@article{10272/22051,
year = {2022},
month = {6},
url = {https://hdl.handle.net/10272/22051},
abstract = {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.},
organization = {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.},
publisher = {Elsevier},
title = {Different Kraft lignin sources for electrospun nanostructures production: Influence of chemical structure and composition},
doi = {10.1016/j.ijbiomac.2022.06.121},
author = {García Fuentevilla, Luisa and Rubio Valle, José Fernando and Martín Sampedro, Raquel and Valencia Barragán, Concepción and Eugenio, María Eugenia and Ibarra, David},
}