Articles producció científica> Química Analítica i Química Orgànica

The Role of Eucalyptus Species on the Structural and Thermal Performance of Cellulose Nanocrystals (CNCs) Isolated by Acid Hydrolysis

  • Dades identificatives

    Identificador: imarina:9243751
    Autors:
    Gil-Castell, OscarReyes-Contreras, PabloBarra, Pabla AndreaTeixeira Mendonca, RegisCarrillo-Varela, IsabelBadia, Jose DavidSerra, AngelsRibes-Greus, Amparo
    Resum:
    Cellulose nanocrystals (CNCs) are attractive materials due to their renewable nature, high surface-to-volume ratio, crystallinity, biodegradability, anisotropic performance, or available hydroxyl groups. However, their source and obtaining pathway determine their subsequent performance. This work evaluates cellulose nanocrystals (CNCs) obtained from four different eucalyptus species by acid hydrolysis, i.e., E. benthamii, E. globulus, E. smithii, and the hybrid En × Eg. During preparation, CNCs incorporated sulphate groups to their structures, which highlighted dissimilar reactivities, as given by the calculated sulphate index (0.21, 0.97, 0.73 and 0.85, respectively). Although the impact of the incorporation of sulphate groups on the crystalline structure was committed, changes in the hydrophilicity and water retention ability or thermal stability were observed. These effects were also corroborated by the apparent activation energy during thermal decomposition obtained through kinetic analysis. Low-sulphated CNCs (E. benthamii) involved hints of a more crystalline structure along with less water retention ability, higher thermal stability, and greater average apparent activation energy (233 kJ·mol−1) during decomposition. Conversely, the high-sulphated species (E. globulus) involved higher reactivity during preparation that endorsed a little greater water retention ability and lower thermal stability, with subsequently less average apparent activation energy (185 kJ·mol−1). The E. smithii (212 kJ·mol−1) and En × Eg (196 kJ·mol−1) showed an intermediate behavior according to their sulphate index.
  • Altres:

    Autor segons l'article: Gil-Castell, Oscar; Reyes-Contreras, Pablo; Barra, Pabla Andrea; Teixeira Mendonca, Regis; Carrillo-Varela, Isabel; Badia, Jose David; Serra, Angels; Ribes-Greus, Amparo
    Departament: Química Analítica i Química Orgànica
    Autor/s de la URV: Gil Castell, Òscar / Serra Albet, Maria Angels
    Paraules clau: Thermal stability Kinetic analysis Eucalyptus Crystallinity Cold caustic extraction Cellulose nanocrystals (cnc) wood thermal stability stability reprocessed polylactide reactivity pretreatment nanowhiskers kinetic analysis eucalyptus degradation decomposition crystallinity
    Resum: Cellulose nanocrystals (CNCs) are attractive materials due to their renewable nature, high surface-to-volume ratio, crystallinity, biodegradability, anisotropic performance, or available hydroxyl groups. However, their source and obtaining pathway determine their subsequent performance. This work evaluates cellulose nanocrystals (CNCs) obtained from four different eucalyptus species by acid hydrolysis, i.e., E. benthamii, E. globulus, E. smithii, and the hybrid En × Eg. During preparation, CNCs incorporated sulphate groups to their structures, which highlighted dissimilar reactivities, as given by the calculated sulphate index (0.21, 0.97, 0.73 and 0.85, respectively). Although the impact of the incorporation of sulphate groups on the crystalline structure was committed, changes in the hydrophilicity and water retention ability or thermal stability were observed. These effects were also corroborated by the apparent activation energy during thermal decomposition obtained through kinetic analysis. Low-sulphated CNCs (E. benthamii) involved hints of a more crystalline structure along with less water retention ability, higher thermal stability, and greater average apparent activation energy (233 kJ·mol−1) during decomposition. Conversely, the high-sulphated species (E. globulus) involved higher reactivity during preparation that endorsed a little greater water retention ability and lower thermal stability, with subsequently less average apparent activation energy (185 kJ·mol−1). The E. smithii (212 kJ·mol−1) and En × Eg (196 kJ·mol−1) showed an intermediate behavior according to their sulphate index.
    Àrees temàtiques: Polymers and plastics Polymer science Odontología General chemistry Farmacia Engenharias ii Ciências biológicas ii Chemistry (miscellaneous) Chemistry (all) Biotecnología Astronomia / física
    Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
    Adreça de correu electrònic de l'autor: angels.serra@urv.cat
    Identificador de l'autor: 0000-0003-1387-0358
    Data d'alta del registre: 2024-11-02
    Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
    Enllaç font original: https://www.mdpi.com/2073-4360/14/3/423
    URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
    Referència a l'article segons font original: Polymers. 14 (3): 423-
    Referència de l'ítem segons les normes APA: Gil-Castell, Oscar; Reyes-Contreras, Pablo; Barra, Pabla Andrea; Teixeira Mendonca, Regis; Carrillo-Varela, Isabel; Badia, Jose David; Serra, Angels; (2022). The Role of Eucalyptus Species on the Structural and Thermal Performance of Cellulose Nanocrystals (CNCs) Isolated by Acid Hydrolysis. Polymers, 14(3), 423-. DOI: 10.3390/polym14030423
    DOI de l'article: 10.3390/polym14030423
    Entitat: Universitat Rovira i Virgili
    Any de publicació de la revista: 2022
    Tipus de publicació: Journal Publications
  • Paraules clau:

    Chemistry (Miscellaneous),Polymer Science,Polymers and Plastics
    Thermal stability
    Kinetic analysis
    Eucalyptus
    Crystallinity
    Cold caustic extraction
    Cellulose nanocrystals (cnc)
    wood
    thermal stability
    stability
    reprocessed polylactide
    reactivity
    pretreatment
    nanowhiskers
    kinetic analysis
    eucalyptus
    degradation
    decomposition
    crystallinity
    Polymers and plastics
    Polymer science
    Odontología
    General chemistry
    Farmacia
    Engenharias ii
    Ciências biológicas ii
    Chemistry (miscellaneous)
    Chemistry (all)
    Biotecnología
    Astronomia / física
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