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Influence of core-shell composition ratio on morphology and mechanical properties for wet-spun bicomponent cellulose acetate-polyacrylonitrile fibers

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Abstract

Bicomponent cellulose – polyacrylonitrile (PAN) core-shell fibers were produced using coaxial wet spinning. Varying the core-shell composition ratio resulted in changes in the morphology, mechanical and thermal properties of the fibers. When cellulose was the core polymer the fibers had irregular, circular cross-sectional morphology, with the PAN shell containing voids increasing in size from the shell towards the core. When PAN was utilized as the core, fibers showed a spiral core morphology and long, finger-shaped voids extended from the shell surface to the core-shell interface. The mechanical properties of the fibers exhibited double-fracture behavior, increased stiffness, and a reduction in plastic strain. The bicomponent fibers showed two decomposition temperatures, and the first decomposition temperature increased with cellulose acetate content. This work highlights the flexibility in properties that can be obtained via bicomponent wet spinning using polymers that are unable to be melt-processed.

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Acknowledgments

The authors acknowledge the Australian Government for their support through an Australian Government Research Training Program Scholarship and acknowledge that this work was performed in part at the Deakin Hub in the Victorian Node of the Australian National Fabrication Facility (ANFF).

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Funding for the project was provided through an Australian Government Research Training Program Scholarship.

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Authors and Affiliations

  1. Institute for Frontier Materials, Deakin University, Waurn Ponds, Geelong, VIC, 3216, Australia

    Lucas Rosson & Nolene Byrne

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  1. Lucas Rosson
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  2. Nolene Byrne
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Contributions

Conceptualization: Nolene Byrne and Lucas Rosson; Methodology: Nolene Byrne and Lucas Rosson; Formal analysis and investigation: Lucas Rosson; Writing - original draft preparation: Lucas Rosson; Writing - review and editing: Nolene Byrne and Lucas Rosson; Funding acquisition: Nolene Byrne; Resources: Nolene Byrne and Lucas Rosson; Supervision: Nolene Byrne.

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Correspondence to Lucas Rosson.

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Rosson, L., Byrne, N. Influence of core-shell composition ratio on morphology and mechanical properties for wet-spun bicomponent cellulose acetate-polyacrylonitrile fibers. J Polym Res 28, 484 (2021). https://doi.org/10.1007/s10965-021-02828-z

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