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Infrared transmittance/reflectivity variable nano composite fiber and preparation method thereof

A technology of nanocomposite fiber and infrared transmittance, which is applied in the field of its preparation, fiber mat, and nanocomposite fiber, and can solve the problems of no fiber mat and no textile infrared radiation regulation

Inactive Publication Date: 2015-07-01
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are currently no reports of fiber mats containing vanadium dioxide, nor of textiles for infrared radiation regulation

Method used

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  • Infrared transmittance/reflectivity variable nano composite fiber and preparation method thereof
  • Infrared transmittance/reflectivity variable nano composite fiber and preparation method thereof
  • Infrared transmittance/reflectivity variable nano composite fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] VO 2 -PVP composite nanofiber mat (VO 2 The quality score is about 26%)

[0031] Mix and stir 0.7g of PVP (molecular weight: 1.3 million) and 9.3g of alcohol to dissolve the PVP, then add 0.25g of monoclinic phase vanadium dioxide nanoparticles (phase transition temperature is 40°C, the same below), and carry out ultrasonic dispersion for 5 hours Electrospinning. The spinning voltage is 15kV, the advancing speed of the syringe is 2.5ml / h, and the distance from the needle to the receiving screen is 15cm. Spinning for 10 minutes (test transmission spectrum) or 30 minutes (test diffuse reflection spectrum) to obtain a composite nanofiber mat with a fiber diameter of 500 nm. SEM photos are attached figure 2 , the transmission spectra at high temperature (60°C) and low temperature (20°C) are shown in the appendix image 3 , the infrared diffuse reflectance spectra at high temperature (60°C) and low temperature (20°C) are shown in the attached Figure 4 The dotted line...

Embodiment 2

[0033] VO 2 -PVP composite nanofiber mat (VO 2 The quality score is about 38%)

[0034]0.7g of PVP and 9.3g of alcohol were mixed and stirred to dissolve the PVP, then 0.5g of monoclinic vanadium dioxide nanoparticles were added, ultrasonically dispersed for 5 hours and then electrospun. The spinning voltage is 15kV, the advancing speed of the syringe is 2.5ml / h, and the distance from the needle to the receiving screen is 15cm. Spinning for 30 minutes to obtain a composite nanofiber mat with a fiber diameter of 500 nm. The transmission spectra at high temperature (60°C) and low temperature (20°C) are shown in the appendix image 3 , the infrared diffuse reflectance spectra at high temperature (60°C) and low temperature (20°C) are shown in the attached Figure 4 dotted line in .

Embodiment 3

[0036] VO 2 -PMMA composite nanofiber mat (VO 2 The quality score is about 21%)

[0037] 2.25g PMMA and 7.75g DMF (dimethylformamide) were mixed and stirred to dissolve PMMA, then 0.6g monoclinic phase vanadium dioxide nanoparticles were added, and electrospinning was performed after ultrasonic dispersion for 5 hours. The spinning voltage is 10kV, the advancing speed of the syringe is 1.5ml / h, and the distance from the needle to the receiving screen is 15cm. A composite nanofiber mat with a fiber diameter of 1 μm was obtained by spinning for 30 minutes. SEM photos are attached Figure 5 .

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Abstract

The invention relates to infrared transmittance / reflectivity variable nano composite fiber and a preparation method thereof. The nano composite fiber comprises an organic polymer and rutile phase vanadium dioxide nano particles composited in the organic polymer, wherein mass fraction of rutile phase vanadium dioxide nano particles is 0.5-50%, and diameter of the nano composite fiber is 100nm-2mum.

Description

technical field [0001] The invention relates to the technical field of nanofibers, in particular to a nanocomposite fiber containing vanadium dioxide nanoparticles with variable infrared transmittance / reflectance, a preparation method thereof and a fiber mat made thereof. Background technique [0002] Vanadium dioxide is a material with a variety of crystal structures. At 68 °C, there is a reversible phase transition from a low-temperature monoclinic phase (M phase) semiconductor state to a high-temperature tetragonal phase (R phase) metallic state. With this phase transition, the material The optical and electrical properties change suddenly. Based on the change of optical transmittance before and after the phase transition of vanadium dioxide, it is applied to smart window materials (G.Xu, P.Jin, M.Tazawa, K.Yoshimura, Optimization of antireflection coating for VO 2 -based energy efficient window, Solar Energy Materials and Solar Cells, 83(2004) 29-37), the smart window h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F1/10D01D5/00D04H1/728D04H1/413
Inventor 金平实李绍唐李亚梅纪士东
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI