RT Journal Article
T1 Electrohydrodynamic Processing of PVP-Doped Kraft Lignin Micro- and Nano-Structures and Application of Electrospun Nanofiber Templates to Produce Oleogels
A1 Rubio Valle, José Fernando
A1 Sánchez Carrillo, María Carmen
A1 Valencia Barragán, Concepción
A1 Martín Alfonso, José Enrique
A1 Franco Gómez, José María
AB The present work focuses on the development of lignin micro- and nano-structures obtainedby means of electrohydrodynamic techniques aimed to be potentially applicable as thickening orstructuring agents in vegetable oils. The micro- and nano-structures used were mainly composed ofeucalyptus kraft lignin (EKL), which were doped to some extent with polyvinylpyrrolidone (PVP).EKL/PVP solutions were prepared at different concentrations (10–40 wt.%) and EKL:PVP ratios(95:5–100:0) in N, N-dimethylformamide (DMF) and further physico-chemically and rheologicallycharacterized. Electrosprayed micro-sized particles were obtained from solutions with low EKL/PVPconcentrations (10 and 20 wt.%) and/or high EKL:PVP ratios, whereas beaded nanofiber matswere produced by increasing the solution concentration and/or decreasing EKL:PVP ratio, as aconsequence of improved extensional viscoelastic properties. EKL/PVP electrospun nanofibers wereable to form oleogels by simply dispersing them into castor oil at nanofiber concentrations higherthan 15 wt.%. The rheological properties of these oleogels were assessed by means of small-amplitudeoscillatory shear (SAOS) and viscous flow tests. The values of SAOS functions and viscosity dependedon both the nanofiber concentration and the morphology of nanofiber templates and resemble thoseexhibited by commercial lubricating greases made from traditional metallic soaps and mineral oils
PB MDPI
SN 2073-4360 (electrónico)
YR 2021
FD 2021
LK http://hdl.handle.net/10272/20028
UL http://hdl.handle.net/10272/20028
LA eng
NO Rubio-Valle, J. F., Sánchez, M. C., Valencia, C., Martín-Alfonso, J. E., & Franco, J. M. (2021). Electrohydrodynamic Processing of PVP-Doped Kraft Lignin Micro- and Nano-Structures and Application of Electrospun Nanofiber Templates to Produce Oleogels. Polymers, 13(13), 2206. https://doi.org/10.3390/polym13132206
NO This work is part of a research project (Ref. RTI2018-096080-B-C21) sponsored by theMICINN-FEDER I+D+i Spanish Programme. The authors gratefully acknowledge their financial support. J.F.R.-V. acknowledges receiving the Ph.D. Research Grant PRE2019-090632 fromMICINN (Spain)
DS Repositorio Institucional de la Universidad de Huelva
RD 2 jun 2026