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undergraduate thesis
Priprema i stabilnost nanofluida u niskotemperaturnom eutektičkom otapalu
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2021. urn:nbn:hr:149:013791
Povodnik, Dora
University of Zagreb
Faculty of Chemical Engineering and Technology

Institutional repository: Repository of Faculty of Chemical Engineering and Technology University of Zagreb

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Povodnik, D. (2021). Priprema i stabilnost nanofluida u niskotemperaturnom eutektičkom otapalu (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:013791

Povodnik, Dora. "Priprema i stabilnost nanofluida u niskotemperaturnom eutektičkom otapalu." Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2021. https://urn.nsk.hr/urn:nbn:hr:149:013791

Povodnik, Dora. "Priprema i stabilnost nanofluida u niskotemperaturnom eutektičkom otapalu." Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2021. https://urn.nsk.hr/urn:nbn:hr:149:013791

Povodnik, D. (2021). 'Priprema i stabilnost nanofluida u niskotemperaturnom eutektičkom otapalu', Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 20 December 2024, https://urn.nsk.hr/urn:nbn:hr:149:013791

Povodnik D. Priprema i stabilnost nanofluida u niskotemperaturnom eutektičkom otapalu [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2021 [cited 2024 December 20] Available at: https://urn.nsk.hr/urn:nbn:hr:149:013791

D. Povodnik, "Priprema i stabilnost nanofluida u niskotemperaturnom eutektičkom otapalu", Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2021. Available at: https://urn.nsk.hr/urn:nbn:hr:149:013791

Metadata
TitlePriprema i stabilnost nanofluida u niskotemperaturnom eutektičkom otapalu
Title (english)Preparation and stability of nanofluid in deep eutectic solvent
AuthorDora Povodnik
MentorJasna Prlić Kardum (mentor)
Committee memberJasna Prlić Kardum (predsjednik povjerenstva)
Committee memberAleksandra Sander (član povjerenstva)
Committee memberLidija Furač (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2021-07-14, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Abstract
Nanosuspenzije sačinjene od nanočestica raspršenih u eutektičkim otapalima aktualna su tema znanstvenih istraživanja – zbog potencijalne primjene u industrijskoj proizvodnji. Pripremom stabilne nanosuspenzije postiže se povećana toplinska vodljivost što dovodi do smanjenja utrošene energije, a time i do smanjenja utjecaja na okoliš. Za uspješnu primjenu nanosuspenzija u industriji ključna je njihova stabilnost odnosno sprječavanje aglomeracije i sedimentacije kroz duži vremenski period. U ovom radu pripremljena je nanosuspenzija u niskotemperaturnom eutetičkom otapalu te je ispitana njena stabilnost. Nanosuspenzija je pripremljena raspršivanjem 𝐴𝑙2𝑂3 u niskotemperaturnom eutetičkom otapalo pripremljenom od tetrabutilamonijeva bromida i mravlje kiseline u omjeru 1:1. Stabilnost pripremljenog nanofluida ispitana je metodom centrifugiranja, vizualnom metodom, metodom mikroskopiranja, te metodom raspodjele veličine čestica. Kao bitna svojstva nanosuspenzija određena su i toplinska svojstva pripremljenog nanofluida. Također zbog potencijalne primjene nanosuspenzije u procesima kapljevinske ekstrakcije određena su i fizikalno-kemijska svojstva pripremljenog niskotemperaturnog eutektičkog otapala i nanosuspenzije. Korištene metode pokazale su da je pripremljena nanosuspenzija stabilna, a do pojave sedimentacije dolazi nakon 60 dana. Toplinska svojstva nanofluida su se smanjila s vremenom što se također može pripisati agregaciji nanočestica te sedimentaciji.
Abstract (english)
Nanosuspensions composed of nanoparticles dispersed in eutectic solvents are a very current topic of scientific research, due to their cost and environmental friendliness. Nanosuspensions have a great potential for application in industrial production. Due to their increased thermal conductivity there is a reduction in energy consumption, and thus a reduction in environmental impact and reduced production costs. The key to the successful application of nanosuspensions in the industry is their stability, ie the absence of sedimentation or agglomeration over a longer period of time. In this work, a nanofluid in a deep eutectic solvent was prepared and its stability was examined. The nanofluid was prepared by dispersing 𝐴𝑙2𝑂3 in a deep eutetic solvent prepared from tetrabutylammonium bromide and formic acid in a ratio of 1: 1. The stability of the prepared nanofluid was examined by centrifugation, visual method, microscopy method, and particle size distribution method. The thermal properties and physicochemical properties of the prepared nanofluid were also determined as important properties of nanosuspensions. The methods used showed that the prepared nanosuspension is stable, and sedimentation occured after 60 days. The thermal properties of nanofluids have decreased over time, which can be attributed to nanoparticle aggregation and sedimentation.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:013791
Study programmeTitle: Chemical Engineering - Undergraduate study
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
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Created on2023-04-14 07:53:05