Chemical recycling of hemp waste textiles via the ionic liquid based dry-jet-wet spinning technology

dc.cclicenceCC BYen
dc.contributor.authorRissanen, Marja
dc.contributor.authorSchlapp-Hackl, Inge
dc.contributor.authorSawada, Daisuke
dc.contributor.authorRaiskio, Susanna
dc.contributor.authorOjha, Krishna
dc.contributor.authorSmith, Edward
dc.contributor.authorSixta, Herbert
dc.date.acceptance2022-11-17
dc.date.accessioned2023-01-04T10:41:17Z
dc.date.available2023-01-04T10:41:17Z
dc.date.issued2022-12-18
dc.descriptionopen access articleen
dc.description.abstractThe chemical recycling of hemp fabric into high-tenacity man-made cellulose fibres was demonstrated. The fabric was laundered 25 and 50 times to mimic the wear cycles of post-consumer textile waste. Despite the launderings, the molar mass of the material was still too high for recycling via dry-jet-wet spinning. Thus, the fabrics were treated with an aqueous sulfuric acid solution to adjust the intrinsic viscosity to the targeted level of 400–500 ml/g. The acid hydrolysed sample was dissolved in 1,5-diazabicyclo[4.3.0]non-5-enium acetate and man-made cellulose fibres were regenerated by dry-jet-wet spinning. The properties of hemp and regenerated fibres were determined by tensile testing, birefringence measurements, and X-ray diffraction. Regenerated fibres were spun into yarn and knitted into a fabric. The tensile properties of the yarn and the abrasion and pilling resistance of the fabric were determined. Regenerated fibres showed a higher modulus of toughness (55.9 MPa) compared with hemp fibres (28.7 MPa). The fineness and staple length uniformity of regenerated fibres resulted in a high yarn structure evenness, a yarn tenacity of 28.1 cN/tex, and an elongation at break of 7.5%. Due to the even fabric structure, the fabric from regenerated fibres showed higher abrasion resistance than the hemp fabric.en
dc.funderOther external funder (please detail below)en
dc.funder.otherStrategic Research Council of the Academy of Finlanden
dc.identifier.citationRissanen, M., Schlapp-Hackl, I., Sawada, D., Raiskio, S., Ojha, K., Smith, E., Sixta, H. (2022) Chemical recycling of hemp waste textiles via the ionic liquid based dry-jet-wet spinning technology. Textile Research Journal,en
dc.identifier.doihttps://doi.org/10.1177/00405175221143744
dc.identifier.urihttps://hdl.handle.net/2086/22399
dc.language.isoenen
dc.peerreviewedYesen
dc.projectidgrant agreement no. 327296 – the FINIX projecten
dc.publisherSageen
dc.titleChemical recycling of hemp waste textiles via the ionic liquid based dry-jet-wet spinning technologyen
dc.typeArticleen

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