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Method of driving flexible photonic crystal to change color based on shape memory alloy polymer

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

Active Publication Date: 2019-08-20
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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  • Method of driving flexible photonic crystal to change color based on shape memory alloy polymer
  • Method of driving flexible photonic crystal to change color based on shape memory alloy polymer
  • Method of driving flexible photonic crystal to change color based on shape memory alloy polymer

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preparation example Construction

[0044] S2. Preparation of flexible photonic crystals;

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

[0046] S202. Pouring Dow Corning 184 silicone rubber on the surface of the processed silicon wafer and heating at 40-80° C. for 2-6 hours to solidify, so as to prepare a flexible photonic crystal.

[0047] S3, preparation of the overall discoloration structure;

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

[0049] S4, discoloration process;

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

[0051] Wherein, the light source is a 5-40W white li...

Embodiment 1

[0060] 1) Preparation of the driver;

[0061] A shape memory alloy wire with a diameter of 1 mm is inserted into the designed rigid structure to form a U-shaped driving structure. Further, Ecoflex-0050 silicone rubber is poured on its surface and heated at 40°C for 3 hours to cure, forming a U-shaped driver based on a shape memory alloy polymer;

[0062] 2) Preparation of flexible photonic crystals;

[0063] A cylindrical array is processed on a silicon wafer by ion beam processing, in which the diameter of the cylinder is 400nm, the depth is 400nm, the hole spacing is 800nm, and the arrangement is triangular; Dow Corning 184 silicone rubber is poured on the surface of the processed silicon wafer and heated at 60°C for 4 Hours of curing, the preparation of flexible photonic crystals;

[0064] 3) Preparation of the overall color-changing structure;

[0065] The flexible photonic crystal is connected to the U-shaped driver based on the shape memory alloy polymer through the S...

Embodiment 2

[0071] 1) Preparation of the driver;

[0072] A shape memory alloy wire with a diameter of 0.4 mm is inserted into the designed rigid structure to form a U-shaped driving structure. Further, Ecoflex-0050 silicone rubber is poured on its surface and heated at 20°C for 6 hours to cure, forming a U-shaped driver based on a shape memory alloy polymer;

[0073] 2) Preparation of flexible photonic crystals;

[0074] Process a cylindrical array on a silicon wafer by ion beam processing, in which the diameter of the cylinder is 200nm, the depth is 200nm, the hole spacing is 400nm, and the arrangement is triangular arrangement; Dow Corning 184 silicone rubber is poured on the surface of the processed silicon wafer and heated at 40°C for 6 Hours of curing, the preparation of flexible photonic crystals;

[0075] 3) Preparation of the overall color-changing structure;

[0076] The flexible photonic crystal is connected to the U-shaped driver based on the shape memory alloy polymer thro...

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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 flexible photonic crystals to change color based on shape memory alloy polymers. Background technique [0002] Photonic materials (Photonic Materials) is an optical system with a nanoscale periodic arrangement on the surface. Different from the traditional color rendering mechanism, the macroscopic color of photonic crystals is generated by the complex interference phenomenon generated by the interaction between nanostructures and light with a wavelength scale similar to that of light. When changing the nanostructure and arrangement of photonic crystals , its macroscopic color will change accordingly, and then realize functions such as display and camouflage. This special mechanism endows the material with a series of unique optical phenomena and properties. Compared with the chemical color of traditional pigments, structural color has t...

Claims

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Application Information

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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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