Clustered Single Cellulosic Fiber Dissolution Kinetics and Mechanisms through Optical Microscopy under Limited Dissolving Conditions

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dc.contributor.author Mäkelä, Valtteri
dc.contributor.author Wahlström, Ronny
dc.contributor.author Holopainen-Mantila, Ulla
dc.contributor.author Kilpeläinen, Ilkka
dc.contributor.author King, Alistair W. T.
dc.date.accessioned 2018-11-01T08:59:01Z
dc.date.available 2018-11-01T08:59:01Z
dc.date.issued 2018-05
dc.identifier.citation Mäkelä , V , Wahlström , R , Holopainen-Mantila , U , Kilpeläinen , I & King , A W T 2018 , ' Clustered Single Cellulosic Fiber Dissolution Kinetics and Mechanisms through Optical Microscopy under Limited Dissolving Conditions ' , Biomacromolecules , vol. 19 , no. 5 , pp. 1635-1645 . https://doi.org/10.1021/acs.biomac.7b01797
dc.identifier.other PURE: 107319774
dc.identifier.other PURE UUID: 7cd8158c-cbed-4928-9555-ae7f586a8591
dc.identifier.other WOS: 000432476800026
dc.identifier.other Scopus: 85046992964
dc.identifier.other ORCID: /0000-0003-3142-9259/work/47801932
dc.identifier.uri http://hdl.handle.net/10138/256024
dc.description.abstract Herein, we describe a new method of assessing the kinetics of dissolution of single fibers by dissolution under limited dissolving conditions. The dissolution is followed by optical microscopy under limited dissolving conditions. Videos of the dissolution were processed in Image) to yield kinetics for dissolution, based on the disappearance of pixels associated with intact fibers. Data processing was performed using the Python language, utilizing available scientific libraries. The methods of processing the data include clustering of the single fiber data, identifying clusters associated with different fiber types, producing average dissolution traces and also extraction of practical parameters, such as, time taken to dissolve 25, SO, 75, 95, and 99.5% of the clustered fibers. In addition to these simple parameters, exponential fitting was also performed yielding rate constants for fiber dissolution. Fits for sample and cluster averages were variable, although demonstrating first-order kinetics for dissolution overall. To illustrate this process, two reference pulps (a bleached softwood kraft pulp and a bleached hardwood pre hydrolysis kraft pulp) and their cellulase-treated versions were analyzed. As expected, differences in the kinetics and dissolution mechanisms between these samples were observed. Our initial interpretations are presented, based on the combined mechanistic observations and single fiber dissolution kinetics for these different samples. While the dissolution mechanisms observed were similar to those published previously, the more direct link of mechanistic information with the kinetics improve our understanding of cell wall structure and pre-treatments, toward improved processability. en
dc.format.extent 11
dc.language.iso eng
dc.relation.ispartof Biomacromolecules
dc.rights unspecified
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject 116 Chemical sciences
dc.subject FREE-FLOATING COTTON
dc.subject IONIC LIQUIDS
dc.subject WOOD FIBERS
dc.subject NAOH-WATER
dc.subject SYSTEMS
dc.subject PULPS
dc.title Clustered Single Cellulosic Fiber Dissolution Kinetics and Mechanisms through Optical Microscopy under Limited Dissolving Conditions en
dc.type Article
dc.contributor.organization Department of Chemistry
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1021/acs.biomac.7b01797
dc.relation.issn 1525-7797
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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