| ELSAYAD, Kareem, Georg URSTOGER, Caterina CZIBULA, Christian TEICHERT, Jaromír GUMULEC, Jan BALVAN, Michael POHLT and Ulrich HIRN. Mechanical Properties of cellulose fibers measured by Brillouin spectroscopy. Cellulose. DORDRECHT: SPRINGER, 2020, vol. 27, No 8, p. 4209-4220. ISSN 0969-0239. Available from: https://dx.doi.org/10.1007/s10570-020-03075-z. |
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@article{1653776,
author = {Elsayad, Kareem and Urstoger, Georg and Czibula, Caterina and Teichert, Christian and Gumulec, Jaromír and Balvan, Jan and Pohlt, Michael and Hirn, Ulrich},
article_location = {DORDRECHT},
article_number = {8},
doi = {http://dx.doi.org/10.1007/s10570-020-03075-z},
keywords = {Storage modulus; Young's modulus; Loss modulus; Brillouin spectroscopy; Viscoelasticity; Cellulose fiber},
language = {eng},
issn = {0969-0239},
journal = {Cellulose},
title = {Mechanical Properties of cellulose fibers measured by Brillouin spectroscopy},
url = {https://link.springer.com/content/pdf/10.1007/s10570-020-03075-z.pdf},
volume = {27},
year = {2020}
}
TY - JOUR
ID - 1653776
AU - Elsayad, Kareem - Urstoger, Georg - Czibula, Caterina - Teichert, Christian - Gumulec, Jaromír - Balvan, Jan - Pohlt, Michael - Hirn, Ulrich
PY - 2020
TI - Mechanical Properties of cellulose fibers measured by Brillouin spectroscopy
JF - Cellulose
VL - 27
IS - 8
SP - 4209-4220
EP - 4209-4220
PB - SPRINGER
SN - 09690239
KW - Storage modulus
KW - Young's modulus
KW - Loss modulus
KW - Brillouin spectroscopy
KW - Viscoelasticity
KW - Cellulose fiber
UR - https://link.springer.com/content/pdf/10.1007/s10570-020-03075-z.pdf
L2 - https://link.springer.com/content/pdf/10.1007/s10570-020-03075-z.pdf
N2 - We investigate the potential of Brillouin Light Scattering (BLS) Microspectroscopy for fast non-invasive all-optical assessment of the mechanical properties of viscose fibers and bleached softwood pulp. Using an optimized Brillouin spectrometer, we demonstrate fast spatial mapping of the complex longitudinal modulus over extended areas (> 100 mu m). Our results reveal that while the softwood pulp has a relatively uniform moduli, the viscous fibers have significant spatial heterogeneous in the moduli. Specifically, the viscose fibers exhibited a regular pattern of increasing and decreasing modulus normal to the fiber axis. The potential influence of a locally changing refractive index is investigated by holographic phase microscopy and ruled out. We discuss our results in light of the anisotropic mechanical properties of the fibers and are able to estimate the relative difference between the modulus along the fiber axis and that perpendicular to it. Results are presented alongside reference measurements of the quasi-static mechanical properties transverse to the fiber axes obtained using AFM-nanoindentation which reveal a similar trend, hinting at the potential usefulness of BLS for mechanical characterization applications. However, more detailed investigations are called for to uncover all the factors influencing the measured high-frequency BLS modulus and its significance in relation to physical properties of the fiber that may be of practical interest.
ER -
ELSAYAD, Kareem, Georg URSTOGER, Caterina CZIBULA, Christian TEICHERT, Jaromír GUMULEC, Jan BALVAN, Michael POHLT and Ulrich HIRN. Mechanical Properties of cellulose fibers measured by Brillouin spectroscopy. \textit{Cellulose}. DORDRECHT: SPRINGER, 2020, vol.~27, No~8, p.~4209-4220. ISSN~0969-0239. Available from: https://dx.doi.org/10.1007/s10570-020-03075-z.
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