TY  - JOUR
A1  - Pogorelova, Natalia
A1  - Rogachev, Evgeniy
A1  - Akimbekov, Nuraly
A1  - Digel, Ilya
T1  - Effect of dehydration method on the micro- and nanomorphological properties of bacterial cellulose produced by Medusomyces gisevii on different substrates
JF  - Journal of materials science
N2  - Many important properties of bacterial cellulose (BC), such as moisture absorption capacity, elasticity and tensile strength, largely depend on its structure. This paper presents a study on the effect of the drying method on BC films produced by Medusomyces gisevii using two different procedures: room temperature drying (RT, (24 ± 2 °C, humidity 65 ± 1%, dried until a constant weight was reached) and freeze-drying (FD, treated at − 75 °C for 48 h). BC was synthesized using one of two different carbon sources—either glucose or sucrose. Structural differences in the obtained BC films were evaluated using atomic force microscopy (AFM), scanning electron microscopy (SEM), and X-ray diffraction. Macroscopically, the RT samples appeared semi-transparent and smooth, whereas the FD group exhibited an opaque white color and sponge-like structure. SEM examination showed denser packing of fibrils in FD samples while RT-samples displayed smaller average fiber diameter, lower surface roughness and less porosity. AFM confirmed the SEM observations and showed that the FD material exhibited a more branched structure and a higher surface roughness. The samples cultivated in a glucose-containing nutrient medium, generally displayed a straight and ordered shape of fibrils compared to the sucrose-derived BC, characterized by a rougher and wavier structure. The BC films dried under different conditions showed distinctly different crystallinity degrees, whereas the carbon source in the culture medium was found to have a relatively small effect on the BC crystallinity.
Y1  - 2024
U6  - http://dx.doi.org/10.1007/s10853-024-09596-3
SN  - 1573-4803 (Online)
SN  - 0022-2461 (Print)
N1  - Corresponding author: Ilya Digel
VL  - 2024
PB  - Springer Science + Business Media
CY  - Dordrecht
ER  - 
TY  - BOOK
A1  - Staat, Manfred
A1  - Digel, Ilya
A1  - Trzewik, Jürgen
A1  - Sielemann, Stefanie
A1  - Erni, Daniel
A1  - Zylka, Waldemar
T1  - Symposium Proceedings; 4th YRA MedTech Symposium 2024 : February 1 / 2024 / FH Aachen
Y1  - 2024
SN  - 978-3-940402-65-3
U6  - http://dx.doi.org/10.17185/duepublico/81475
PB  - Universität Duisburg-Essen
CY  - Duisburg
ER  -