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Releases of microplastics and chemicals from nonwoven polyester fabric-based polyurethane synthetic leather by photoaging

The Science of The Total Environment 2023 27 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 45 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Yanqi Shi, Yanqi Shi, Yanqi Shi, Zhimin Gong, Yanqi Shi, Yanqi Shi, Yanqi Shi, Yanqi Shi, Zhimin Gong, Yanqi Shi, Yanqi Shi, Yanqi Shi, Yanqi Shi, Yanqi Shi, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Lezhou Zheng, Lezhou Zheng, Yanqi Shi, Zhimin Gong, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Lezhou Zheng, Lezhou Zheng, Wentao Li, Zhimin Gong, Yanqi Shi, Jiahao Wang Zhimin Gong, Jiahao Wang Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Yanqi Shi, Jiahao Wang Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Wentao Li, Lezhou Zheng, Lezhou Zheng, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Zhimin Gong, Yanqi Shi, Lezhou Zheng, Lezhou Zheng, Yanqi Shi, Hexinyue Huang, Hexinyue Huang, Yechao Tian, Yechao Tian, Yechao Tian, Yechao Tian, Yechao Tian, Yechao Tian, Yanqi Shi, Yanqi Shi, Yanqi Shi, Zhimin Gong, Shixiang Gao, Zhimin Gong, Zhimin Gong, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Wentao Li, Wentao Li, Yanqi Shi, Zhimin Gong, Wentao Li, Yanqi Shi, Hexinyue Huang, Yanqi Shi, Zhimin Gong, Yanqi Shi, Zhimin Gong, Zhimin Gong, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Yanqi Shi, Yanqi Shi, Hexinyue Huang, Yanqi Shi, Hexinyue Huang, Yanqi Shi, Zhimin Gong, Yanqi Shi, Shixiang Gao, Shixiang Gao, Wentao Li, Hexinyue Huang, Yanqi Shi, Hexinyue Huang, Hexinyue Huang, Zhimin Gong, Yanqi Shi, Yanqi Shi, Yanqi Shi, Hexinyue Huang, Hexinyue Huang, Jiahao Wang Jiahao Wang Hexinyue Huang, Shixiang Gao, Yanqi Shi, Zhimin Gong, Shixiang Gao, Shixiang Gao, Wentao Li, Wentao Li, Wentao Li, Wentao Li, Shixiang Gao, Shixiang Gao, Zhimin Gong, Shixiang Gao, Shixiang Gao, Shixiang Gao, Shixiang Gao, Zhimin Gong, Wentao Li, Shixiang Gao, Shixiang Gao, Shixiang Gao, Yanqi Shi, Shixiang Gao, Shixiang Gao, Yanqi Shi, Yanqi Shi, Shixiang Gao, Shixiang Gao, Yanqi Shi, Shixiang Gao, Jiahao Wang Shixiang Gao, Shixiang Gao, Jiahao Wang Jiahao Wang

Summary

Researchers compared microplastic fiber release and chemical transformation from polyurethane-coated synthetic leather and uncoated nonwoven PET fabric under UV photoaging, finding that the PU coating reduced fiber release but increased the degree of chemical oxidation. Photoaging of synthetic leather products produces microplastic fibers and chemical breakdown products that enter aquatic environments.

Polymers

PET PU

The nonwoven PET fabrics are chemically, mechanically and thermally treated fiber aggregate without weaving, knitting or braiding, which could be used as a base to make polyurethane (PU) synthetic leather through a series of processing. Our research systematically compared the photoaging behaviors of pure non-woven PET base fabric (NPET-P) and PU synthetic leather (nonwoven PET-base fabrics with PU coating, NPET-U), and their possibilities for microplastic fibers (MPFs) generation and chemical transformation in water. NPET-U was photoaged to a higher oxidation degree with higher O/C ratios and more distinct changes in chemical structures. The amount of MPFs released from NPET-U (1.98 × 10 g/fibers) was significantly lower than that from NPET-P (4.76 × 10 g/fibers) after 360 h light irradiation (p value <0.05) with a slower degradation rate and delayed MPFs release. The lengths and diameters of released MPFs from NPET-U varied within a smaller range than that from NPET-P exposed to UV light irradiation. Natural sunlight aging of fabrics for 365 days was found to be equivalent to approximately 85.3-127.2 h UV aging in the laboratory, which indicated the lab accelerated experiments was extraordinarily intense to simulate natural sunlight aging. Furthermore, abundant calcium and sulfur-contained chemicals were detected in original fabrics and the leachate of 360 h light-aged fabrics using the inductively coupled plasma optical emission spectrometer (ICP-OES). The organic components of the leachate were separated according to their molecular weight with the changes of dissolved organic carbon (DOC), dissolved organic nitrogen (DON), and the UV response over aging time. UV stimulation aggravated the role of plastic polymers as disinfection by-product (DBP) precursors. Nevertheless, although NPET-U could produce more nitrogen-contained chemicals, it had similar formation potentials of nitrogen-containing DBPs as NPET-P. The discussion lucubrated the potential risks of the production of MPFs and chemical release in the leachate with regard to combined plastic pollution.

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