Abstract
Five commercially available cellulose micro/nanofibers
and birch pulp ground to various levels using
supermasscolloider equipment were analyzed using
different characterization methods. Viscosity,
transmittance and microscopy measurements turned out to
provide a basic set for quality assurance. Together they
gave the aspect ratio, degree of fibrillation, fibril
size and the amount of unfibrillated material. Viscosity
was found to be sensitive to high aspect ratio fibrils,
giving an estimate of the amount of thin fibrils. The
transmittance measurement correlated well with the amount
of large particles and the optical microscopy effectively
detected the amount of unfibrillated material. SEM
measurements could be used to analyze the fine structure
of fibrils.
It would be beneficial to classify the different kind of
cellulose fibrils according to their properties with a
consensual agreement. ISO/TR 11360 announced
classification system for nanomaterials but more
comprehensive classification for nanocellulose is needed.
Here we discuss the applicability of the above mentioned
classification and how it relates to different
characterization methods for certain grades (from
nanowhiskers and nanofibres to nano fibrillated materials
with branched or ribbon-like structures). In the future,
commensurable characterization methods are needed in
order to compare results between laboratories worldwide
| Original language | English |
|---|---|
| Publication status | Published - 2011 |
| Event | TAPPI International Conference on Nanotechnology for Renewable Materials 2011 - Washington, United States Duration: 6 Jun 2011 → 8 Jun 2011 |
Conference
| Conference | TAPPI International Conference on Nanotechnology for Renewable Materials 2011 |
|---|---|
| Country/Territory | United States |
| City | Washington |
| Period | 6/06/11 → 8/06/11 |