![]() ![]() ![]() ![]() 3840x2160px brown tortoise, brown tortoise and blue bird, digital art, animals.1920x1080px green leafed trees, stand of trees during daytime, nature, landscape.2100x1313px waterfalls between trees wallpaper, waterfalls and forests, nature.2048x1357px gray house and trees, gray concrete structure surrounded with trees.2000x1000px green tree frog, green tree frog on top of elephant stag beetle on top of brown log with moss selective focus photography.2084x1080px green leafed tree wallpaper, nature, landscape, moss, forest.1230x768px green leafed trees, green rain forest, nature, landscape, mist.2100x1315px leaves on body of water wallpaper, calm body of water surrounded with brown trees.1920x1080px cherry blossoms tree near waterfall wallpaper, woodland stream illustration.This development enables the circular utilization of polyester resources in the textile industry. Ethylene glycol used for decolorization, glycolysis and polycondensation could be recovered by distillation. The recovered BHET could be polycondensed to produce new polyester materials that have comparable properties to those of PET derived from petroleum-based BHET. A wide range of waste polyester textile samples that were randomly picked from the waste bin and contained a library of additives with different colors were recycled to recover BHET with a yield of up to 89.2%, a purity of up to 99.7% and a whiteness ( L* value) of up to >99.9. ![]() In this study, we establish a new closed-loop strategy to use polyester in the textile industry by developing several techniques, including decolorization of waste textiles, glycolysis of decolorized polyester textiles and purification of the bis(hydroxyethylterephthalate) (BHET) product. The main challenges are the decolorization of the waste polyester textiles and the purification of the glycolysis product monomer. However, the conventional glycolysis strategy that is suitable for the recycling of single PET components is inefficient at recycling polyester waste textiles due to the heterogeneous nature of waste textiles. Abundant and easily accessible waste polyester textiles have high potential for producing new polyethylene terephthalate (PET) materials that could enter the next cycle of textile production. ![]()
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