Indeed, compressed samples,which have a rather low porosity, absorb around 3wt%
(Fig. 4a) of water. This amount of water uptake is in the range of values
found for biocomposites with similar amounts of plant fibres when
using PLA or PHA as the polymermatrix [29, 30]. Increasing the printing
width from100 to 300%multiplies the water uptake by a factor of 5–10
compared with the compressed samples. Only a slight difference (a few
%) can be observed between samples printed at 0 and at 90°