RT Journal Article
T1 Upcycling spent coffee grounds and waste PET bottles into electrospun composite nanofiber mats for oil structuring applications
A1 Rubio Valle, José Fernando
A1 Valencia Barragán, Concepción
A1 Sánchez Carrillo, María del Carmen
A1 Martín Alfonso, José Enrique
A1 Franco Gómez, José María
K1 Electrospinning
K1 Lignocellulose
K1 Nanofibers
K1 Oleogels
K1 PET
K1 Rheology
K1 Waste
AB Spent coffee grounds (SCG) and post-consumer PET bottles (PETbot) are major waste materials from the food industry. In this work, their use to obtain electrospun composite nanofibers is explored aiming to develop a new route for their upcycling into high added-value oil-based products. Raising the proportion of PETbot increased the average fiber diameter (from 0.36 to 0.89 μm) and enhanced the tensile properties of the mats. Young's modulus and strain-at-break increased from 5.1 to 32.8 MPa and from 13.8 to 39.4 %, respectively, as the SGC:PETbot weight ratio decreased. Dispersions of the mats in castor oil exhibited shear-thinning and gel-like viscoelastic properties which can be tuned through the SCG:PETbot ratio. Friction coefficient values of resulting oleogels tested in a tribological contact ranged from 0.165 to 0.092. SCG and PETbot can be used to obtain electrospun nanofibers with oil structuring capabilities while resulting oleogels are proposed as environmentally-friendly alternatives to semisolid lubricants.
PB Elsevier
SN 0921-3449
SN 1879-0658 (electrónico)
YR 2023
FD 2023
LK https://hdl.handle.net/10272/27980
UL https://hdl.handle.net/10272/27980
LA eng
NO Rubio-Valle, J. F., Valencia, C., Sánchez, M. C., Martín-Alfonso, J. E., & Franco, J. M. (2023). Upcycling spent coffee grounds and waste PET bottles into electrospun composite nanofiber mats for oil structuring applications. Resources, Conservation and Recycling, 199, 107261. https://doi.org/10.1016/j.resconrec.2023.107261
NO This study has been carried out in the framework of the Research Project PID2021-125637OB-I00, funded by MCIN/AEI/10.13039/501100011033 and by “ERDF A way of making Europe”. J.F. Rubio-Valle additionally received a PhD Research Grant PRE2019-090632 from Spain's Ministry of Science and Innovation. All funding is gratefully acknowledged.
DS Repositorio Institucional de la Universidad de Huelva
RD 30 may 2026