Browsing by Department "Deakin University"
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- Cellulose-lignin composite fibres as precursors for carbon fibres. Part 1 – Manufacturing and properties of precursor fibres
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä(2020-09-28) Trogen, Mikaela; Le, Nguyen-Duc; Sawada, Daisuke; Guizani, Chamseddine; Vergara Lourencon, Tainise; Pitkänen, Leena; Sixta, Herbert; Shah, Riddhi; O'Neill, Hugh; Balakshin, Mikhail; Byrne, Nolene; Hummel, MichaelCellulose-lignin composite fibres were spun from ionic liquid (IL) solutions by dry-jet wet spinning. Birch pre-hydrolysed Kraft (PHK) pulp and organosolv beech (BL) or spruce lignin (SL) were dissolved in the IL 1,5-diazabicyclo[4.3.0]non-5-enium acetate ([DBNH]OAc) to prepare spinning dopes. Fibres with lignin concentrations of up to 50% were spun successfully. The fibres were analysed focusing on important properties for the production of carbon fibres (CF). Due to the higher molar mass of the SL compared to the BL, SL showed higher stability in the spinning process, giving higher lignin content in the final fibres. The CF yield after carbonization increased with increasing lignin content. The higher carbon content of SL compared to BL, resulted in moderately higher CF yield of the SL fibres, compared to fibres with BL. Overall, the produced cellulose-lignin composite fibres show great potential as precursors for CF production. - Understanding the influence of key parameters on the stabilisation of cellulose-lignin composite fibres
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä(2021-01) Le, Nguyen Duc; Trogen, Mikaela; Ma, Yibo; Varley, Russell J.; Hummel, Michael; Byrne, NoleneThe high cost of carbon fibre continues to limit its use in industries like automotive, construction and energy. Since the cost is closely linked to the precursor, considerable research has focussed on the use of low-cost alternatives. A promising candidate is a composite fibre consisting of blended cellulose and lignin, which has the added benefit of being derived from sustainable resources. The benefits of blending cellulose and lignin reduce some of the negative aspects of converting single component cellulose and lignin fibres to carbon fibre, although the production from such a blend, remains largely underdeveloped. In this study, the effects of stabilisation temperature and the stabilisation process of the blended fibres are explored. Moreover, the viscoelastic properties of the cellulose-lignin fibre are investigated by DMA for the first time. Finally, the cause of fusion in the stabilisation is adressed and solved by applying a spin finish.