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Electric field-assisted wet spinning to fabricate strong, tough, and continuous nanocellulose long fibers

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Abstract

Continuous fabrication of nanocellulose long fibers (NCLFs) under an alternating current (AC) electric field was conducted by wet spinning cellulose nanofibers (CNF) suspension by adopting an environment-friendly coagulant. The alignment of CNFs in NCLFs under three different AC voltages was investigated at a constant spinning speed and an optimal electric field frequency. Upon application of AC voltage during the wet spinning process, Young’s modulus, tensile strength, yield strength, strain-at-break, and toughness of the NCLFs improved dramatically with increasing the applied AC voltage. The fabricated NCLFs at the AC voltage of 900 V exhibited remarkable mechanical properties: Young’s modulus of 28 GPa (48% increase), tensile strength of 395 MPa (33% increase), and toughness of 15 MJ/m3 (49% increase) in comparison to the no-electric field case. The CNF orientation increased with the applied electric voltage increase, as did their dense packing. The NCLFs fabricated using the proposed method are promising for fabricating strong and tough NCLF-reinforced polymer composites.

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Acknowledgments

National Research Foundation of Korea supported this research through the Creative Research Initiatives Program (NRF-2015R1A3A2066301).

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Conceptualization, JK and PSP; Data curation and experiments, PSP and HCK; Writing—original draft preparation, PSP; Visualization, DOA, and RMM; Writing— review and editing, JK and HCK; Supervision, JK. All authors have approved the final version of the manuscript.

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Correspondence to Jaehwan Kim.

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Panicker, P.S., Kim, H.C., Agumba, D.O. et al. Electric field-assisted wet spinning to fabricate strong, tough, and continuous nanocellulose long fibers. Cellulose 29, 3499–3511 (2022). https://doi.org/10.1007/s10570-022-04492-y

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  • DOI: https://doi.org/10.1007/s10570-022-04492-y

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