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dc.contributor.authorPeresin, Maria
dc.contributor.authorHabibi, Youssef
dc.contributor.authorZoppe, Justin Orazio
dc.contributor.authorPawlak, Joel
dc.contributor.authorRojas, Orlando J.
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Ciència i Enginyeria de Materials
dc.date.accessioned2021-01-28T12:20:31Z
dc.date.issued2010-03-08
dc.identifier.citationPeresin, M. [et al.]. Nanofiber composites of polyvinyl alcohol and cellulose nanocrystals: manufacture and characterization. "Biomacromolecules", 8 Març 2010, vol. 11, núm. 3, p. 674-681.
dc.identifier.issn1525-7797
dc.identifier.urihttp://hdl.handle.net/2117/336160
dc.description.abstractCellulose nanocrystals (CN) were used to reinforce nanofibers in composite mats produced via electrospinning of poly(vinyl alcohol) (PVA) with two different concentrations of acetyl groups. Ultrathin cross-sections of the obtained nanocomposites consisted of fibers with maximum diameters of about 290 nm for all the CN loads investigated (from 0 to 15% CN loading). The electrospinning process did not affect the structure of the PVA polymer matrix, but its degree of crystallinity increased significantly together with a slight increase in the corresponding melting temperature. These effects were explained as being the result of alignment and enhanced crystallization of PVA chains within the individual nanofibers that were subjected to high shear stresses during electrospinning. The strong interaction of the PVA matrix with the dispersed CN phase, mainly via hydrogen bonding or bond network, was reduced with the presence of acetyl groups in PVA. Most importantly, the elastic modulus of the nanocomposite mats increased significantly as a consequence of the reinforcing effect of CNs via the percolation network held by hydrogen bonds. However, this organization-driven crystallization was limited as observed by the reduction in the degree of crystallinity of the CN-loaded composite fibers. Finally, efficient stress transfer and strong interactions were demonstrated to occur between the reinforcing CN and the fully hydrolyzed PVA electrospun fibers.
dc.format.extent8 p.
dc.language.isoeng
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 dels materials
dc.subject.lcshNanofibers
dc.subject.lcshNanocrystals
dc.subject.lcshCellulose
dc.subject.lcshPolymers
dc.titleNanofiber composites of polyvinyl alcohol and cellulose nanocrystals: manufacture and characterization
dc.typeArticle
dc.subject.lemacNanofibres
dc.subject.lemacNanocristalls
dc.subject.lemacCel·lulosa
dc.subject.lemacPolímers
dc.identifier.doi10.1021/BM901254N
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttps://pubs.acs.org/doi/10.1021/bm901254n
dc.rights.accessRestricted access - publisher's policy
local.identifier.drac30355430
dc.description.versionPostprint (published version)
dc.date.lift10000-01-01
local.citation.authorPeresin, M.; Habibi, Y.; Zoppe, J.; Pawlak, J.; Rojas, O. J.
local.citation.publicationNameBiomacromolecules
local.citation.volume11
local.citation.number3
local.citation.startingPage674
local.citation.endingPage681


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