Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (8): 124-129.doi: 10.13475/j.fzxb.20180805606

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Detection methods of photochromic textiles

ZHAO Boyan(), ZHAO Yuzhu   

  1. Shanghai Institute of Quality Inspection and Technical Research Institute of Fiber Inspection, Shanghai 200040, China
  • Received:2018-08-23 Revised:2019-04-29 Online:2019-08-15 Published:2019-08-16

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Abstract:

In order to provide the detection methods for the chromogenic performance of the photochromic textiles, taking commercial photochromic textiles as research objects, by simulating the excitation environment and measuring the color change of the commercial photochromic textiles with a portable spectrophotometer, the discoloration and recovery mechanism were studied and the detection methods of photochromic textiles were established. The results show that the color change of the samples increases first, then decreases and reaches stable after 3 min under irradiation. The discoloration and recovery processes are not influenced by the solar irradiance. One standard sunlight is provided as an excitation light source by using an AM1.5 filter and adjusting the irradiance to 1 000 W/m 2. The samples are irradiated for 5 min, and recovered for 30 min. The discoloration and recovery chromatic aberration of the photochromic textiles are determined by human eyes and instrument assessment to effectively detect the chromogenic performance of the photochromic textiles. The detection methods are simple, easy to operate,highly reliable, and can be standardized.

Key words: photochromic textile, chromogenic performance, detection method, eye rating, chromatic aberration measurement

CLC Number: 

  • TS107

Fig.1

Photochromic textile samples before (a)and after(b)discoloration"

Fig.2

Comparison diagram of xenon lamp spectra and standard solar spectra"

Fig.3

ΔEF trend of photochromic textiles under 1 000 W/m2 for 5 min"

Fig.4

Energy diagram of photochromism"

Fig.5

ΔEF trend graph of different photochromic textiles under 1 000 and 500 W/m2"

Tab.1

Recovery rate of photochromic textiles"

样品编号 ΔEF1 ΔEF2 νh/%
1# 41.20 10.34 75
2# 39.88 25.89 35
3# 26.95 19.50 28
4# 16.76 0.55 97
5# 12.92 0.72 94
6# 11.42 5.58 51

"

样品
编号		 照射5 min 遮光保
存5 min		 遮光保
存10 min		 遮光保
存30 min
人眼 仪器 人眼 仪器 人眼 仪器 人眼 仪器
1# 1 1 4~5 4 4~5 4 4~5 4~5
2# 2~3 1~2 4~5 3~4 4~5 3~4 4~5 4
3# 1 1 4~5 3~4 4~5 4 4~5 4~5
4# 1 1 3 3 4 3~4 4~5 4
5# 1 1 4~5 4~5 4~5 4~5 4~5 4~5
6# 2 2 4 4~5 4~5 4 4~5 4~5

Tab.3

Discoloration ΔEF and gray scale GSc"

ΔEF的范围 GSc/级 ΔEF的范围 GSc/级
<0.40 5 4.10≤ΔEF<5.80 2~3
0.40≤ΔEF<1.25 4~5 5.80≤ΔEF<8.20 2
1.25≤ΔEF<2.10 4 8.20≤ΔEF<11.6 1~2
2.10≤ΔEF<2.95 3~4 ≥11.6 1
2.95≤ΔEF<4.10 3

"

样品
编号		 变色色差 恢复色差
人眼 仪器 人眼 仪器
1# 1 1 4~5 4~5
2# 2~3 1~2 4~5 4
3# 1 1 4~5 4~5
4# 1 1 4~5 4
5# 1 1 4~5 4~5
6# 2 2 4~5 4~5

Fig.6

Comparison diagram of color simulation. (a)Before discoloration;(b)After discoloration;(c)Restoration color"

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