Individually Dispersed Wood-Based Cellulose Nanocrystals
Huibin Chang
Jeffrey Luo
Amir A. Bakhtiary Davijani
An-Ting Chien
Po-Hsiang Wang
H. Clive Liu
Satish Kumar
10.1021/acsami.6b00094.s003
https://acs.figshare.com/articles/media/Individually_Dispersed_Wood_Based_Cellulose_Nanocrystals/2879068
Good
dispersion of cellulose nanocrystals (CNCs) in the polymer
matrix is one of the key factors to obtaining good properties in the
resulting nanocomposites. However, the preparation of individually
dispersed CNCs in solvents or in polymer matrices has been a challenge.
In this study, individually dispersed wood-based CNCs have been successfully
prepared in solvents, including dimethylformamide (DMF), H<sub>2</sub>O, and a mixture of H<sub>2</sub>O/DMF, by sonication of moisture-containing
CNCs. The CNCs dispersions were characterized by dynamic light scattering
(DLS). It is found that CNCs containing above about 3.8 wt % moisture
is critical for achieving individually dispersed CNC in solvents.
Hydrodynamic radius (<i>R</i><sub>h</sub>) of CNCs is smaller
in H<sub>2</sub>O/DMF co-solvent mixture than that in pure DMF or
in pure H<sub>2</sub>O under same sonication treatment conditions.
Experimental results have been corroborated using molecular simulation
study.
2016-02-22 00:00:00
DMF
sonication treatment conditions
solvent
H 2O
DLS
CNC