Preparation method of stress-discoloring photonic crystal fibers

A photonic crystal fiber and stress-changing technology, applied in the direction of color-changing fluorescent materials, chemical instruments and methods, etc., can solve problems such as few reports, achieve fast and stable color change, fast and reversible structural color change

Inactive Publication Date: 2015-05-06
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the stress-chromic materials reported so far are film-like, while fibrous stress-chromic materials are rarely reported

Method used

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  • Preparation method of stress-discoloring photonic crystal fibers
  • Preparation method of stress-discoloring photonic crystal fibers
  • Preparation method of stress-discoloring photonic crystal fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Synthesis of highly oriented carbon nanotube arrays

[0027] Highly oriented carbon nanotube arrays grown by chemical vapor deposition (CVD) with a catalyst of Fe (1.2 nm) / Al 2 o 3 (3 nm) / Si, Al 2 o 3 and Fe are sequentially deposited on silicon wafers using electron beam evaporator, in which Al 2 o 3 layer as a buffer layer and Fe as a catalyst. Vinyl (90 cm 3 / min) as carbon source, hydrogen (30 cm 3 / min) and argon (400 cm 3 / min) was used as the carrier gas and grown in a tube furnace at 740 °C for ten minutes.

[0028] (2) Preparation of elastic fibers, taking polydimethylsiloxane (PDMS) as an example

[0029] Prepare PDMS precursor solution: Measure 10 g of elastomer and 1 g of curing agent and mix evenly. Ultrasonic dispersion is uniform, and vacuum is used to remove air bubbles. It was poured into a 1.5 mm diameter heat shrinkable tube and cured at 80 °C for 2 hours.

[0030] (3) Preparation of stress-changing photonic crystal fibers from green t...

Embodiment 2

[0033] (1) Synthesis of high arrays of aligned carbon nanotubes

[0034] Highly oriented carbon nanotube arrays grown by chemical vapor deposition (CVD) with a catalyst of Fe (1.0 nm) / Al 2 o 3 (10 nm) / Si, Al 2 o 3 and Fe are sequentially deposited on silicon wafers using electron beam evaporator, in which Al 2 o 3 layer as a buffer layer and Fe as a catalyst. Vinyl (30 cm 3 / min) as carbon source, hydrogen (90 cm 3 / min) and argon (400 cm 3 / min) was used as the carrier gas and grown in a tube furnace at 740 °C for fifteen minutes.

[0035] (2) Preparation of finer elastic fibers, taking polydimethylsiloxane (PDMS) as an example

[0036] Prepare PDMS precursor solution: Measure 5 g of elastomer and 0.75 g of curing agent and mix well. Ultrasonic dispersion is uniform, and vacuum is used to remove air bubbles. It was poured into a 0.8 mm diameter heat shrinkable tube and cured at 80 °C for 1.5 hours.

[0037] (3) Preparation of stress-changing photonic crystal fibers ...

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Abstract

The invention belongs to the technical field of intelligent materials, and in particular relates to carbon nanotube based stress-discoloring photonic crystal fibers and a preparation method thereof. The preparation method comprises the following steps: winding a height-oriented carbon nanotube as a conducting layer outside stretchable elastic polymer fibers serving as a substrate; depositing polymer microspheres by using an electrophoretic deposition method to form a photonic crystal with a periodic structure; then packaging the photonic crystal in a transparent elastomer; and finally, swelling the transparent elastomer to prepare the stress-discoloring photonic crystal fibers. The structural color of the photonic crystal fibers can be regulated and controlled by virtue of the particle size of the polymer microspheres and the sphere center distances among the microspheres. During stretching and restoring, the structural color of the photonic crystal fibers changes quickly and reversibly and comprises red, green and blue, and the color still changes quickly and stably even though the fibers are stretched for one thousand times. The photonic crystal fibers not only can be woven into many fabrics to show various patterns but also can be used as a sensor.

Description

technical field [0001] The invention belongs to the technical field of intelligent materials, and in particular relates to a preparation method of a stress-changing photonic crystal fiber. Background technique [0002] In nature, the body color of many animals can change as the environment changes, such as chameleons, cuttlefish, etc. Having this special ability can help them avoid natural enemies, regulate body temperature, prey, communicate, etc. [1,2] . Inspired by the color change of biological structures in nature, people are increasingly interested in preparing artificial functionalized materials or devices that can change color [1] . Imitating the structure of nature, the preparation of artificial functional materials has attracted a lot of attention, because the devices made of these materials have been widely used in many fields, such as smart displays, sensors, drives and so on. The color change behavior of this material under the action of light, temperature, c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K9/02
Inventor 彭慧胜孙雪梅张静
Owner FUDAN UNIV
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