magistrsko delo
Povzetek
Zaradi potrebe po preprostejši in cenovno ugodnejši proizvodnji nanodelcev je ključno
razviti nove tehnike sinteze. Eno izmed področij z velikim potencialom za razvoj novih
sinteznih postopkov za izdelavo nanodelcev je mikrofluidika. Miniaturizacija procesov v
mikropretočnih napravah omogoča intenzifikacijo ter bolj nadzorovano sintezo
nanodelcev. Prav nadzorovani reakcijski pogoji namreč omogočajo sintezo
monodisperznih nanodelcev.
V okviru magistrskega dela smo se posvetili razvoju mikropretočnega sistema za
kontinuirno sintezo magnetitnih nanodelcev. Pri tem smo preizkusili različne
mikrofluidne naprave in primerjali njihove prednosti in slabosti. Prav tako smo v okviru
magistrskega dela tudi izdelali mikroreaktor iz polidimetilsiloksana.
To delo zajema meritve velikosti in zeta potenciala delcev sintetiziranih v mikrofluidnem
sistemu, ki temelji na dodajanju reagentov v nestabilizirane kapljice. Pri tem smo tudi
preverili vpliv dodatka različnih količin stabilizatorja citronske kisline. Rezultati kažejo,
da se s povečanjem dodatka stabilizatorja premer delcev manjša, dokler ne pride do
raztapljanja nanodelcev. Prav tako dodatek citronske kisline izboljša stabilnost
nanodelcev, kar je tudi skladno z rezultati iz literature. S postopkom smo izdelali stabilne
nanodelce velikosti okoli 100 nm in zeta potencialom višjim od 30.
Ključne besede
nanotehnologija;magnetizem;magnetit;mikroreaktorji;zeta potencial;porazdelitev velikosti delcev;magistrska dela;
Podatki
Jezik: |
Slovenski jezik |
Leto izida: |
2024 |
Tipologija: |
2.09 - Magistrsko delo |
Organizacija: |
UL FKKT - Fakulteta za kemijo in kemijsko tehnologijo |
Založnik: |
[U. Oblak] |
UDK: |
620.3:66.02(043.2) |
COBISS: |
189069827
|
Št. ogledov: |
29 |
Št. prenosov: |
3 |
Ocena: |
0 (0 glasov) |
Metapodatki: |
|
Ostali podatki
Sekundarni jezik: |
Angleški jezik |
Sekundarni naslov: |
Synthesis of magnetic nanoparticles in a microfluidic system |
Sekundarni povzetek: |
The need to make nanoparticles simpler and cheaper to produce makes it essential to
develop new synthesis techniques. One area with great potential for the development of
new synthesis processes for the production of nanoparticles is microfluidics.
Miniaturization of processes in microfluidic devices allows for intensification and more
controlled synthesis of nanoparticles. In fact, controlled reaction conditions allow the
synthesis of monodisperse nanoparticles.
In the framework of the MSc thesis, we focused on the development of a microflow
system for the continuous synthesis of magnetite nanoparticles. In this context, different
microfluidic devices were tested and their advantages and disadvantages were compared.
We have also developed a microreactor made of polydimethylsiloxane as part of the
master thesis.
Particles synthesized in a microfluidic system based on the addition of reagents to
unstabilized droplets were measured for size and zeta potential. The effect of the addition
of different amounts of citric acid, which acts as a particle stabilizer, on the particle size
was also verified. The results show that as the addition of the stabilizer increases, the
particle diameter decreases until nanoparticle dissolution occurs. Also, the addition of
citric acid improves the stability of the nanoparticles, which is also consistent with the
results reported in the literature. The process produced stable nanoparticles with a size of
about 100 nm and a zeta potential higher than 30. |
Sekundarne ključne besede: |
magnetite;nanotechnology;microfluidics;zeta potential;particle size distribution;Nanodelci;Magneti;Mikrofluidna tehnika;Univerzitetna in visokošolska dela; |
Vrsta dela (COBISS): |
Magistrsko delo/naloga |
Študijski program: |
1000376 |
Komentar na gradivo: |
Univ. v Ljubljani, Fak. za kemijo in kemijsko tehnologijo, smer Kemijsko inženirstvo |
Strani: |
1 spletni vir (1 datoteka PDF (79 str.)) |
ID: |
23140499 |