| Title |
Upcycling spent coffee grounds and waste PET bottles into electrospun composite nanofiber mats for oil structuring applications |
| ID_Doc |
19283 |
| Authors |
Rubio-Valle, JF; Valencia, C; Sánchez, MC; Martín-Alfonso, JE; Franco, JM |
| Title |
Upcycling spent coffee grounds and waste PET bottles into electrospun composite nanofiber mats for oil structuring applications |
| Year |
2023 |
| Published |
|
| DOI |
10.1016/j.resconrec.2023.107261 |
| 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 mu m) 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 result-ing 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. |
| Author Keywords |
Electrospinning; Lignocellulose; Nanofibers; Oleogels; PET; Rheology; Waste |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:001098633400001 |
| WoS Category |
Engineering, Environmental; Environmental Sciences |
| Research Area |
Engineering; Environmental Sciences & Ecology |
| PDF |
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