Antonio J. F. Carvalho
Journal of Renewable Materials, Vol.2, No.2, pp. 118-122, 2014, DOI:10.7569/JRM.2014.634108
Abstract 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… More >
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