Figure 5

(a) Water contact angles of PVDF, PVDF/GO, PVDF/GO/EBC, PVDF/GO/BBC, PVDF/GO/OBC, PVDF/GO@PVA, PVDF/GO/EBC@PVA, PVDF/GO/BBC@PVA and PVDF/GO/OBC@PVA nanofibers at 10 s and (b) FT-IR spectra of PVDF/GO, PVDF/GO/EBC, PVDF/GO/BBC, PVDF/GO/OBC and (c) FT-IR spectra of PVDF/GO@PVA, PVDF/GO/EBC@PVA, PVDF/GO/BBC@PVA and PVDF/GO/OBC@PVA nanofibers.