Autor(es): Schlapp-Hackl, Inge ; Nygren, Nicole ; Heimala, Senni ; Leinonen, Anna ; Dourado, Fernando ; Gama, F. M. ; Hummel, Michael ; Silva, Francisco A.G.S.
Data: 2024
Identificador Persistente: https://hdl.handle.net/1822/91913
Origem: RepositóriUM - Universidade do Minho
Assunto(s): Bacterial cellulose; Ionic liquid; Lyocell spinning; Man-made cellulose fibres; Mechanical properties; Viscose recycling
Currently the textile industry relies strongly on synthetic fibres and cotton, which contribute to many environmental problems. Man-made cellulosic fibres (MMCF) can offer sustainable alternatives. Herein, the development of Lyocell-type MMCF using bacterial cellulose (BC) as alternative raw material in the Ioncell® spinning process was investigated. BC, known for its high degree of polymerization (DP), crystallinity and strength was successfully dissolved in the ionic liquid (IL) 1,5-diazabicyclo[4.3.0]non-5-enium acetate [DBNH][OAc] to produce solutions with excellent spinnability. BC staple fibres displayed good mechanical properties and crystallinity (CI) and were spun into a yarn which was knitted into garments, demonstrating the potential of BC as suitable cellulose source for textile production. BC is also a valuable additive when recycling waste cellulose textiles (viscose fibres). The high DP and Cl of BC enhanced the spinnability in a viscose/BC blend, consequently improving the mechanical performance of the resulting fibres, as compared to neat viscose fibres.
