RT Journal Article
T1 Populus alba L., an Autochthonous Species of Spain: A Source for Cellulose Nanofibers by Chemical Pretreatment
A1 Ibarra, David
A1 Martín Sampedro, Raquel
A1 Wicklein, Bernd
A1 Borrero López, Antonio María
A1 Valencia Barragán, Concepción
A1 Valdehíta, Ana
A1 Navas, José M.
A1 Eugenio, María Eugenia
AB In order to identify new sustainable sources for producing cellulose nanofibers (CNFs),fast-growing poplar (Populus alba L.) wood was evaluated herein. For that purpose, bleached poplarkraft pulp was produced and submitted to TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl radical)mediated oxidation (TEMPO-ox) chemical pretreatment followed by microfluidization. The resultingCNFs were thoroughly characterized, including a rheological study at different pH values. PoplarCNFs showed properties comparable to eucalypt CNFs (reference material for CNFs production),showing high carboxylate content (1048 ± 128 µmol g−1), fibrillation yield (87.3% ± 8.1%), opticaltransmittance (83% at 700 nm) and thermal stability (up to more than 200 ◦C). Regarding the rheological study, whereas pH from 4 to 10 did not produce significant changes in rheological behavior,a reduction of pH down to 1 led to an order-of-magnitude increase on the viscoelastic functions.Therefore, poplar CNF shows potential in the pH-sensitive hydrogels application field. Finally, thepossible ecotoxicity of poplar CNF was assessed. The decrease in cell viability was very low so thatonly concentrations causing a 10% cytotoxicity could be calculated for the assay detecting alterationsin cell metabolism (10 µg mL−1) and plasma membrane integrity (60 µg mL−1)
PB MDPI
SN 2073-4360 (electrónico)
YR 2022
FD 2022
LK http://hdl.handle.net/10272/20942
UL http://hdl.handle.net/10272/20942
LA eng
NO Ibarra, D., Martín-Sampedro, R., Wicklein, B., Borrero-López, A. M., Valencia, C., Valdehíta, A., Navas, J. M., & Eugenio, M. E. (2021). Populus alba L., an Autochthonous Species of Spain: A Source for Cellulose Nanofibers by Chemical Pretreatment. In Polymers (Vol. 14, Issue 1, p. 68). MDPI AG. https://doi.org/10.3390/polym14010068
NO This research was funded by Comunidad de Madrid and MCIU/AEI/FEDER, EU viaProjects SUSTEC-CM S2018/EMT-4348 and RTI2018-096080-B-C22, respectively.Silviculture and Forest Management Department (Forest Research Center, INIA,CSIC) is acknowledged for fast-growing poplar materials
DS Repositorio Institucional de la Universidad de Huelva
RD 13 jul 2026