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undergraduate thesis
Utjecaj magnetskog polja na površinsku napetost nekih tekućina
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2017. urn:nbn:hr:149:868160
Kisić, Lucija
University of Zagreb
Faculty of Chemical Engineering and Technology

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

Cite this document

Kisić, L. (2017). Utjecaj magnetskog polja na površinsku napetost nekih tekućina (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:868160

Kisić, Lucija. "Utjecaj magnetskog polja na površinsku napetost nekih tekućina." Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2017. https://urn.nsk.hr/urn:nbn:hr:149:868160

Kisić, Lucija. "Utjecaj magnetskog polja na površinsku napetost nekih tekućina." Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2017. https://urn.nsk.hr/urn:nbn:hr:149:868160

Kisić, L. (2017). 'Utjecaj magnetskog polja na površinsku napetost nekih tekućina', Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 23 November 2024, https://urn.nsk.hr/urn:nbn:hr:149:868160

Kisić L. Utjecaj magnetskog polja na površinsku napetost nekih tekućina [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2017 [cited 2024 November 23] Available at: https://urn.nsk.hr/urn:nbn:hr:149:868160

L. Kisić, "Utjecaj magnetskog polja na površinsku napetost nekih tekućina", Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2017. Available at: https://urn.nsk.hr/urn:nbn:hr:149:868160

Metadata
TitleUtjecaj magnetskog polja na površinsku napetost nekih tekućina
Title (english)Influence of magnetic field on surface tension of some liquids
AuthorLucija Kisić
MentorVladimir Dananić (mentor)
Committee memberVladimir Dananić (predsjednik povjerenstva)
Committee memberZoran Mandić (član povjerenstva)
Committee memberAnte Jukić (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2017-09-20, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Physics
General and Classical Physics
Abstract
Površinska napetost je fizikalna veličina koja opisuje svojstvo površine tekućine zbog kojega se ploština (površina) slobodne površine tekućine smanjuje. Uzrok je površinske napetosti asimetrični raspored među molekularnih sila na granici faza. Kako bi vidjeli kako magnetsko polje utječe na površinsku napetost zadanih tekućina, radi se niz mjerenja, da bi se rezultati mogli usporediti. U istraživanju smo koristili dvije polarne tekućine, redestiliranu vodu i formamid i jednu nepolarnu tekućinu, dijodometan. Ispitivane tekućine nanose se na uzorke aluminija, bakra, željeza i teflona i pomoću goniometra se dobivaju vrijednosti kontaktnog kuta. Ista mjerenja se ponavljaju u prisustvu magneta. Na temelju dobivenih rezultata kontaktnog kuta, promatraju se interakcije između hidrofilnosti i hidrofobnosti uzoraka i tekućine. Uporaba dvije polarne i jedne nepolarne tekućine, omogućava izračun vrijednosti slobodne površinske energije po Owens Wendt i Wu modelu. Vanjsko magnetsko polje može smanjiti doprinos polarne komponente slobodne površinske energije, a vrlo malo utječe na disperznu komponentu slobodne površinske energije. Polarna komponenta slobodne površinske energije se najviše mijenja kod teflona. Taj podatak nam govori da magnetsko polje kod teflona djeluje samo na tekućinu, dok kod drugih materijala djeluje i na tekućinu i na materijal.
Abstract (english)
Surface tension is a physical size that describes the property of the liquid surface for which the surface of the free surface of the liquid is reduced. The cause of surface tension is the asymmetric distribution of intermolecular forces at the phase boundary. To see how the magnetic field affects the surface tension of given liquids, a series of measurements are used to compare the results. In the study, we used two polar solvents, redistilled water and formamide, and one nonpolar fluid, diiodomethane. Examined fluids are applied to aluminum, copper, iron and teflone samples, and by using goniometer the values of the contact angle are obtained. The same measurements are repeated in the presence of magnets. Based on the results of the contact angle results, interactions between the hyphrophilicity and the hydrophobicity of the samples and the fluid are observed. Using two polar and one nonpolar fluids allows the calculation of the free surface energy values by Owens Wendt and Wu model. The outer magnetic field can reduce the contribution of the polar component of free surface energy and have very little effect on the dispersant component of free surface energy. The polar component of free surface energy changes most with teflon. This information tells us that the magnetic field in teflon only acts on the liquid, while in other materials it acts also on the liquid and on the material.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:868160
Study programmeTitle: Applied Chemistry - Undergraduate study; specializations in: Environmental chemistry and green technologies, Advanced materials and technologies, Applied organic chemistry
Course: Advanced materials and technologies
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) primijenjene kemije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) primijenjene kemije)
Type of resourceText
File originBorn digital
Access conditionsOpen access
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Created on2021-03-18 11:55:34