diplomsko delo visokošolskega študijskega programa
Povzetek
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.
Ključne besede
reverzne micele;magnetni nanodelci;Curierjeva temperatura;kemijsko soobarjanje;magnetna hipertermija;
Podatki
Jezik: |
Slovenski jezik |
Leto izida: |
2011 |
Izvor: |
Maribor |
Tipologija: |
2.11 - Diplomsko delo |
Organizacija: |
UM FKKT - Fakulteta za kemijo in kemijsko tehnologijo |
Založnik: |
[J. Schmidt] |
UDK: |
544.567:620.3(043.2) |
COBISS: |
15224854
|
Št. ogledov: |
2353 |
Št. prenosov: |
133 |
Ocena: |
0 (0 glasov) |
Metapodatki: |
|
Ostali podatki
Sekundarni jezik: |
Angleški jezik |
Sekundarni naslov: |
Synthesis of CuNi nanoparticles within reverse micelles for the application in magnetic hyperthermia |
Sekundarni povzetek: |
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. |
Sekundarne ključne besede: |
reverse micelles;magnetic nanoparticles;Curie temperature;chemical coprecipitation;magnetic hyperthermia; |
URN: |
URN:SI:UM: |
Vrsta dela (COBISS): |
Diplomsko delo |
Komentar na gradivo: |
Univ. v Mariboru, Fak. za kemijo in kemijsko tehnologijo |
Strani: |
XV, 64 f. |
Ključne besede (UDK): |
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 |