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dc.contributor.authorMattsson, Amanda
dc.contributor.authorJoelsson, Tove
dc.contributor.authorMiettinen, Arttu
dc.contributor.authorKetoja, Jukka A.
dc.contributor.authorPettersson, Gunilla
dc.contributor.authorEngstrand, Per
dc.date.accessioned2021-08-31T05:23:04Z
dc.date.available2021-08-31T05:23:04Z
dc.date.issued2021
dc.identifier.citationMattsson, A., Joelsson, T., Miettinen, A., Ketoja, J. A., Pettersson, G., & Engstrand, P. (2021). Lignin Inter-Diffusion Underlying Improved Mechanical Performance of Hot-Pressed Paper Webs. <i>Polymers</i>, <i>13</i>(15), Article 2485. <a href="https://doi.org/10.3390/polym13152485" target="_blank">https://doi.org/10.3390/polym13152485</a>
dc.identifier.otherCONVID_100323366
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/77608
dc.description.abstractBroader use of bio-based fibres in packaging becomes possible when the mechanical properties of fibre materials exceed those of conventional paperboard. Hot-pressing provides an efficient method to improve both the wet and dry strength of lignin-containing paper webs. Here we study varied pressing conditions for webs formed with thermomechanical pulp (TMP). The results are compared against similar data for a wide range of other fibre types. In addition to standard strength and structural measurements, we characterise the induced structural changes with X-ray microtomography and scanning electron microscopy. The wet strength generally increases monotonously up to a very high pressing temperature of 270 °C. The stronger bonding of wet fibres can be explained by the inter-diffusion of lignin macromolecules with an activation energy around 26 kJ mol−1 after lignin softening. The associated exponential acceleration of diffusion with temperature dominates over other factors such as process dynamics or final material density in setting wet strength. The optimum pressing temperature for dry strength is generally lower, around 200 °C, beyond which hemicellulose degradation begins. By varying the solids content prior to hot-pressing for the TMP sheets, the highest wet strength is achieved for the completely dry web, while no strong correlation was observed for the dry strength.en
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherMDPI AG
dc.relation.ispartofseriesPolymers
dc.rightsCC BY 4.0
dc.subject.otherkuumapuristus
dc.subject.otherhot-pressing
dc.subject.otherpaper web
dc.subject.otherfibre
dc.subject.otherlignin
dc.subject.otherdiffusion
dc.subject.otheractivation energy
dc.titleLignin Inter-Diffusion Underlying Improved Mechanical Performance of Hot-Pressed Paper Webs
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-202108314719
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.type.coarhttp://purl.org/coar/resource_type/c_2df8fbb1
dc.description.reviewstatuspeerReviewed
dc.relation.issn2073-4360
dc.relation.numberinseries15
dc.relation.volume13
dc.type.versionpublishedVersion
dc.rights.copyright© 2021 by the authors. Licensee MDPI, Basel, Switzerland.
dc.rights.accesslevelopenAccessfi
dc.subject.ysomassa- ja paperiteollisuus
dc.subject.ysoligniini
dc.subject.ysopaperi
dc.subject.ysobiotekniikka
dc.subject.ysolämpötila
dc.subject.ysovalmistus
dc.subject.ysodiffuusio (fysikaaliset ilmiöt)
dc.subject.ysoekologisuus
dc.subject.ysobiofysiikka
dc.subject.ysokuidut
dc.subject.ysopakkausmateriaalit
dc.subject.ysovetolujuus
dc.format.contentfulltext
jyx.subject.urihttp://www.yso.fi/onto/yso/p1384
jyx.subject.urihttp://www.yso.fi/onto/yso/p19011
jyx.subject.urihttp://www.yso.fi/onto/yso/p8522
jyx.subject.urihttp://www.yso.fi/onto/yso/p2348
jyx.subject.urihttp://www.yso.fi/onto/yso/p2100
jyx.subject.urihttp://www.yso.fi/onto/yso/p8606
jyx.subject.urihttp://www.yso.fi/onto/yso/p18009
jyx.subject.urihttp://www.yso.fi/onto/yso/p22351
jyx.subject.urihttp://www.yso.fi/onto/yso/p6097
jyx.subject.urihttp://www.yso.fi/onto/yso/p7466
jyx.subject.urihttp://www.yso.fi/onto/yso/p8043
jyx.subject.urihttp://www.yso.fi/onto/yso/p15010
dc.rights.urlhttps://creativecommons.org/licenses/by/4.0/
dc.relation.doi10.3390/polym13152485
jyx.fundinginformationThis research was funded by The Kamprad Family Foundation for Entrepreneurship, Research & Charity (grant number 20180234), The KK foundation, and Kempestiftelserna.
dc.type.okmA1


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