Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 731-736 |
| Number of pages | 6 |
| Journal | Holzforschung |
| Volume | 63 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2009 |
| MoE publication type | A1 Journal article-refereed |
| Event | 10th EWLP - Stockholm, Sweden Duration: 25 Aug 2008 → 28 Aug 2008 |
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Keywords
- cellobiohydrolase
- cellulase
- fiber fracture
- fiber morphology
- hardwood
- scanning electron microscopy (SEM)
- zero-span strength
Cite this
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Effects of commercial cellobiohydrolase treatment on fiber strength and morphology of bleached hardwood pulp. / Suchy, Miro; Hakala, Terhi; Kangas, Heli; Kontturi, Eero; Tammelin, Tekla; Pursula, Tiina; Vuorinen, Tapani.
In: Holzforschung, Vol. 63, No. 6, 2009, p. 731-736.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Effects of commercial cellobiohydrolase treatment on fiber strength and morphology of bleached hardwood pulp
AU - Suchy, Miro
AU - Hakala, Terhi
AU - Kangas, Heli
AU - Kontturi, Eero
AU - Tammelin, Tekla
AU - Pursula, Tiina
AU - Vuorinen, Tapani
PY - 2009
Y1 - 2009
N2 - Development of fiber strength properties and morphological changes on the surface of bleached hardwood kraft pulp after treatment with commercial cellobiohydrolase (CBH) was evaluated. Tensile and tear indices showed no significant effect of the treatment. The treatment resulted in reduction of wet zero-span strength, while the dry zero-span values increased. The decrease in wet zero-span values was most likely caused by preferential action of CBH on structurally irregular zones in the fiber wall coupled with greater sensitivity of wet zero-span testing towards the localized fiber defects. The fracture zone of the wet zero-span tested samples was imaged by scanning electron microscopy (SEM). Visual observation revealed differences in fiber fracture between treated and control samples. The straighter and cleaner fractures of the treated sample could be attributed to the localized hydrolytic action of CBH. Visual analysis of the treated fiber surface morphology by SEM showed an increase of more visible fiber wall dislocations, particularly on fibers of smaller diameter. The increased presence of the fiber dislocation correlates with the decrease in the wet zero-span values of treated samples.
AB - Development of fiber strength properties and morphological changes on the surface of bleached hardwood kraft pulp after treatment with commercial cellobiohydrolase (CBH) was evaluated. Tensile and tear indices showed no significant effect of the treatment. The treatment resulted in reduction of wet zero-span strength, while the dry zero-span values increased. The decrease in wet zero-span values was most likely caused by preferential action of CBH on structurally irregular zones in the fiber wall coupled with greater sensitivity of wet zero-span testing towards the localized fiber defects. The fracture zone of the wet zero-span tested samples was imaged by scanning electron microscopy (SEM). Visual observation revealed differences in fiber fracture between treated and control samples. The straighter and cleaner fractures of the treated sample could be attributed to the localized hydrolytic action of CBH. Visual analysis of the treated fiber surface morphology by SEM showed an increase of more visible fiber wall dislocations, particularly on fibers of smaller diameter. The increased presence of the fiber dislocation correlates with the decrease in the wet zero-span values of treated samples.
KW - cellobiohydrolase
KW - cellulase
KW - fiber fracture
KW - fiber morphology
KW - hardwood
KW - scanning electron microscopy (SEM)
KW - zero-span strength
UR - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000271661600013&KeyUID=WOS:000271661600013
U2 - 10.1515/HF.2009.104
DO - 10.1515/HF.2009.104
M3 - Article
VL - 63
SP - 731
EP - 736
JO - Holzforschung
JF - Holzforschung
SN - 0018-3830
IS - 6
ER -