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SEM of PTFE–PAI–PEO nanofiber with different parameters of spinning solution. (a) hybrid–1, (b) hybrid–2, (c) hybrid–3, (d) hybrid–4, (e) hybrid–5, (b’–e’) PTFE–PAI nanofiber after sintering transferred from b, c, d, e, respectively; (f) hybrid–6, (g) hybrid–7, (h) hybrid–8.
