Development of Thin Films from Thermomechanical Pulp Nanofibers of Radiata Pine (Pinus radiata D. Don) for Applications in Bio-Based Nanocomposites

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datacite.alternateIdentifier.citationFIBERS,Vol.11,,2023
datacite.alternateIdentifier.doi10.3390/fib11010001
datacite.creatorVergara Figueroa, Judith
datacite.creatorErazo, Oswaldo
datacite.creatorPesenti, Hector
datacite.creatorValenzuela, Paulina
datacite.creatorFernandez Perez, Arturo
datacite.creatorGacitua, William
datacite.date2023
datacite.subject.englishradiata pine thermomechanical pulp
datacite.subject.englishmicro-grinding
datacite.subject.englishcellulose nanofibers with lignin
datacite.subject.englishbio-based nanocomposites
datacite.titleDevelopment of Thin Films from Thermomechanical Pulp Nanofibers of Radiata Pine (Pinus radiata D. Don) for Applications in Bio-Based Nanocomposites
dc.date.accessioned2023-06-08T15:48:05Z
dc.date.available2023-06-08T15:48:05Z
dc.description.abstractThe main objective of this study was to develop cellulose nanofibers from the thermomechanical pulp (TMP) of Radiata Pine (Pinus radiata D. Don), and for this, a one-step micro-grinding process was used. The newly developed material was called thermomechanical pulp nanofibers (TMP-NF). In the first instance, a determination of the constituents of the TMP was carried out through a chemical characterization. Then, TMP-NFs were compared with cellulose nanofibers (CNF) by morphological analysis (Scanning Electron Microscopy, SEM, and Atomic Force Microscopy, AFM), X-ray Diffraction (XRD) and Fourier-Transform Infrared Spectroscopy with Attenuated Total Reflection (FTIR-ATR). In addition, films were developed from TMP-NF and CNF using a vacuum filtration manufacturing method. For this study, 0.10, 0.25, 0.50, and 1.00% dry weight of CNF and TMP-NF were used as continuous matrices without organic solvents. The films were characterized by determining their morphological, physical, surface properties, and mechanical properties. The main results showed that morphological analysis by SEM and AFM for the fractionated sample indicated a fiber diameter distribution in the range of 990-17 nm and an average length of 5.8 mu m. XRD analysis showed a crystallinity index of 90.8% in the CNF, while in the TMP-NF, it was 71.2%, which was foreseeable. FTIR-ATR analysis showed the functional groups of lignin and hemicellulose present in the TMP-NF sample. The films presented apparent porosity values of 33.63 for 1.00% solids content of CNF and 33.27% for 0.25% solids content of TMP-NF. The contact angle was 61.50 degrees for 0.50% solids content of CNF and 84.60 degrees for 1.00% solids content of TMP-NF. Regarding the mechanical properties, the modulus of elasticity was 74.65 MPa for CNF and 36.17 MPa for TMP-NF, and the tensile strength was 1.07 MPa for CNF and 0.69 MPa for TMP-NF. Although the mechanical properties turned out to be higher in the CNF films, the TMP-NF films showed improved surface characteristics as to surface hydrophobic and apparent porosity. In addition, the easy and rapid obtaining of TMP nanofibers makes it a promising material that can be used in biologically based nanocomposites.
dc.identifier.urihttps://repositoriodigital.uct.cl/handle/10925/5185
dc.language.isoen
dc.publisherMDPI
dc.sourceFIBERS
oaire.resourceTypeWOS
oaire.resourceType.enArticle
uct.indizacionESCI
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