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Method for improving functional hydrotalcite thin film photo-thermal stability

A technology of stable performance and hydrotalcite, applied in the preparation of oxide/hydroxide, etc., can solve the problems of easy breakage of the film, poor heat resistance, and small change in wettability.

Inactive Publication Date: 2011-05-11
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Azobenzene and its derivatives can achieve reversible changes in wetting properties through light-induced configuration reversal, but the organic monolayer self-assembled films prepared by surface adsorption or LB technology are easy to be damaged, and the wettability transition is small. After time or times of ultraviolet light, the wetting transition performance of the film is greatly reduced, and the heat resistance is poor, so its application has great limitations

Method used

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  • Method for improving functional hydrotalcite thin film photo-thermal stability
  • Method for improving functional hydrotalcite thin film photo-thermal stability
  • Method for improving functional hydrotalcite thin film photo-thermal stability

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Clean the aluminum sheet with a purity of 99.5% and a thickness of 0.1 mm with absolute ethanol to remove surface oil stains, wash it with deionized water, soak the aluminum sheet with a concentration of 5% sodium hydroxide solution to remove the natural oxide layer on the surface, and finally use Wash with deionized water. The treated aluminum sheet was used as the anode, the lead plate was used as the cathode, the sulfuric acid solution of 1.0 mol / L was used as the electrolyte, the oxidation current was 2A, and the reaction time was 1 hour to obtain anodized aluminum sheet for future use.

[0032] In a 1000mL reaction vessel, 0.06mol Zn(NO 3 ) 2 ·6H 2 O and 0.24mol NH 4 NO 3 Dissolve in 600mL of deionized water, and adjust the pH of the solution to 7.0 with dilute ammonia water.

[0033] Suspend the anodized aluminum substrate vertically in the reaction solution, and react at a constant temperature of 45°C for 60 hours. After the reaction, take out the aluminum s...

Embodiment 2

[0038] Clean the aluminum sheet with a purity of 99.5% and a thickness of 0.1 mm with absolute ethanol to remove surface oil stains, wash it with deionized water, soak the aluminum sheet with a concentration of 5% sodium hydroxide solution to remove the natural oxide layer on the surface, and finally use Wash with deionized water. The treated aluminum sheet was used as the anode, the lead plate was used as the cathode, the sulfuric acid solution of 1.0 mol / L was used as the electrolyte, the oxidation current was 2A, and the reaction time was 1 hour to obtain anodized aluminum sheet for future use.

[0039] In a 1000mL reaction vessel, 0.06mol Ni(NO 3 ) 2 ·6H 2 O and 0.24mol NH 4 NO 3 Dissolve in 600mL of deionized water, and adjust the pH of the solution to 6.0 with dilute ammonia water.

[0040] The surface anodized aluminum substrate was suspended vertically in the reaction solution, under N 2 In the atmosphere, react at a constant temperature of 45°C for 60 hours. Aft...

Embodiment 3

[0044] Clean the aluminum sheet with a purity of 90% and a thickness of 0.1 mm with absolute ethanol to remove surface oil stains, wash it with deionized water, soak the aluminum sheet with a concentration of 5% sodium hydroxide solution to remove the natural oxide layer on the surface, and finally use Wash with deionized water. The treated aluminum sheet was used as the anode, the lead plate was used as the cathode, the sulfuric acid solution of 1.0 mol / L was used as the electrolyte, the oxidation current was 2A, and the reaction time was 2 hours to obtain anodized aluminum sheet for future use.

[0045] In a 1000mL reaction vessel, 0.12mol Co(NO 3 ) 2 ·6H 2 O and 0.6mol NH 4 NO 3 Dissolve in 600mL of deionized water, and adjust the pH of the solution to 7.0 with dilute ammonia water.

[0046] The surface anodized aluminum substrate was suspended vertically in the reaction solution, under N 2 In the atmosphere, react at a constant temperature of 45°C for 72 hours. After...

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Abstract

The invention relates to a method for improving the photo-thermal stability of functional houghite film, belonging to the technical field of the houghite film. The preparation steps comprises: a lead plate or a stainless steel plate is taken as cathode, 0.5-3mol / L of sulfuric acid solution is taken as electrolyte, electrolysis is carried out for 0.5-5h under the oxidation current of 1-5A, and anodized aluminum sheets are obtained for standby application; soluble bivalence inorganic salt M<2+>(Y<n->)2 / n and (NH4)nY<n-> are dissolved into de-ionized water according to the mol ratio of 3-30 and prepared into mixed solution; the anodized aluminum sheets are vertically suspended and placed into the reaction solution to react and obtain an MAl-LDHs film with interlayer anion of Y<n->; the prepared Mal-LDHs film is vertically suspended and placed into azobenzol salt (CF3AZO<->N<+>) solution, and an MAL-R-LDHs film wtih surface active agent anion intercalation. The houghite film has reversible wetting quality and photo-thermal stability.

Description

technical field [0001] The invention belongs to the technical field of hydrotalcite films, in particular to a method for improving the photothermal stability of a functional hydrotalcite film (with reversible wettability), a hydrotalcite-like film with reversible conversion of light-responsive wettability, which improves its photothermal stability. A method for stabilizing performance, azobenzene anion intercalation hydrotalcite-like thin films grown in situ on aluminum substrates. Background technique [0002] Hydrotalcites (LDHs), also known as double-hydroxy composite metal oxides, are anionic clays whose general chemical formula is [M II 1-x m III x (OH) 2 ] x+ (A n- ) x / n ·yH 2 O, where M II and M III They are divalent and trivalent metal cations respectively, located on the main laminate; A n- is an interlayer anion; x is M III / (M II +M III ) molar ratio; y is the number of interlayer water molecules. LDHs have a layered structure, tunability of layer e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B13/14
Inventor 张法智陈涛卢伟段雪徐赛龙
Owner BEIJING UNIV OF CHEM TECH