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A method for evaluating and minimizing the mechanical damage of fibers in cellulose production lines, including determining the damage factors associated with elastic modules and the change factors associated with D. Urea.
A method for evaluating and minimizing the mechanical damage of fibers in cellulose production lines, including determining the damage factors associated with elastic modules and the change factors associated with D. Urea.
The invention relates to a method for mechanically and morphologically nanocharacterising fibrous material in a cellulose production line, which makes it possible to assess and minimise mechanical damage to the fibres, thus improving the quality of the end product, which includes the steps of: a) selecting packets of fibres extracted from samples and leaving same in the dryer (1); b) selecting fibres and aligning same parallel with the diamond tip of a nanoindenter (7); c) mounting the fibres in a sample holder (3) in order to apply Spurr low-viscosity epoxy resin; d) drying the impregnated fibres by applying a vacuum; e) drying the fibres dried previously in step d) for a longer time; f) cutting the dry samples covered with resin at the upper end thereof, leaving a truncated surface in order subsequently to make cuts therein; g) mounting the samples having a clean, smooth surface on a plate and carrying same to the nanoindenter (7); h) determining the damage factor associated with the modulus of elasticity and the reason for change associated with the hardness; and i) determining a damage factor and an overall reason for change by adding the results obtained in step h).
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