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SEM images of PP/cellulose powder generated from SSSP. (A) cPP control, (B) cPP 10 wt % paper, (C) cPP 10 wt % cardboard, (D) cPP 10 wt % wood, (E) rPP control, (F) rPP 10 wt % paper, (G) rPP 10 wt % cardboard, (H) rPP 10 wt % wood. The scale bar denotes 200 μm. WP = waste paper, CB = cardboard, WF = wood flour.
