Fig. 3: Structure and morphology of (ⁿPBFDO/^cCNFs)^IL films.

Photographs of ^cCNFs^IL film (a) and an (ⁿPBFDO/^cCNFs)^IL film (b), respectively. The 2D-SAXS patterns of a ^cCNFs^IL film (c1) and (ⁿPBFDO/^cCNFs)^IL film (c2). d The 1D-SAXS intensity profiles with fitted curves for ^cCNFs film, ^cCNFs^IL film, and (ⁿPBFDO/^cCNFs)^IL film, respectively. e SEM image of the surface of a ^cCNFs^IL film. f, g Cross-sectional SEM images of the surface of a ^cCNFs^IL film. h SEM image and i, j Cross-sectional SEM images of the surface of an (ⁿPBFDO/^cCNFs)^IL film. k XRD patterns of ^cCNFs film, ^cCNFs^IL film, (ⁿPBFDO/^cCNFs)^IL film, and neat ⁿPBFDO polymer, respectively. l, m Tensile stress-strain curves and corresponding tensile moduli for each of the foregoing samples, respectively. Error bars show (mean values ±) s.d.; n = 3 repeats.