TY  - EJOU
AU  - Carvalho, Antonio J. F. 

TI  - Nanocelluloses from Eucalyptus Wood Pulp:  A Morphological Comparison
T2  - Journal of Renewable Materials

PY  - 2014
VL  - 2
IS  - 2
SN  - 2164-6341

AB  - Two nanocelluloses from eucalyptus, namely microfi brillated cellulose (MFC) and cellulose nanocrystals 
(CNC), were prepared and compared by transmission electron microscopy (TEM). The MFC fi bers are 20–30 
nm wide and are composed of very homogeneous bundles of aligned regular elementary fi brils of 3–5 nm 
diameter. They show long straight portions and short fl exible zones, attributed to crystalline and amorphous 
zones, respectively. The needle-shaped CNC was approximately 200 nm long and 10 nm wide in the wider 
portion. A model for the MFC structure, whose fl exible zones are formed by alignment of the amorphous 
portion of the elementary fi brils, has been proposed. This study throws new light on the ultrastructure of 
cellulose microfi brils, which is not completely known.
KW  - Cellulose
KW  -  microfi brillated cellulose
KW  -  cellulose nanocrystals
KW  -  nanocelluloses

DO  - 10.7569/JRM.2014.634108