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Scheme and SEM images of LIG on PI (top panel) and LIG/MPU (bottom panel): (a) LIG porous (LIG-P) and (b) LIG fibers (LIG-F) on PI; (c,d) morphology and (e) cross-section of LIG-P/MPU; and (f,g) morphology and (h) cross-section of LIG-F/MPU. All SEM images are top view (sample tilt angle θ = 0), except for (e,h) which are tilted views (θ = 50°).
