Cellulose (2017) 24:1759–1773
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Fig. 3 SEM images (magnification: 9 100 or 9 500) of the fracture site of composites made from CNF ( top , left 9 100, right : 9 500), CNF/GGM ( centre left 9 500), CNF/OGG-50
( centre right 9 500), CNF/OGG-80 ( bottom left 9 500) andBC ( bottom right 9 500) nanopapers
the tensile strength was average. Other groups reported much higher values (Ansari et al. 2014; Henriksson et al. 2008; Sehaqui et al. 2010; Zhou et al. 2009), but since these have been obtained for thin
nanopapers of chemically pre-treated CNF, they are not fully comparable to the results presented here. The nanopaper properties determine the properties of the final nanopaper based multi-layer composites,
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