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dc.contributor.authorGarcía Ubasart, Jordi
dc.contributor.authorVidal Lluciá, Teresa
dc.contributor.authorTorres López, Antonio Luis
dc.contributor.authorRojas, Orlando J.
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Tèxtil i Paperera
dc.date.accessioned2013-07-23T12:13:35Z
dc.date.created2013-04-09
dc.date.issued2013-04-09
dc.identifier.citationGarcia-Ubasart, J. [et al.]. Laccase-mediated coupling of nonpolar chains for the hydrophobization of lignocellulose. "Biomacromolecules", 09 Abril 2013, vol. 14, núm. 5, p. 1637-1644.
dc.identifier.issn1525-7797
dc.identifier.urihttp://hdl.handle.net/2117/19983
dc.description.abstractWe investigate the use of laccase enzymes to couple short nonpolar chains containing aromatic groups onto flax fibers and nanofibrillated cellulose (NFC) with different lignin contents. Trametes villosa, Pycnoporus cinnabarinus, and Myceliophthora thermophila were used to facilitate surface coupling and to produce materials with different levels of hydrophobicity. Heat treatment of fiber webs after lacccase-mediated coupling markedly increased the resistance to water absorption. The highest hydrophobization levels of flax fibers was achieved by coupling dodecyl 3,4,5-trihydroxybenzoate (HB-C12), which yielded water contact angles (WCAs) of 80−96 degrees and water absorption times (drop tests) of ca. 73 min. The results from apparent aromatic content and FTIR analyses confirmed the laccase-mediated coupling of HB-C12 onto the cellulose fibers. Ultrathin films of NFC were also used as substrates for enzyme-mediated hydrophobization with HBC12. In these cases, WCAs in the range of 87−104 degrees were achieved, depending on the conditions. Quartz crystal microgravimetry (QCM) was used to study the dynamics and the extent of the coupling process onto cellulose. The results help to better understand the mechanisms involved in laccase-mediated hydrophobization and provide a proof of a biotechnological platform for the development of value-added fiber products
dc.format.extent8 p.
dc.language.isoeng
dc.subjectÀrees temàtiques de la UPC::Enginyeria paperera::Primeres matèries papereres::Cel·lulosa
dc.subjectÀrees temàtiques de la UPC::Enginyeria paperera::Primeres matèries papereres::Fibres papereres
dc.subject.lcshCellulose
dc.subject.lcshLignocellulose
dc.subject.otherEnzymes
dc.subject.otherAromatic compounds
dc.subject.otherCellulose
dc.subject.otherContact angle
dc.subject.otherFibers
dc.subject.otherFlax
dc.subject.otherLignin
dc.subject.otherLinen
dc.subject.otherQuartz crystal microbalances
dc.subject.otherUltrathin films
dc.subject.otherYarn
dc.titleLaccase-mediated coupling of nonpolar chains for the hydrophobization of lignocellulose
dc.typeArticle
dc.subject.lemacPaper -- Química
dc.subject.lemacFibres de cel·lulosa
dc.contributor.groupUniversitat Politècnica de Catalunya. CIPAGRAF - Grup de Recerca Paperer i Gràfic
dc.identifier.doi10.1021/bm400291s
dc.rights.accessRestricted access - publisher's policy
local.identifier.drac12658898
dc.description.versionPostprint (published version)
dc.date.lift10000-01-01
local.citation.authorGarcia-Ubasart, J.; Vidal, T.; Torres, A.L.; Rojas, O. J.
local.citation.publicationNameBiomacromolecules
local.citation.volume14
local.citation.number5
local.citation.startingPage1637
local.citation.endingPage1644


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