Abstract
A porous nanofiber web with a hierarchical pore structure was formed by electrospinning and nonsolvent-induced phase separation (NIPS) processes. Phenyl silsesquiazane (PSSQZ) containing 20% high-molecular-weight poly(ethylene oxide) (PEO) was electrospun to form a nanofiber web, where a mixture of high volatility solvent and low volatility nonsolvent induced the pores within the nanofibers through NIPS mechanism. The content of the polymers and the type and ratio of solvent/nonsolvent significantly affected pore formation, and a nanofiber web with a hierarchical pore structure was formed using 90/10 of PSSQZ/PEO, 80/20 of chloroform/decane, and 5 wt% total polymer content. The nanofiber web was then converted to inorganic nanofibers by heat treatment at 700 °C. However, the internal pore structure collapsed due to the low level of cross-linking during the heat treatment, forming hollow inorganic nanofibers.
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This research was supported by the Soongsil University Research Fund.
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Kang, M.G., Kim, I.W., Lee, Y. et al. Fabrication of Porous Phenyl Silsesquiazane and Poly(ethylene oxide) Nanofibers by Electrospinning and Nonsolvent-induced Phase Separation. Fibers Polym 24, 941–946 (2023). https://doi.org/10.1007/s12221-023-00118-7
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DOI: https://doi.org/10.1007/s12221-023-00118-7