@article{10272/27980,
year = {2023},
url = {https://hdl.handle.net/10272/27980},
abstract = {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.},
organization = {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.},
publisher = {Elsevier},
keywords = {Electrospinning},
keywords = {Lignocellulose},
keywords = {Nanofibers},
keywords = {Oleogels},
keywords = {PET},
keywords = {Rheology},
keywords = {Waste},
title = {Upcycling spent coffee grounds and waste PET bottles into electrospun composite nanofiber mats for oil structuring applications},
doi = {10.1016/j.resconrec.2023.107261},
author = {Rubio Valle, José Fernando and Valencia Barragán, Concepción and Sánchez Carrillo, María del Carmen and Martín Alfonso, José Enrique and Franco Gómez, José María},
}