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Non‐Newtonian Thermosensitive Nanofluid Based on Carbon Dots Functionalized with Ionic Liquids

2020Journal article Open access
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dc.contributor.authorGonçalves, Helena M R
dc.contributor.authorPereira, Rui F. P.
dc.contributor.authorLepleux, Emmanuel
dc.contributor.authorPacheco, Louis
dc.contributor.authorValente, Artur J. M.
dc.contributor.authorDuarte, Abel J.
dc.contributor.authorZea Bermudez, Verónica
dc.date.accessioned2022-01-12T14:07:01Z
dc.date.available2022-01-12T14:07:01Z
dc.date.issued2020
dc.description.abstractNon-Newtonian nanofluids present outstanding features in terms of energy transfer and conductivity with high application in numerous areas. In this work, non-Newtonian nanofluids based on carbon dots (Cdots) functionalized with ionic liquids (ILs) are developed. The nanofluids are produced using a simple, single-step method where the raw materials for the Cdots synthesis are glucose and waste biomass (chitin from crab shells). The use of ILs as both reaction media and functionalization molecules allows for the development of a new class of nanofluids, where the ILs on the Cdots surface represent the base-fluid. Here, the well-known benign IL 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) and a novel home-made IL (1-tosylate-3-methyl-imidazolium triflate) [Tmi][Trif] are used. The nanofluids obtained from both substrates show, apart from high conductivity and viscosity, light absorption, and good wettability, an appealing thermal sensitivity behavior. This thermal sensitivity is preserved even when applied as thin films on glass slides and can be boosted using the surface plasmon resonance effect. The results reported demonstrate that the new Cdots/IL-based nanofluids constitute a versatile and cost-effective route for achieving high-performance thermosensitive non-Newtonian sustainable nanofluids with tremendous potential for the energy coatings sector and heat transfer film systems.pt_PT
dc.description.sponsorshipThis research was funded by National Funds by Foundation for Science and Technology (FCT) and by FEDER funds through POCI-COMPETE 2020-Operational Programme Competitiveness and Internationalization in Axis I—Strengthening Research, Technological Development and Innovation (UID/QUI/00616/2013, UID/QUI/50006/2019, UID/ Multi/00709/2013, UID/QUI/00313/2019, UID/CTM/50025, POCI-01- 0145-FEDER-007491, POCI-01-0145-FEDER-007688, UID/CTM/50025, POCI-01-0145-FEDER-016884, PTDC/CTM-NAN/0956/2014, SAICT/ PAC/0032/2015, POCI-01-0145-FEDER-016422, and NORTE-01-0145- FEDER-030858). R.F.P.P. acknowledges FCT-MCTES for SFRH/ BPD/87759/2012 grant. E. Pereira (FCUP, Porto) is acknowledged for her assistancept_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1002/smll.201907661pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.22/19429
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherWILEY-VCHpt_PT
dc.relation.publisherversionhttps://onlinelibrary.wiley.com/doi/full/10.1002/smll.201907661pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/pt_PT
dc.subjectCarbon dotspt_PT
dc.subjectIonic liquidspt_PT
dc.subjectNanofluidspt_PT
dc.subjectPlasmonic effectpt_PT
dc.subjectSelf-improving ionic conductivitypt_PT
dc.titleNon‐Newtonian Thermosensitive Nanofluid Based on Carbon Dots Functionalized with Ionic Liquidspt_PT
dc.typejournal article
dspace.entity.typePublication
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oaire.citation.issue28pt_PT
oaire.citation.startPage1907661pt_PT
oaire.citation.titleSmallpt_PT
oaire.citation.volume16pt_PT
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person.familyNameGonçalves
person.familyNameDuarte
person.givenNameHelena
person.givenNameAbel J.
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