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A method for driving flexible photonic crystals to change color based on shape memory alloy polymers

A memory alloy and photonic crystal technology, applied in optics, optical components, instruments, etc., can solve the problems of high driving voltage and insufficient flexibility of the overall structure of photonic crystal discoloration, so as to ensure stretchability, achieve precise control and stable display. , the effect of good discoloration effect

Active Publication Date: 2020-06-19
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for driving flexible photonic crystals to change color based on shape memory alloy polymers in view of the deficiencies in the above-mentioned prior art. Photonic crystal color-changing overall structural flexibility is insufficient and the driving voltage is too high. It is suitable for driving silicon rubber-based flexible photonic crystals to produce "red-yellow-green-blue" continuous color change, so that it can be used in flexible display, anti-counterfeiting treatment, human assistance, intelligent Cities and other fields have important application potential

Method used

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  • A method for driving flexible photonic crystals to change color based on shape memory alloy polymers
  • A method for driving flexible photonic crystals to change color based on shape memory alloy polymers
  • A method for driving flexible photonic crystals to change color based on shape memory alloy polymers

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preparation example Construction

[0044] S2. Preparation of flexible photonic crystals;

[0045] S201, processing a cylindrical array on a silicon wafer by ion beam processing, wherein the cylindrical diameter is 200-600 nm, the depth is 200-600 nm, the hole spacing is 400-1200 nm, and the arrangement is triangular;

[0046] S202: Pour the Dow Corning 184 silicone rubber on the surface of the processed silicon wafer and heat it at 40-80°C for 2-6 hours to cure to prepare a flexible photonic crystal.

[0047] S3. Preparation of overall discoloration structure;

[0048] The flexible photonic crystal is connected with the U-shaped driver based on shape memory alloy polymer through the Smooth-on silicone rubber adhesive.

[0049] S4. Discoloration process;

[0050] S401. First, fix the bottom of the U-shaped driver stably and adjust the intensity and position of the light source to make the surface of the photonic crystal appear red;

[0051] Among them, the light source is a 5-40W white light source, and the incident angle i...

Embodiment 1

[0060] 1) Preparation of the drive;

[0061] A shape memory alloy wire with a diameter of 1 mm is inserted into the designed rigid structure to form a U-shaped drive structure. Furthermore, the Ecoflex-0050 silicone rubber is poured on its surface and cured by heating at 40°C for 3 hours to form a U-shaped actuator based on a shape memory alloy polymer;

[0062] 2) Preparation of flexible photonic crystals;

[0063] The cylindrical array is processed on the silicon wafer by ion beam processing, the diameter of the cylinder is 400nm, the depth is 400nm, the hole spacing is 800nm, and the arrangement is triangular; the surface of the processed silicon wafer is poured with Dow Corning 184 silicone rubber and heated at 60℃4 Cured within hours to prepare flexible photonic crystals;

[0064] 3) Preparation of overall discoloration structure;

[0065] Connect the flexible photonic crystal with the U-shaped driver based on shape memory alloy polymer through Smooth-on silicone rubber adhesive;...

Embodiment 2

[0071] 1) Preparation of the drive;

[0072] A shape memory alloy wire with a diameter of 0.4mm is inserted into the designed rigid structure to form a U-shaped drive structure. Furthermore, the Ecoflex-0050 silicone rubber is poured on its surface and cured by heating at 20°C for 6 hours to form a U-shaped actuator based on a shape memory alloy polymer;

[0073] 2) Preparation of flexible photonic crystals;

[0074] The cylindrical array is processed on the silicon wafer by ion beam processing, the diameter of the cylinder is 200nm, the depth is 200nm, the hole spacing is 400nm, and the arrangement is triangular; the surface of the processed silicon wafer is poured with Dow Corning 184 silicone rubber and heated at 40℃6 Cured within hours to prepare flexible photonic crystals;

[0075] 3) Preparation of overall discoloration structure;

[0076] Connect the flexible photonic crystal with the U-shaped driver based on shape memory alloy polymer through Smooth-on silicone rubber adhesive...

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Abstract

The invention discloses a method of driving a flexible photonic crystal to change color based on a shape memory alloy polymer. With the shape memory alloy as a base material and a rigid structural member and a silicone rubber as composite materials, a driver is prepared; the flexible photonic crystal is then prepared and placed on the driver, DC is supplied to the driver to achieve deformation, and the flexible photonic crystal generates uniaxial stretching and color changing. The shape memory alloy polymer is used to drive the flexible photonic crystal to change color, the problems of insufficient flexibility and over high voltage of an electrochromic structure can be solved, the method is applicable to color changing occasions with high requirements on shape adaptability and use safety,and has important application potential in fields such as flexible display, anti-counterfeiting treatment, human assistance and smart cities.

Description

Technical field [0001] The invention belongs to the technical field of electrochromism, and in particular relates to a method for driving a flexible photonic crystal to change color based on a shape memory alloy polymer. Background technique [0002] Photonic Materials (Photonic Materials) is an optical system with a nano-scale periodic arrangement on the surface. Different from the traditional color rendering mechanism, the macroscopic color of photonic crystals is produced by the complex interference phenomenon produced by the interaction between nanostructures that are close to the wavelength scale of light and light. When changing the nanostructure of photonic crystals and their arrangement At the same time, its macro color will change accordingly, and then realize the functions of display and camouflage. This special mechanism gives the material a series of unique optical phenomena and properties. Compared with the chemical colors of traditional pigments, structural colors...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B26/00
CPCG02B26/007
Inventor 李博赵鹏飞陈花玲田洪淼
Owner XI AN JIAOTONG UNIV
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