Fig. 14.

SEM images of test specimens made of PETG coated with nFA

and PLA filament coated with nFA

(a) test specimen made of PETG filament coated with nFA: magnification 250×

(b) test specimen made of PLA filament coated with nFA: magnification 250×

▲ point to incorporated nFA particles with a size of 5 μm

c) test specimen made of PETG filament coated with nFA: magnification 500×

d) test specimen made of PLA filament coated with nFA: magnification 500×

▲ point to incorporated nFA particles with a size of

▲ show partially incorporated, agglomerated nFA particles with a size of 5 μm

* indicates a fully incorporated nFA particle with a size of 7.5 μm m

f) test specimen made of PLA filament coated with nFA: magnification 1,000×

▲ point to incorporated nFA particles with a size of 5 μm

g) test specimen made of PETG filament coated with nFA: magnification 2,000×

▲ show partially incorporated, agglomerated nFA particles with a size of 5 μm

* indicates a fully incorporated nFA particle with a size of 7.5 μm m.