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