RT Journal Article
T1 Different Kraft lignin sources for electrospun nanostructures production: Influence of chemical structure and composition
A1 García Fuentevilla, Luisa
A1 Rubio Valle, José Fernando
A1 Martín Sampedro, Raquel
A1 Valencia Barragán, Concepción
A1 Eugenio, María Eugenia
A1 Ibarra, David
AB This work focuses on the structural features and physicochemical properties of different Kraft lignins and how they can influence the electrospinning process to obtain nanostructures. Structural features of Kraft lignins were characterized by nuclear magnetic resonance, size exclusion chromatography, fourier-transform infrared spectroscopy, and thermal analysis, whereas chemical composition was analyzed by standard method. The addition of cellulose acetate (CA) improves the electrospinning process of Kraft lignins (KL). Thus, solutions of KL/CA at 30 wt% with a KL:CA weight ratio of 70:30 were prepared and then physicochemical and rheologically characterized. The morphology of electrospun nanostructures depends on the intrinsic properties of the solutions and the chemical structure and composition of Kraft lignins. Then, surface tension, electrical conductivity and viscosity of eucalypt/CA and poplar/CA solutions were suitable to obtain electrospun nanostructures based on uniform cross-linked nanofibers with a few beaded fibers. It could be related with the higher purity and higher linear structure, phenolic content and S/G ratios of lignin samples. However, the higher values of electrical conductivity and viscosity of OTP/CA solutions resulted in electrospun nanostructure with micro-sized particles connected by thin fibers, due to a lower purity, S/G ratio and phenolic content and higher branched structure in OTP lignin.
PB Elsevier
SN 0141-8130
SN 1879-0003 (electrónico)
YR 2022
FD 2022-06
LK https://hdl.handle.net/10272/22051
UL https://hdl.handle.net/10272/22051
LA eng
NO García-Fuentevilla, L., Rubio-Valle, J. F., Martín-Sampedro, R., Valencia, C., Eugenio, M. E., & Ibarra, D. (2022). Different Kraft lignin sources for electrospun nanostructures production: Influence of chemical structure and composition. In International Journal of Biological Macromolecules (Vol. 214, pp. 554-567). Elsevier BV. https://doi.org/10.1016/j.ijbiomac.2022.06.121
NO This work is part of two coordinated research projects (RTI2018-096080-B-C21 and RTI2018-096080-B-C22) funded by MCIN/AEI/10.13039/501100011033 and by “ERDF A way of making Europe”. The authors also wish to thank the Comunidad de Madrid and MCIU/AEI/FEDER, EU for funding this study via Projects SUSTEC-CM S2018/EMT-4348. The authors also acknowledge the pre-doctoral grants from José Fernando Rubio Valle (Ref. PRE2019-090632). The contribution of COST Action LignoCOST (CA17128), supported by COST (European Cooperation in Science and Technology), in promoting interaction, exchange of knowledge and collaborations in the field of lignin valorization is gratefully acknowledged.
DS Repositorio Institucional de la Universidad de Huelva
RD 31 may 2026