Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of preparation method of porous alumina photonic crystal film with high saturation structural color

A porous alumina, photonic crystal technology, applied in the field of optical technology and electrochemistry, can solve the problems of complex operation and high production cost

Inactive Publication Date: 2020-11-03
HEBEI UNIV OF TECH
View PDF20 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This not only solves the problems of complex operation and high production cost in the past, but also can further expand the application of photonic crystal structure color in color display, anti-counterfeiting, decoration and other fields.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of preparation method of porous alumina photonic crystal film with high saturation structural color
  • A kind of preparation method of porous alumina photonic crystal film with high saturation structural color
  • A kind of preparation method of porous alumina photonic crystal film with high saturation structural color

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 Preparation of Porous Anodic Aluminum Oxide Photonic Crystal Thin Film Not Showing High Saturation Structural Color

[0026] (1) The high-purity aluminum sheet (99.999%) is placed in a tube furnace and annealed at 400°C for 2.5 hours (argon is used as the protective gas) to eliminate the internal stress of the aluminum sheet;

[0027] (2) Put the annealed aluminum sheet into an acetone solution and ultrasonically clean it for 3 minutes to remove surface grease, and then use a polishing solution with a volume ratio of perchloric acid to absolute ethanol of 1:4, with the aluminum sheet as the anode and the carbon plate as the Electropolish the cathode for 2 minutes under a DC 1A current; clean the surface polishing solution with deionized water, then clean the polished aluminum sheet with acetone and absolute ethanol in an ultrasonic oscillator, and dry it in the air;

[0028] (3) putting the processed aluminum flakes into 400ml concentration is 0.3mol / L oxalic ...

Embodiment 2

[0032] Example 2 shows the preparation of yellow porous anodic aluminum oxide photonic crystal film with high saturation structural color

[0033] Steps (1)-(3) are the same as in Embodiment 1.

[0034] (4) Rinse the oxidized aluminum sheet in step (3) with deionized water and dry it; then put it into a 0.3mol / L oxalic acid solution as the anode, use graphite as the cathode, and use a DC source for the second anode Oxidation: After uniformly increasing the oxidation voltage from 25V to 150V within 10S, 150V constant voltage reaction for 100S, take out the aluminum sheet, rinse it with deionized water and dry it.

[0035] figure 2 It is an optical picture of the porous anodized aluminum photonic crystal film prepared in step (4) under natural light, and it can observe high saturation, bright and uniform yellow color under natural light.

[0036] Figure 6It is a scanning electron micrograph of the porous alumina photonic crystal film prepared in step (4) after removing the ...

Embodiment 3

[0037] Example 3 shows the preparation of a green porous anodic aluminum oxide photonic crystal film with high saturation structural color

[0038] Steps (1)-(3) are the same as in Embodiment 1.

[0039] (4) Rinse the aluminum sheet oxidized in step (3) with deionized water and dry it; then put it into a 0.3mol / L oxalic acid solution as the anode, use graphite as the cathode, and use a DC source for the second anode Oxidation: After uniformly increasing the oxidation voltage from 25V to 150V within 10S, the 150V constant voltage reacted for 110S, took out the aluminum sheet, rinsed it with deionized water and dried it.

[0040] image 3 It is the porous anodized aluminum photonic crystal film prepared in the step (4), which can observe high saturation, vivid and uniform green color under natural light.

[0041] Figure 7 It is a scanning electron micrograph of the porous alumina photonic crystal film prepared in step (4) after removing the aluminum matrix, and the figure sho...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
lengthaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for preparing a porous alumina photonic crystal film with high-saturation structural color. The method comprises the following steps that a high-purity aluminum sheetis annealed, polished, washed and then used as an anode, graphite is used as a cathode and immersed in an oxalic acid solution, constant potential sinusoidal pulse is used for performing the first time of anodic oxidation, and photonic crystal is prepared; and after washing, the high-purity aluminum sheet is placed in the oxalic acid solution and subjected to the second time of anodic oxidation by using a large voltage supplied by a direct current stabilized power source to obtain the anodized alumina photonic crystal template with the high-saturation structural color. The method can observethe structural color with higher saturation without removing an aluminum substrate and depositing other materials in an alumina film, and further expands the application of the photonic crystal structural color in the fields of color display, anti-counterfeiting, decoration and the like.

Description

technical field [0001] The invention relates to a method for preparing a porous alumina photonic crystal film with high saturation structural color, belonging to the fields of optical technology and electrochemical technology. Background technique [0002] In recent years, with the gradual improvement of people's awareness of environmental protection, the pollution problems caused by the production and application of pigments and dyes have attracted more and more attention. Compared with the high pollution of pigments, a non-polluting bright color has aroused great interest, such as: the colors that appear on the wings of butterflies and the body walls of insects in nature. These bright colors are different from pigments, called structural colors, and have aroused people's research interest because of their non-polluting, iridescent effect, and never fading characteristics. With the in-depth research on photonic crystals, people realize that these structurally colored objec...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/12C25D11/10
CPCC25D11/024C25D11/045C25D11/10C25D11/12
Inventor 徐芹彭琪郝圣圳孙春心兰天王拥国
Owner HEBEI UNIV OF TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com