Article
Oleo-dispersions of electrospun cellulose acetate butyrate nanostructures: toward renewable semisolid lubricants
Author/s | Martín Alfonso, Manuel Antonio
Rubio Valle, José Fernando Martín Alfonso, José Enrique Franco Gómez, José María |
Department | Universidad de Sevilla. Departamento de Física Aplicada II |
Publication Date | 2024 |
Deposit Date | 2024-05-08 |
Published in |
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Abstract | In this work, the electrospinnability of cellulose acetate butyrate (CAb)solutions, and the ability of the resulting micro- and nano-architectures tostructure castor oil are studied aiming to develop eco-friendly ... In this work, the electrospinnability of cellulose acetate butyrate (CAb)solutions, and the ability of the resulting micro- and nano-architectures tostructure castor oil are studied aiming to develop eco-friendly lubricatinggreases. Particles, beaded-fibers, defect-free fibers, and porousnanostructures are successfully prepared by dissolving CAb inN,N-dimethylacetamide/acetone (DMAc:Ac, 1:2 w/w) and methylenechloride/acetone (DM:Ac, 1:1 w/w) solvent mixtures at differentconcentrations (2.5–15 wt.%). The formation of bead-free nanofibers isfavored at concentration above 10 wt.%, when solutions achieve relaxationtimes of≈50 ms and shear-thinning in extensional and shear flow tests,respectively. Non-porous and porous CAb nanostructures are successfullyused as castor oil thickeners at concentrations of 3–5 wt.%, leading a widevariety of rheological responses which mimic those of traditional semisolidlubricants. The surface properties of the nanofibers have a significant impacton the wear and friction performance in metal–metal contact, which has beenassociated with the oil release ability of the generated 3D network.Oleo-dispersions prepared with smooth fibers show tribological performancecomparable to, or even better than, commercial lithium greases. Overall, thisstudy reveals the potential of CAb electrospun nanostructures for thedevelopment of next-generation renewable semisolid lubricant formulations. |
Funding agencies | Ministerio de Ciencia e Innovación (MICIN). España European Commission (EC). Fondo Europeo de Desarrollo Regional (FEDER) Junta de Andalucía |
Project ID. | MCIN/AEI/10.13039/5011000110
ID2021-125637OB-I00 PY20_00751 UHU202029 PRE2019-09063 |
Citation | Martin Alfonso, M.A., Rubio Valle, J.F., Martín Alfonso, J.E. y Franco Gómez, J.M. (2024). Oleo-dispersions of electrospun cellulose acetate butyrate nanostructures: toward renewable semisolid lubricants. Advanced Sustainable Systems, 2024 (2300592). https://doi.org/10.1002/adsu.202300592. |
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