title: Fabrication of bacterial cellulose thin films self-assembled from sonochemically prepared nanofibrils and its characterization.
abstract: Bacterial cellulose (BC) film formation could be a critical issue in nanotechnology applications such as biomedical or smart materials products. In this research, purified pretreated BC was subjected to high intensity ultrasound (HIUS) and was investigated for the development of BC films. The morphological, structural and thermal properties of the obtained films were studied by using FE-SEM, AFM, FT-IR, XRD, TGA and DSC characterizations. Results showed that the most favorable purification treatment was the 0.01 M NaOH at 70°C for 2h under continuous stirring. The most suitable ultrasound operating conditions were found to be, 1cm distance of ultrasonic probe from the bottom of the beaker, submerged in cold water bath cooling around 12 ± 2°C. The power (25 W/cm(2)), time (30 min), BC concentration (0.1%w/w), amplitude (20 μm) and frequency (20 kHz) were maintained constant.
authors.affiliation: University of West Hungary, Institute of Wood Based Materials and Technologies, 9400 Sopron, Hungary.
authors.forename: Dimitrios
authors.initials: D
authors.lastname: Tsalagkas
authors.affiliation: Technical University in Zvolen, Faculty of Wood Sciences and Technology, Department of Wood Science, 96053 Zvolen, Slovakia.
authors.forename: Rastislav
authors.initials: R
authors.lastname: Lagaňa
authors.affiliation: University of Ljubljana, Biotechnical Faculty, Department of Wood Science, 1000 Ljubljana, Slovenia.
authors.forename: Ida
authors.initials: I
authors.lastname: Poljanšek
authors.affiliation: University of Ljubljana, Biotechnical Faculty, Department of Wood Science, 1000 Ljubljana, Slovenia.
authors.forename: Primož
authors.initials: P
authors.lastname: Oven
authors.affiliation: University of West Hungary, Institute of Wood Based Materials and Technologies, 9400 Sopron, Hungary. Electronic address: levente.csoka@skk.nyme.hu.
authors.forename: Levente
authors.initials: L
authors.lastname: Csoka
mesh_terms: D001419:Bacteria / Q000737:chemistry*; D002482:Cellulose / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D049329:Nanostructures / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods*; D000069453:Ultrasonic Waves
chemical_list: D002482:Cellulose
keywords: Microbial cellulose; Self-assembled thin films; Temperature; Ultrasonic irradiation