Abstract
The general relationship between the stress-strain
behaviour and MFA of fibres is a well-known fact but
little is known about variations within a single fibre or
the effect of refining. Therefore, a simple method to
determine MFA of selected single fibres is required.
Polarimetry with a transmitted light microscope was
applied on earlywood, latewood, and compression wood
fibres from Norway spruce and Scots pine. Both reference
pulps and refined pulps were considered. Hardwood fibres
from eucalyptus pulp that have not yet been investigated
to a larger extent were also measured. The MFA is
determined from the light intensity peak of fibres
between crossed Nichols that are turned gradually within
the specimen plane, perpendicularly to the light beam, by
180° (Fig. 1). For intensity evaluation, the ZEN software
by Zeiss was used providing very small measuring spots.
Thus, fibre wall parts of special interest, e.g. areas
close to damages, could be investigated.
| Original language | English |
|---|---|
| Pages | 56-57 |
| Publication status | Published - 2014 |
| Event | COST Action FP1105 Understanding wood cell wall structure, biopolymer interaction and composition: Implications for current products and new material innovation - Coimbra, Portugal Duration: 8 May 2014 → 9 May 2014 |
Workshop
| Workshop | COST Action FP1105 Understanding wood cell wall structure, biopolymer interaction and composition |
|---|---|
| Country/Territory | Portugal |
| City | Coimbra |
| Period | 8/05/14 → 9/05/14 |
Keywords
- pulp fibres
- microfibril angle
- MFA
- measurement