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Hydrotalcite-like film with reversible change-over photoresponse soakage capability and method of producing the same

A light-responsive, hydrotalcite technology, applied in the preparation of oxide/hydroxide, coating, etc., can solve the problems of small transformation range and easy damage of monolayer organic film, and achieve good repeatability and superior light-responsive infiltration. The effect of reversible conversion performance and easy availability of raw materials

Inactive Publication Date: 2011-11-09
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Azobenzene and its derivatives can achieve reversible changes in wetting properties through light-induced configuration reversal, but the monolayer organic films prepared by adsorption or LB technology are easily damaged, and the transformation range is small, which limits their application. sex

Method used

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  • Hydrotalcite-like film with reversible change-over photoresponse soakage capability and method of producing the same
  • Hydrotalcite-like film with reversible change-over photoresponse soakage capability and method of producing the same
  • Hydrotalcite-like film with reversible change-over photoresponse soakage capability and method of producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 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.

[0030] 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.

[0031] 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

[0035] 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.

[0036] 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 6.0 with dilute ammonia water.

[0037] The surface anodized aluminum substrate was suspended vertically in the reaction solution, under N 2 In the atmosphere, react at a constant temperature at 45°C for 60 hours. Aft...

Embodiment 3

[0040] 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.

[0041] In a 1000mL reaction vessel, 0.12mol Zn(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.

[0042] 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 present invention relates to a photoresponsive wettability reversible hydrotalcite-like film and a preparation method thereof, and belongs to the technical field of hydrotalcite-like films. The chemical general expression of the film is [Zn<2+>1-xAl<3+>x(OH)2]<x+>(R)x.yH2O, wherein R represents anion of an azobenzol surfactant CF3AZO<->; and x is more than or equal to 0.2 and less than or equal to 0.4, and y is more than or equal to 0 and less than or equal to 2. The present invention has the advantages that the surface of the prepared ZnAl-R-LDHs film material has a nano / micron composite structure; the film has excellent photoresponsive wettability reversible performance; when the film is illuminated by visible light, the contact angle between the film and a water drop reaches between 145 and 159 DEG; and after the film is illuminated by ultraviolet, the contact angle between the film and the water drop reaches between 45 and 72 DEG. The method has simple process, available raw materials, low cost, and good repetitiveness; and the ZnAl-R-LDHs film grown in situ by the anion of the azobenzol surfactant can be taken as a biosensor, an intelligent film, a reversible switch device, a microfluidic device, and the like for use.

Description

technical field [0001] The invention belongs to the technical field of hydrotalcite films, in particular to a hydrotalcite-like film with reversible conversion of light-responsive wetting properties and a preparation method thereof, and a hydrotalcite-like film grown in situ on an aluminum substrate by intercalation of azobenzene anions. 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 elements and exchangeability of anions between layers. This special chemical and structural property not only makes it have ion exchange properties,...

Claims

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Application Information

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IPC IPC(8): C01B13/14C09D1/00C09D5/00
Inventor 张法智陈涛段雪徐赛龙
Owner BEIJING UNIV OF CHEM TECH