| BERTOLLA, L., I. DLOUHY, E. BARTONICKOVA, Jaromír TOUŠEK, Jiří NOVÁČEK a P. MACOVA. Deconstruction of microfibrillated cellulose into nanocrystalline cellulose rods and mesogenic phase formation in concentrated low-modulus sodium silicate solutions. Cellulose. DORDRECHT: SPRINGER, 2019, roč. 26, č. 7, s. 4325-4344. ISSN 0969-0239. Dostupné z: https://dx.doi.org/10.1007/s10570-019-02364-6. |
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@article{1636926,
author = {Bertolla, L. and Dlouhy, I. and Bartonickova, E. and Toušek, Jaromír and Nováček, Jiří and Macova, P.},
article_location = {DORDRECHT},
article_number = {7},
doi = {http://dx.doi.org/10.1007/s10570-019-02364-6},
keywords = {Microfibrillated cellulose; Cellulose nanocrystal; Sodium silicate},
language = {eng},
issn = {0969-0239},
journal = {Cellulose},
title = {Deconstruction of microfibrillated cellulose into nanocrystalline cellulose rods and mesogenic phase formation in concentrated low-modulus sodium silicate solutions},
url = {http://dx.doi.org/10.1007/s10570-019-02364-6},
volume = {26},
year = {2019}
}
TY - JOUR
ID - 1636926
AU - Bertolla, L. - Dlouhy, I. - Bartonickova, E. - Toušek, Jaromír - Nováček, Jiří - Macova, P.
PY - 2019
TI - Deconstruction of microfibrillated cellulose into nanocrystalline cellulose rods and mesogenic phase formation in concentrated low-modulus sodium silicate solutions
JF - Cellulose
VL - 26
IS - 7
SP - 4325-4344
EP - 4325-4344
PB - SPRINGER
SN - 09690239
KW - Microfibrillated cellulose
KW - Cellulose nanocrystal
KW - Sodium silicate
UR - http://dx.doi.org/10.1007/s10570-019-02364-6
L2 - http://dx.doi.org/10.1007/s10570-019-02364-6
N2 - This work demonstrates for the first time the deconstruction of microfibrillated cellulose (MFC) into rod-like cellulose nanocrystals (CNCs) in concentrated low modulus sodium silicate solutions. To this aim, MFC suspensions at different concentrations were first treated in sodium hydroxide solutions and then amorphous silica powder was added. Optical microscopy and transmission electron microscopy observation showed how MFC was efficiently deconstructed into CNCs, evidencing the occurrence of a phase separation into an isotropic and mesogenic phase. The extracted CNCs were characterized by a remarkably higher length (600-1200nm) in comparison with the plant-derived ones commonly reported in literature. FT-IR spectroscopy and Si-29 MAS NMR confirmed that the Q(n) equilibrium of the suspended silicate species was affected, proportionally to the amount of MFC. It was also shown, that due to the excluded volume effect exerted by silicate anions, nematic or smectic ordering could be achieved for CNC concentrations far below the critical rod concentration predicted by the Doi-Edwards model. [GRAPHICS] .
ER -
BERTOLLA, L., I. DLOUHY, E. BARTONICKOVA, Jaromír TOUŠEK, Jiří NOVÁČEK a P. MACOVA. Deconstruction of microfibrillated cellulose into nanocrystalline cellulose rods and mesogenic phase formation in concentrated low-modulus sodium silicate solutions. \textit{Cellulose}. DORDRECHT: SPRINGER, 2019, roč.~26, č.~7, s.~4325-4344. ISSN~0969-0239. Dostupné z: https://dx.doi.org/10.1007/s10570-019-02364-6.
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