6533b7d7fe1ef96bd1268ef4

RESEARCH PRODUCT

Characterisation of films and nanopaper obtained from cellulose synthesised by acetic acid bacteria

Maija RuklishaMadara SakaLaura VikeleMarite SkutePavels SemjonovsLongina PaegleLinda RozenbergaInese SableLubova Belkova

subject

PaperPolymers and PlasticsNanofibersFructose02 engineering and technology010402 general chemistry01 natural sciencesAcetobacteraceaechemistry.chemical_compoundCrystallinityX-Ray DiffractionSpectroscopy Fourier Transform InfraredPolymer chemistryMaterials ChemistryZeta potentialFourier transform infrared spectroscopyCelluloseCelluloseAcetic acid bacteriabiologyOrganic Chemistry021001 nanoscience & nanotechnologybiology.organism_classification0104 chemical sciencesGlucosechemistryBacterial celluloseNanofiberAcetobacteraceae0210 nano-technologyNuclear chemistry

description

Bacterial cellulose (BC) samples were obtained using two culture media (glucose and glucose+fructose) and two bacteria (Komagataeibacter rhaeticus and Komagataeibacter hansenii). Nanopaper was obtained from the BC through oxidation and both were studied to determine the impact of culture media and bacteria strain on nanofiber structure and mechanical properties. AFM and SEM were used to investigate fibre dimensions and network morphology; FTIR and XRD to determine cellulose purity and crystallinity; carboxyl content, degree of polymerisation and zeta potential were used to characterise nanofibers. Tensile testing showed that nanopaper has up to 24 times higher Young's modulus (7.39GPa) than BC (0.3GPa). BC displayed high water retention values (86-95%) and a degree of polymerisation up to 2540. Nanofibers obtained were 80-120nm wide and 600-1200nm long with up to 15% higher crystallinity than the original BC. It was concluded that BC is an excellent source for easily obtainable, highly crystalline and strong nanofibers.

yearjournalcountryeditionlanguage
2016-06-01Carbohydrate Polymers
https://doi.org/10.1016/j.carbpol.2016.02.025