RT Journal Article
T1 High-quality cellulosic fibers engineered from cotton–elastane textile waste
A1 Villar Blanco, Lorena
A1 Schlapp-Hackl, Inge
A1 Sanchez Vazquez, Pablo Breogan
A1 Hummel, Michael
K1 3303 Ingeniería y Tecnología Químicas
AB Even small amounts of elastane in cotton−elastane blended textiles can prevent fiber-to-fiber recycling strategies in textile recycling. Herein, the selective separation of elastane from cotton blends was addressed by the aminolytic degradation of the synthetic component. Polar aprotic solvents were tested as elastane solvents, but side reactions impeded aminolysis with some of them. Aminolysis of elastane succeeded under mild conditions using dimethyl sulfoxide in combination with diethylenetriamine and1,5-diazabicyclo[4.3.0]non-5-ene as a cleaving agent and catalyst, respectively. The analysis of the nitrogen content in the recovered cellulose fraction demonstrated that 2 h of reaction at 80 °C reduced the elastane content to values lower than 0.08%. The characterization of the recovered cellulose showed that the applied conditions did not affect the macromolecular properties ofcellulose and maintained a cellulose I crystal structure. Degraded elastane products were recovered through precipitation with water.Finally, the cellulosic component was turned into new fibers by dry-jet wet spinning with excellent tensile properties
PB Biomacromolecules
SN 15257797
YR 2024
FD 2024-02-22
LK http://hdl.handle.net/11093/6547
UL http://hdl.handle.net/11093/6547
LA eng
NO Biomacromolecules, 25(3): 1942–1949 (2024)
NO Universidade de Vigo
DS Investigo
RD 20-sep-2024