Upcycling of cotton polyester blended textile waste to new man-made cellulose fibers

Simone Haslinger; Michael Hummel; Adina Anghelescu-Hakala; Marjo Määttänen; Herbert Sixta

doi:10.1016/j.wasman.2019.07.040

Upcycling of cotton polyester blended textile waste to new man-made cellulose fibers

Simone Haslinger, Michael Hummel, Adina Anghelescu-Hakala, Marjo Määttänen, Herbert Sixta

Research output: Contribution to journal › Article › Scientific › peer-review

10 Citations (Scopus)

Abstract

The creation of a circular economy for cellulose based textile waste is supported by the development of an upcycling method for cotton polyester blended waste garments. We present a separation procedure for cotton and polyester using [DBNH] [OAc], a superbase based ionic liquid, which allows the selective dissolution of the cellulose component. After the removal of PET, the resulting solution could be employed to dry-jet wet spin textile grade cellulose fibers down to the microfiber range (0.75–2.95 dtex) with breaking tenacities (27–48 cN/tex) and elongations (7–9%) comparable to commercial Lyocell fibers made from high-purity dissolving pulp. The treatment time in [DBNH] [OAc] was found to reduce the tensile properties (<52%) and the molar mass distribution (<51%) of PET under certain processing conditions.

Original language	English
Pages (from-to)	88-96
Number of pages	9
Journal	Waste Management
Volume	97
DOIs	https://doi.org/10.1016/j.wasman.2019.07.040
Publication status	Published - Sep 2019
MoE publication type	A1 Journal article-refereed

Keywords

Cellulose PET separation
Dry-jet wet spinning
Ioncell
Ionic liquid
Polyethylene terephthalate
Textile recycling

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10.1016/j.wasman.2019.07.040

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title = "Upcycling of cotton polyester blended textile waste to new man-made cellulose fibers",

abstract = "The creation of a circular economy for cellulose based textile waste is supported by the development of an upcycling method for cotton polyester blended waste garments. We present a separation procedure for cotton and polyester using [DBNH] [OAc], a superbase based ionic liquid, which allows the selective dissolution of the cellulose component. After the removal of PET, the resulting solution could be employed to dry-jet wet spin textile grade cellulose fibers down to the microfiber range (0.75–2.95 dtex) with breaking tenacities (27–48 cN/tex) and elongations (7–9%) comparable to commercial Lyocell fibers made from high-purity dissolving pulp. The treatment time in [DBNH] [OAc] was found to reduce the tensile properties (<52%) and the molar mass distribution (<51%) of PET under certain processing conditions.",

keywords = "Cellulose PET separation, Dry-jet wet spinning, Ioncell, Ionic liquid, Polyethylene terephthalate, Textile recycling",

author = "Simone Haslinger and Michael Hummel and Adina Anghelescu-Hakala and Marjo M{\"a}{\"a}tt{\"a}nen and Herbert Sixta",

note = "Funding Information: This project has received funding from the European Union{\textquoteright}s Horizon 2020 research and innovation programme under grant agreement No. 646226 . The authors also gratefully acknowledge Dr. Ali Harlin, Dr. Christiane Laine, and Dr. Sari Asikainen (VTT, Finland) for their support in material pretreatment and in the analysis of PET as well as Dr. Zengwei Guo (RISE IVF, Sweden) for his expertise regarding the recyclability of PET. We also thank Hilda Zahra (Aalto University, Finland) for conducting the TGA measurements. Publisher Copyright: {\textcopyright} 2019 The Author(s) Copyright: Copyright 2019 Elsevier B.V., All rights reserved.",

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AU - Määttänen, Marjo

AU - Sixta, Herbert

N1 - Funding Information: This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No. 646226 . The authors also gratefully acknowledge Dr. Ali Harlin, Dr. Christiane Laine, and Dr. Sari Asikainen (VTT, Finland) for their support in material pretreatment and in the analysis of PET as well as Dr. Zengwei Guo (RISE IVF, Sweden) for his expertise regarding the recyclability of PET. We also thank Hilda Zahra (Aalto University, Finland) for conducting the TGA measurements. Publisher Copyright: © 2019 The Author(s) Copyright: Copyright 2019 Elsevier B.V., All rights reserved.

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