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Reversible electrochromism composite fiber and preparation method thereof

A composite fiber and carbon nanotube fiber technology, which is applied in the fields of carbon fiber, fiber treatment, textiles and papermaking, etc., can solve the problems such as the difficulty of conformational transformation of polydiyne, and achieve the effect of wide application potential and simple preparation method

Inactive Publication Date: 2011-02-02
宁国市龙晟柔性储能材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There have been a lot of studies on the new sensing function of polydiynes, but as far as we know, there is no report on the current-induced discoloration of polydiynes, and the discoloration of polydiynes induced by many factors is irreversible.
However, it is very difficult to induce the conformational transition of pure polydiynes under the action of an electric field.

Method used

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  • Reversible electrochromism composite fiber and preparation method thereof
  • Reversible electrochromism composite fiber and preparation method thereof
  • Reversible electrochromism composite fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

specific example 1

[0037] Monomer CH 3 (CH 2 ) 11 C≡C-C≡C(CH 2 ) 8 COOH was dissolved in tetrahydrofuran to prepare a 10 mg / ml diyne monomer solution. Then the carbon nanotube fibers with a diameter of 11 μm were immersed in the diacetylenic monomer solution for 10 minutes, and the solvent was evaporated at room temperature after taking it out. Place in fume hood for 24 hours. Irradiate with a UV lamp with a wavelength of 254nm at a distance of 17cm from the fiber for 1 hour to polymerize the diacetylene monomer on the fiber to obtain a blue carbon nanotube / polydiyne composite fiber. Take a piece of fiber and fix it on the glass substrate, and connect the two ends with silver glue and gold wire. The gold wire is connected with the current source, and the current is passed through. Continuously increasing the current value, when the current is less than 10mA, the composite fiber has no obvious change. When the current is greater than 10mA but less than 30mA, the composite fiber turns red ...

specific example 2

[0039] The monomer HOOC(CH 2 ) 8 C≡C-C≡C(CH 2 ) 8 COOH was dissolved in tetrahydrofuran to prepare a 10 mg / ml diyne monomer solution. Then the carbon nanotube fibers with a diameter of 11 μm were immersed in the diacetylenic monomer solution for 30 minutes, and the solvent was evaporated at room temperature after taking it out. Place in fume hood for 24 hours. Irradiate with an ultraviolet lamp with a wavelength of 254nm at a distance of 17 cm from the fiber for 1.5 hours to polymerize the diacetylenic monomer on the fiber, and also obtain blue carbon nanotube / polydiyne composite fiber. Take a piece of fiber and fix it on the glass substrate, and connect the two ends with silver glue and gold wire. The gold wire is connected with the current source, and the current is passed through. Continuously increasing the current value, when the current is less than 10mA, the composite fiber has no obvious change. When the current is greater than 10mA but less than 30mA, the compo...

specific example 3

[0041] Monomer HOCH 2 C≡C-C≡CCH 2 OH was dissolved in tetrahydrofuran to prepare a 10mg / ml diyne monomer solution. Then the carbon nanotube fibers with a diameter of 11 μm were immersed in the diacetylenic monomer solution for 20 minutes, and the solvent was evaporated at room temperature after taking it out. Place in fume hood for 24 hours. Irradiate with an ultraviolet lamp with a wavelength of 254nm at a distance of 17 cm from the fiber for 2 hours to polymerize the diyne monomer on the fiber to obtain an orange carbon nanotube / polydiyne composite fiber. Take a piece of fiber and fix it on the glass substrate, and connect the two ends with silver glue and gold wire. The gold wire is connected with the current source, and the current is passed through. Continuously increasing the current value, when the current is less than 10mA, the composite fiber has no obvious change. When the current is greater than 10mA and less than 30mA, the composite fiber turns brown within 2 ...

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Abstract

The invention belongs to the technical field of intelligent materials, relating to an electrochromism composite fiber. The composite fiber comprises a hollow carbon nano tube; polydiacetylene is formed in the carbon nano tube, when current is not led into the two ends of the composite fiber, the composite fiber presents the first color; when the current led into the composite fiber exceeds a critical value, the color of the composite fiber changes into the second color; and when the current led into the two ends of the composite fiber is turned off, the color restores into the first color. The preparation method of the composite fiber comprises the following steps: preparing a carbon nano tube erect column by a chemical vapor deposition method, and spinning into the carbon nano tube fiber; and dipping diyne monomer to the carbon nano tube fiber, and irradiating by utilizing ultraviolet rays, X-ray and gamma-ray to polymerize the diyne monomer into the carbon nano tube / polydiacetylene compound fiber. The electrochromic effect of the compound has repeat reversible comprehensive electrochromic performance, and has wide application potency and simple preparation method.

Description

technical field [0001] The invention relates to the technical field of intelligent materials, in particular to a composite fiber material with reversible electrochromic effect and a preparation method thereof. Background technique [0002] Due to the delocalization effect of π electrons along the main chain, conjugated polymers have good electrical and optical properties, and have been widely studied and applied in optoelectronics and sensors. For example, polydiyne (PDA) can produce color changes under different external stimuli. Common stimuli include temperature, pH value, chemical reagents, stress and ligand action. The typical color change is from blue to red. It has been developed and applied as a color difference sensor material. This color change is due to a change in the molecular conformation of the polydiyne when stimulated by external conditions. To be precise, the increase in the freedom of movement of the polydiyne side chains caused by external stimuli makes...

Claims

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Application Information

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IPC IPC(8): D06M15/227D06M101/40
Inventor 彭慧胜孙雪梅
Owner 宁国市龙晟柔性储能材料科技有限公司
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