Show simple item record

dc.contributor.authorManich Bou, Albert M.
dc.contributor.authorLis Arias, Manuel José
dc.contributor.authorPerez Renetero, Sonia
dc.contributor.authorAlgaba Joaquín, Inés María
dc.contributor.authorMartí Gelabert, Meritxell
dc.contributor.authorCayuela Marín, Diana
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Química
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Estadística i Investigació Operativa
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Ciència i Enginyeria de Materials
dc.date.accessioned2021-06-30T09:54:59Z
dc.date.available2021-06-30T09:54:59Z
dc.date.issued2021-05-14
dc.identifier.citationManich, A.M. [et al.]. Influence of alkaline delignification on moisture uptake behavior and bonding enthalpies of hemp. "Journal of applied polymer science", 2021, vol. 138, n. 39, e50990.
dc.identifier.issn0021-8995
dc.identifier.urihttp://hdl.handle.net/2117/348134
dc.description.abstractRaw hemp fibers are alkaline delignified to evaluate the effect of lignin on themoisture uptake behavior of hemp. Samples are subjected to moisture absorp-tion/desorption isotherms from 5% to 95% relative humidity at three differenttemperatures (15, 25, and 35 C). The sorption ratio between delignified anduntreated hemp is lowered by 25%. Hysteresis makes evident the greater influ-ence of lignin on moisture binding at low relative humidity while at highrelative humidity, cellulose plays the most important role. The GAB,Hailwood-Horrobin and Dent models are fitted to absorption/desorptionisotherms. Delignification and temperature decrease the size of the monolayer.The energy constants of the monolayer differ according to the model used.Lignin causes great differences between absorption and desorption. The greaterthe temperature is, the lower the monolayer energy constant. The energy con-stants of the multilayer are identical for the three models, showing a greaterrange of variation in delignified samples than in the untreated samples. Basedon primary and secondary energy constants, bonding enthalpies are determined.Estimations in desorption show higher correlation coefficients with the energyconstants, which enables to conclude that measures in desorption better explainthe effect of delignification on the water uptake behavior of hemp
dc.format.extent15 p.
dc.language.isoeng
dc.publisherWiley
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Enginyeria química
dc.subjectÀrees temàtiques de la UPC::Enginyeria dels materials
dc.subject.lcshAdsorption
dc.subject.lcshBiopolymers
dc.subject.lcshPolymers
dc.subject.lcshCellulose
dc.subject.lcshWood products
dc.subject.otherAdsorption
dc.subject.otherBiopolymers and renewable polymers
dc.subject.otherCellulose and other wood products
dc.titleInfluence of alkaline delignification on moisture uptake behavior and bonding enthalpies of hemp
dc.typeArticle
dc.subject.lemacAdsorció
dc.subject.lemacBiopolímers
dc.subject.lemacPolímers
dc.subject.lemacCel·lulosa
dc.subject.lemacFusta
dc.contributor.groupUniversitat Politècnica de Catalunya. POLQUITEX - Materials Polimérics i Química Téxtil
dc.contributor.groupUniversitat Politècnica de Catalunya. TECTEX - Grup de Recerca en Tecnologia Tèxtil
dc.identifier.doi10.1002/app.50990
dc.relation.publisherversionhttps://onlinelibrary.wiley.com/doi/full/10.1002/app.50990
dc.rights.accessOpen Access
local.identifier.drac31867922
dc.description.versionPostprint (published version)
dc.relation.projectidinfo:eu-repo/grantAgreement/MINECO/1PE/MAT2016-79352-R
local.citation.authorManich, A.M.; Lis, M.; Perez-Rentero, S.; Algaba, I.; Martí, M.; Cayuela, D.
local.citation.publicationNameJournal of applied polymer science
local.citation.volume138
local.citation.number39
local.citation.startingPage50990:1
local.citation.startingPage50990:1
local.citation.endingPage50990:15
local.citation.endingPage50990:15


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record

Attribution-NonCommercial-NoDerivs 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 3.0 Spain