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Figure 1.
(a) Morphology and appearance changes of the four color of PET texitles after UV exposure under a microscope. (b) Different shapes of textiles during the weathering process.
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Figure 2.
(a) Microscope image associated to the photoaging induced fragmentation of different colored PET microfiber in coastal seawater. Size distribution of different colored PET microfibers (b) yellow, (c) green, (d) blue, (e) purple, during UV aging in coastal seawater.
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Figure 3.
Chromaticity value changes of textiles with different colors after UV exposure.
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Figure 4.
Mass changes of different PET sewing threads under (a) dark, and (b) UV light conditions. (c) Changes of fragmentation ratio of different PET microfiber during photoaging in coastal seawater. (d) Chromatic aberration (ΔE) of different colored PET microfiber during UV light irradiation in seawater matrices.
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Figure 5.
(a) FTIR spectra, and (b) carbonyl index of different colored PET microfibers within 12 d treatment under UV light and darkness conditions. Crystallinity changes of different colored PET microfibers within 12 d treatment under (d) darkness conditions, and (e) UV light. Fitting results of (c) increased CI, and (f) crystallinity with aging time for different colored PET.
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Figure 6.
EPR spectra of (a) purple, (b) green, and different disperse dyes under (d) darkness and (e) UV light conditions. Quantification analysis for the (c) •OH formation of different colored PET microfibers, and (f) different disperse dyes under UV irradiation.
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Figure 7.
Scheme for the prolonged photoaging of different colored PET textiles induced PET microfiber release into surrounding coastal seawater.
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Textile color Pirstine Dark
12 dUV exposed Grade
(staining fastness)2 d ΔE 12 d ΔE 2 d 12 d Yellow 
5.56 ± 0.19 
11.21 ± 0.53 4–5 4 Green 
6.73 ± 0.34 
14.61 ± 0.51 4 2–3 Blue 
9.62 ± 0.26 
16.69 ± 0.60 4 3 Purple 
8.39 ± 0.23 
23.37 ± 1.49 4 2 Table 1.
Chromogenic performance of different color textiles after UV exposure
Figures
(7)
Tables
(1)