Author, as appears in the article.: Gil-Castell, Oscar; Reyes-Contreras, Pablo; Barra, Pabla Andrea; Teixeira Mendonca, Regis; Carrillo-Varela, Isabel; Badia, Jose David; Serra, Angels; Ribes-Greus, Amparo
Department: Química Analítica i Química Orgànica
URV's Author/s: Gil Castell, Òscar / Serra Albet, Maria Angels
Keywords: 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
Abstract: 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.
Thematic Areas: Polymers and plastics Polymer science Odontología General chemistry Farmacia Engenharias ii Ciências biológicas ii Chemistry (miscellaneous) Chemistry (all) Biotecnología Astronomia / física
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: angels.serra@urv.cat
Author identifier: 0000-0003-1387-0358
Record's date: 2024-11-02
Papper version: info:eu-repo/semantics/publishedVersion
Link to the original source: https://www.mdpi.com/2073-4360/14/3/423
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Polymers. 14 (3): 423-
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
Article's DOI: 10.3390/polym14030423
Entity: Universitat Rovira i Virgili
Journal publication year: 2022
Publication Type: Journal Publications