Abstract
Macroscopic assembly of graphene sheets has renovated the preparation of neat carbonaceous fibers with integrating high performance and superior functionalities, beyond the pyrolysis of conventional polymeric precursors. To date, graphene microfibers by the liquid crystalline wet-spinning method have been established. However, how to reliably prepare continuous neat graphene nanofibers remains unknown. Here, we present the electrospinning of neat graphene nanofibers enabled by modulating colossally extensional flow state of graphene oxide liquid crystals. We use polymer with mega molecular weight as transient additives to realize the colossal extensional flow and electrospinning. The neat graphene nanofibers feature high electronic quality and crystallinity and exhibit high electrical conductivity of 2.02 × 106 S/m that is to be comparable with single crystal graphite whisker. The electrospinning of graphene nanofibers was extended to prepare large-area fabric with high flexibility and superior specific electrical/thermal conductivities. The electrospinning of graphene nanofibers opens the door to nanofibers of rich two-dimensional sheets and the neat graphene nanofibers may grow to be a new species after conventional carbonaceous nanofibers and whiskers in broad functional applications.
Graphic abstract
Electrospinning of neat graphene nanofibers is realized by achieving the colossal extension flow of GO dispersion with the assistance of mega polymer. Neat graphene nanofibers and fabrics show good continuity, high crystallinity, excellent conductivity and thermal conductivity, having great potentials in extensive applications.
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Acknowledgements
Z.P.H, J.Q.W and S.P.L contributed equally to this work. The authors thank the members of staff at SSRF for SAXS characterizations. This work is supported by the National Natural Science Foundation of China (Nos. 52090030, 51973191, 51533008, 51803177 and 51873191), Hundred Talents Program of Zhejiang University (188020*194231701/113), National Key R&D Program of China (No. 2016YFA0200200), Key research and development plan of Zhejiang Province (2018C01049), Fujian Provincial Science and Technology Major Projects (NO. 2018HZ0001-2), the Fundamental Research Funds for the Central Universities (NO. K20200060), Key Laboratory of Novel Adsorption and Separation Materials and Application Technology of Zhejiang Province (512301-I21502), Shandong Provincial Natural Science Foundation (ZR2019YQ19), Project of Shandong Province Higher Educational Science and Technology Program (2019KJA026) and State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University(KF2110).
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Han, Z., Wang, J., Liu, S. et al. Electrospinning of Neat Graphene Nanofibers. Adv. Fiber Mater. 4, 268–279 (2022). https://doi.org/10.1007/s42765-021-00105-8
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DOI: https://doi.org/10.1007/s42765-021-00105-8