Publication detail

Deconstruction of microfibrillated cellulose into nanocrystalline cellulose rods and mesogenic phase formation in concentrated low-modulus sodium silicate solutions

BERTOLLA, L. DLOUHÝ, I. BARTONÍČKOVÁ, E. TOUŠEK, J. NOVÁČEK, J. MÁCOVÁ, P.

Original Title

Deconstruction of microfibrillated cellulose into nanocrystalline cellulose rods and mesogenic phase formation in concentrated low-modulus sodium silicate solutions

Type

journal article in Web of Science

Language

English

Original Abstract

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] .

Keywords

Microfibrillated cellulose; Cellulose nanocrystal; Sodium silicate

Authors

BERTOLLA, L.; DLOUHÝ, I.; BARTONÍČKOVÁ, E.; TOUŠEK, J.; NOVÁČEK, J.; MÁCOVÁ, P.

Released

1. 5. 2019

Publisher

SPRINGER

Location

DORDRECHT

ISBN

0969-0239

Periodical

CELLULOSE

Year of study

26

Number

7

State

Kingdom of the Netherlands

Pages from

4325

Pages to

4344

Pages count

20

URL

https://link.springer.com/article/10.1007/s10570-019-02364-6

BibTex

@article{BUT162028,
  author="Luca {Bertolla} and Ivo {Dlouhý} and Eva {Bartoníčková} and Jaromír {Toušek} and Jiří {Nováček} and Petra {Mácová}",
  title="Deconstruction of microfibrillated cellulose into nanocrystalline cellulose rods and mesogenic phase formation in concentrated low-modulus sodium silicate solutions",
  journal="CELLULOSE",
  year="2019",
  volume="26",
  number="7",
  pages="4325--4344",
  doi="10.1007/s10570-019-02364-6",
  issn="0969-0239",
  url="https://link.springer.com/article/10.1007/s10570-019-02364-6"
}