Borrego Algarra, MaríaMartín Alfonso, José EnriqueSánchez Carrillo, María CarmenValencia Barragán, ConcepciónFranco Gómez, José María2022-01-192022-01-192021-06-01Borrego, M., MartínAlfonso, J.E., Carmen Sánchez, M., Valencia, C., Franco, J.M.: Electrospun lignin-PVP nanofibers and their ability for structuring oil, International Journal of Biological Macromolecules, Volume 180, 2021, Pages 212-221, ISSN 0141-8130, https://doi.org/10.1016/j.ijbiomac.2021.03.069.0141-8130http://hdl.handle.net/10272/20439This work explores the electrospinnability of low-sulfonate Kraft lignin (LSL)/polyvinylpyrrolidone (PVP) solutions in N,N-dimethylformamide (DMF) and the ability of the different micro- and nano-architectures generated to structure castor oil. LSL/PVP solutionswere prepared at different concentrations (8–15wt%) and LSL:PVP ratios (90:10–0:100) and physico-chemically and rheologically characterized. The morphology of electrospun nanostructures mainly depends on the rheological properties of the solution. Electrosprayed nanoparticles or micro-sized particles connected by thin filamentswere obtained fromsolutionswith lowLSL/PVP concentrations and/or high LSL:PVP ratios,whereas beaded or bead-free nanofibers were produced by increasing concentration and/or decreasing LSL:PVP ratio, due to enhanced extensional viscoelastic properties and non-Newtonian characteristics. Electrospun LSL/PVP nanofibers are able to form oleogels by simply dispersing them into castor oil at concentrations between 10 and 30 wt%. The rheological properties of the oleogels may be tailored bymodifying the LSL:PVP ratio and nanofibers content. The potential application of these oleogels as bio-based lubricants was also explored in a tribological cell. Satisfactory friction and wear results are achieved when using oleogels structured by nanofibers mats with enhanced gel-like properties as lubricants. Overall, electrospinning of lignin/ PVP solutions can be proposed as a simple and effective method to produce nanofibers for oil structuringengAtribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/ElectrospinningLigninOleogelNanofiberOil structuringRheologyjournal article10.1016/j.ijbiomac.2021.03.069open access33 Ciencias Tecnológicas