process, small bubbles (H 2 ) produced, the surface of the anodized aluminum sheet after drying is white (for Al 2 o 3 film color). The samples were washed with a large amount of deionized water and dried at 70°C for later use.

[0025] Step B: take by weigh...

Embodiment 2

[0028] Step A: Obtain an AAO / Al substrate according to the method of Step A in Example 1.

[0029] Step B: take by weighing 2.974g Zn (NO 3 ) 2 ·6H 2O (0.1mol), 0.5g carboxymethylcyclodextrin (degree of substitution 4.1) and 4.8g NH 4 NO 3 (0.6mol) was dissolved in deionized water to make 100ml reaction synthesis solution, and then 1% NH 3 ·H 2 O adjusts the pH of the reaction synthesis liquid to 6.5. An anodized aluminum oxide / aluminum (AAO / Al) substrate with a size of 1 cm×2 cm was vertically suspended in the above reaction synthesis liquid, and reacted at 75° C. for 48 h. After the reaction, the sample is taken out, rinsed with deionized water, and dried at room temperature to obtain a cyclodextrin-intercalated hydrotalcite film.

[0030] It can be seen from the X-ray diffraction pattern that the cyclodextrin-intercalated hydrotalcite prepared by the in-situ growth method, carboxymethyl-β-cyclodextrin can enter the interlayer of the hydrotalcite film, and the interla...

Embodiment 3

[0032] Step A: Obtain an AAO / Al substrate according to the method of Step A in Example 1.

[0033] Step B: Weigh 2.932g Co(NO 3 ) 2 ·6H 2 O (0.1mol), 0.5g carboxymethylcyclodextrin (degree of substitution 4.1) and 4.8g NH 4 NO 3 (0.6mol) was dissolved in deionized water to make 100ml reaction synthesis solution, and then 1% NH 3 ·H 2 O adjusts the pH of the reaction synthesis liquid to 6.5. An anodized aluminum oxide / aluminum (AAO / Al) substrate with a size of 1 cm×2 cm was vertically suspended in the above reaction synthesis liquid, and reacted at 75° C. for 48 h. After the reaction, the sample is taken out, rinsed with deionized water, and dried at room temperature to obtain a cyclodextrin-intercalated hydrotalcite film.

[0034] It can be seen from the X-ray diffraction pattern that the cyclodextrin-intercalated hydrotalcite prepared by the in-situ growth method, carboxymethyl-β-cyclodextrin enters the interlayer of the hydrotalcite film through ion exchange, and the ...

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Abstract

The invention relates to a cyclodextrin pillared hydrotalcite film which grows in a way of being perpendicular to a basis and a preparation method thereof, belonging to the technical field of organic-inorganic composite materials and preparation thereof. The chemical formula of pillared hydrotalcite is [(M<2+><1-x> (M<3+><x> (OH)2<x+> (CMCD <n->) x/n question mark mH2O. The preparation method comprises the steps as follows: aluminium flakes are firstly anodized under the condition of constant voltage; divalent metal salts are taken and weighed respectively, cyclodextrin decorated with negative ion and NH4NO3 are dissolved in de-ionized water to prepare into reaction synthetic solution, and then ammonia is used for adjusting the pH of the reaction synthetic solution to a value between 5.9 and 8.5. Anodized alumina/aluminium-base flakes are vertically hung in the reaction synthetic solution to carry out reaction at certain temperature for a certain time to prepare the cyclodextrin pillared hydrotalcite film. The invention has advantages that: the cyclodextrin pillared hydrotalcite film prepared by an in-situ growth technology is fixed on an aluminium basis, thus realizing the immobilization and unitization of the hydrotalcite; besides, the hydrotalcite prepared has certain mechanical strength, which provides great convenience to the application of cyclodextrin pillared hydrotalcite materials both in production and life.

Description

[0001] Field [0002] The invention relates to the technical field of organic-inorganic composite materials and their preparation, and in particular provides a cyclodextrin-intercalated hydrotalcite film grown vertically on a substrate and a preparation method thereof. Cyclodextrin-intercalated hydrotalcite film materials aligned on alumina substrates. Background technique [0003] Due to its unique crystal structure and physical and chemical properties, hydrotalcite-like materials (LDHs) show extremely broad application prospects in many fields such as ion exchange, adsorption, catalysis, polymer modification, optical materials, magnetic materials, and electrical materials. . If the hydrotalcite-like film is made into a thin film to realize the deviceization of multifunctional LDHs materials, its application in industry will be greatly broadened. For example, when the hydrotalcite-like film is used as a catalyst, it can not only improve its use efficiency due to the increas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/04
CPCC01G51/006C01G53/006C01P2002/08C01P2002/22C01P2002/72C01P2004/01C25D11/08C08L5/16C01F7/785
Inventor 卫敏刘晓磊陆军段雪
Owner BEIJING UNIV OF CHEM TECH
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