bacterial cellulose mechanical properties 6 chitosan 5 electrospinning 5 graphene oxide 5 lignin 5 poly(lactic acid) 5 3D printing 4 Technology: general issues 4 nanocellulose 4 nanocomposite 4 Research & information: general 3 adsorption 3 biocomposite 3 biopolymers 3 cellulose 3 circular economy 3 films 3 food packaging 3 hydrogel 3 hydrogels 3 ionic liquid 3 nanocomposites 3 natural fibers 3 polyhydroxyalkanoates 3 pyrolysis 3 thermal properties 3 Aspergillus awamori 2 History of engineering & technology 2 PHB 2