Fabrication of bacterial cellulose thin films self-assembled from sonochemically prepared nanofibrils and its characterization.

Autor: Tsalagkas D; University of West Hungary, Institute of Wood Based Materials and Technologies, 9400 Sopron, Hungary., Lagaňa R; Technical University in Zvolen, Faculty of Wood Sciences and Technology, Department of Wood Science, 96053 Zvolen, Slovakia., Poljanšek I; University of Ljubljana, Biotechnical Faculty, Department of Wood Science, 1000 Ljubljana, Slovenia., Oven P; University of Ljubljana, Biotechnical Faculty, Department of Wood Science, 1000 Ljubljana, Slovenia., Csoka L; University of West Hungary, Institute of Wood Based Materials and Technologies, 9400 Sopron, Hungary. Electronic address: levente.csoka@skk.nyme.hu.
Jazyk: angličtina
Zdroj: Ultrasonics sonochemistry [Ultrason Sonochem] 2016 Jan; Vol. 28, pp. 136-143. Date of Electronic Publication: 2015 Jul 14.
DOI: 10.1016/j.ultsonch.2015.07.010
Abstrakt: 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.
(Copyright © 2015 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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