diplomsko delo visokošolskega študijskega programa
Janko Schmidt (Author), Irena Ban (Mentor), Mihael Drofenik (Co-mentor)

Abstract

Namen diplomskega dela je bil poiskati parametre sinteze z metodo obarjanja v reverznih micelah oz. mikroemulzijah in nadaljnje obdelave, ki bi dajali CuNi magnetne nanodelce, za uporabo v magnetni hipertermiji. Z uporabo titracijske metode in ternarnih faznih diagramov smo preverili obmocja stabilnosti mikroemulzij, ki vsebujejo prekurzorje, potrebne za sintezo. Sintetizirali smo CuNi magnetne nanodelce razlicnih sestav, katere smo nadalje termicno modificirali. Vzorcem smo dolocili velikost delcev in jih kvalitativno analizirali z rentgensko praškovno difrakcijo (XRD). S termogravimetricno analizo (TGA) smo vzorcem dolocili Curiejevo temperaturo (Tc). Morfologijo nanodelcev smo preucili s transmisijskim elektronskim mikroskopom (TEM). Na koncu smo izvedli še magnetne meritve na magnetometru z vibrirajocim vzorcem (VSM). Oblika histerezne krivulje kaže, da imajo sintetizirani, "as prepared", delci vzorca množinske sestave Cu30Ni70 histerezno zanko z majhno koercitivnostjo. Morfologija sintetiziranega vzorca je kazala na mocno aglomeracijo delcev. Ta vzorec, ki smo ga nadalje termicno izotermno obdelovali tri ure na 500 °C v Ar/H2 atmosferi, je imel željeno Curiejevo temperaturo 45 °C. Tako pripravljen vzorec bi bil najbolj primeren za uporabo v magnetni hipertermiji. Iz rezultatov sklepamo, da so potrebne dodatne raziskave v smeri zmanjšanja aglomeracije med sintezo delcev.

Keywords

reverzne micele;magnetni nanodelci;Curierjeva temperatura;kemijsko soobarjanje;magnetna hipertermija;

Data

Language: Slovenian
Year of publishing:
Source: Maribor
Typology: 2.11 - Undergraduate Thesis
Organization: UM FKKT - Faculty of Chemistry and Chemical Engineering
Publisher: [J. Schmidt]
UDC: 544.567:620.3(043.2)
COBISS: 15224854 Link will open in a new window
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Downloads: 133
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Other data

Secondary language: English
Secondary title: Synthesis of CuNi nanoparticles within reverse micelles for the application in magnetic hyperthermia
Secondary abstract: The purpose of this work was to find parameters of the synthesis by microemulsion method (in reverse micelles) with chemical coprecipitation and further modification, that would give CuNi magnetic nanoparticles that are appropriate for the application in the magnetic hyperthermia. With use of the titration method and ternary phase diagrams we checked area of stability of microemulsions that contain precursors needed in the synthesis. Nanoparticles (CuNi) of various compositions were synthesized. Later, they were thermal modified. Samples size measurements and characterization were done by x-ray diffraction (XRD) analysis. With modified thermogravimetric analysis (TGA), Curie temperatures of samples were determined. Morphology of nanoparticles was studied with transmission electron microscope (TEM). At the end magnetic measurements were made with vibrating sample magnetometer (VSM). The slope of hysteresis curve shows low coercitivity. Morphology of that sample indicated agglomeration of particles. This sample was further isothermally modified for three hours at 500 °C in Ar/H2 atmosphere. It showed Curie temperature of 45 °C, so this sample would be the most suitable for the use in magnetic hyperthermia. Results revealed that further researches are needed to lower degree of agglomeration in process of the synthesis.
Secondary keywords: reverse micelles;magnetic nanoparticles;Curie temperature;chemical coprecipitation;magnetic hyperthermia;
URN: URN:SI:UM:
Type (COBISS): Undergraduate thesis
Thesis comment: Univ. v Mariboru, Fak. za kemijo in kemijsko tehnologijo
Pages: XV, 64 f.
Keywords (UDC): mathematics;natural sciences;naravoslovne vede;matematika;chemistry;crystallography;mineralogy;kemija;physical chemistry;fizikalna kemija;chemistry of high energy processes;applied sciences;medicine;technology;uporabne znanosti;medicina;tehnika;engineering;technology in general;inženirstvo;tehnologija na splošno;materials testing;commercial materials;power stations;economics of energy;preiskava materiala;blagoznanstvo;energetske centrale;energetika;nanotechnology;nanotehnologija;
ID: 1015054