Journal of Textile Research ›› 2021, Vol. 42 ›› Issue (02): 21-26.doi: 10.13475/j.fzxb.20201006007

• Fiber Materials • Previous Articles     Next Articles

Preparation of nano-tungsten oxide composite cotton fiber and its photochromic properties

WANG Yuting, LING Zhongwen, YANG Xin, LIU Yuqing()   

  1. College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu 215123, China
  • Received:2020-10-26 Revised:2020-11-16 Online:2021-02-15 Published:2021-02-23
  • Contact: LIU Yuqing E-mail:shliuyq@163.com

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Abstract:

In order to solve the problems of unstable crystal structure, long photochromic response time and short life of tungsten oxide, light yellow tungsten oxide nanorods were prepared by the hydrothermal one-step method for uniform dispersion into polyvinyl alcohol solution with aid of magnetic stirring. Cotton fiber was coated with tungsten oxide nanorods by rapid and continuous impregnation coating process, and its structure and properties were characterized. The results show that under the irradiation of ultraviolet light, the color of photochromic fiber changes from light yellow to grayish blue in 1 min, and gradually to dark blue in 5 min, and the color of photochromic fiber returns to its initial state in about 2 h during infrared heating treatment, showing a fast and reversible color switch from light yellow to dark blue. The photochromic fiber can be produced on a large scale and can be woven into various patterns, which has great potential in developing photochromic textiles.

Key words: photochromic fiber, tungsten oxide nanorod, hydrothermal one-step method, solution coating method, smart clothing

CLC Number: 

  • TS11

Fig.1

Schematic diagram of manufacturing process of photochromic fiber"

Fig.2

Micro-morphology images of WO3 nanorods. (a) SEM image; (b) HR-TEM image"

Fig.3

Color change of WO3 nanorod powder after ultraviolet irradiation and infrared heating"

Fig.4

UV-visible diffuse reflectance spectra of WO3 nanorods. (a) UV-visible diffuse reflectance spectra at different UV irradiation time; (b) Reflection intensity at 600 nm after one coloring-bleaching cycle; (c) Reflection intensity at 600 nm after five coloring-bleaching cycle"

Fig.5

XPS spectra of WO3 nanorods(a)and its W4f double peak enlargement(b)"

Fig.6

Preparation mechanism of photochromic fiber"

Fig.7

SEM images of photochromic fiber. (a) Surface image; (b) Cross-section image; (c) Edge of cross-section image"

Fig.8

Ultraviolet-visible diffuse reflectance spectra of photochromic fibers. (a) UV-visible diffuse reflectance spectra at different illumination time; (b) Reflection intensity at 600 nm in different environments; (c) Reflectivity intensity at 600 nm after five coloring- bleaching cycle"

Fig.9

Tensile strength-elongation curve of cotton and photochromic fiber"

Fig.10

Photographs of various shapes of photochromic fibers before(a)and after(b)UV irradiation"

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