RT Journal Article
T1 Bioethanol lignin-rich residue from olive stones for electrospun nanostructures development and castor oil structuring
A1 Rubio Valle, José Fernando
A1 Martín Alfonso, José Enrique
A1 Eugenio, María Eugenia
A1 Ibarra, David
A1 Oliva, José Miguel
A1 Manzanares, Paloma
A1 Valencia Barragán, Concepción
A1 Valencia Barragán, Concepción
K1 Lignin
K1 Olive stones
K1 Cellulose triacetate
K1 Electrospinning
K1 Gel-like dispersion
K1 Rheology
AB This work describes the chemical and structural characterization of a lignin-rich residue from the bioethanol production of olive stones and its use for nanostructures development by electrospinning and castor oil structuring. The olive stones were treated by sequential acid/steam explosion pretreatment, further pre-saccharification using a hydrolytic enzyme, and simultaneous saccharification and fermentation (PSSF). The chemical composition of olive stone lignin-rich residue (OSL) was evaluated by standard analytical methods, showing a high lignin content (81.3 %). Moreover, the structural properties were determined by Fourier-transform infrared spectroscopy, nuclear magnetic resonance, and size exclusion chromatography. OSL showed a predominance of β-β′ resinol, followed by β-O-4′ alkyl aryl ethers and β-5′ phenylcoumaran substructures, high molecular weight, and low S/G ratio. Subsequently, electrospun nanostructures were obtained from solutions containing 20 wt% OSL and cellulose triacetate with variable weight ratios in N, N-Dimethylformamide/Acetone blends and characterized by scanning electron microscopy. Their morphologies were highly dependent on the rheological properties of polymeric solutions. Gel-like dispersions can be obtained by dispersing the electrospun OSL/CT bead nanofibers and uniform nanofiber mats in castor oil. The rheological properties were influenced by the membrane concentration and the OSL:CT weight ratio, as well as the morphology of the electrospun nanostructures.
PB Elsevier
SN 0141-8130
SN 1879-0003 (electrónico)
YR 2023
FD 2023
LK https://hdl.handle.net/10272/28573
UL https://hdl.handle.net/10272/28573
LA eng
NO J.F. Rubio-Valle, J.E. Martín-Alfonso, M.E. Eugenio, et al., Bioethanol lignin-rich residue from olive stones for electrospun nanostructures development and castor oil structuring, International Journal of Biological Macromolecules (2023), https://doi.org/10.1016/j.ijbiomac.2023.128042
NO This work is a collaborative research of different projects: RTI2018- 096080-B-C21, RTI2018-096080-B-C22, PID2021-125637OB-I00, TED2021-132122B-C21 and ENE2017-85819-C2-2-R funded by MCIN/ AEI/10.13039/501100011033 and by “ERDF A way of making Europe”, SUSTEC-CM S2018/EMT-4348 project funded by Comunidad de Madrid. The authors gratefully acknowledge the aforementioned financial support. J.F.R.-V. additionally has received a Ph.D. Research Grant PRE2019-090632 from Spain's Ministry of Science and Innovation. The financial support is gratefully acknowledged.
DS Repositorio Institucional de la Universidad de Huelva
RD 1 jul 2026