20.500.12556/DKUM-65241 Synthesis of micro-composite beads with magnetic nano-particles embedded in porous CaCO[sub]3 matrix Sinteza mikrokompozitnih kroglic z magnetnimi nanodelci v porozni matriki CaCO[spodaj]3 A method for synthesis of soft magnetic microbeads is presented. The microbeads are made from magnetic nanoparticles dispersed in CaCO3 (calcium carbonate) matrix. The composite beads are almost perfectly spherical with a diameter of few micrometers. The majority of the composite beads consists of a porous CaCO3 matrix. Magnetic nanoparticles with a size of about 10-15 nm are made of Fe2O3. They are captured inside the pores of CaCO3 matrix during its formation. CaCO3 matrix is formed by crystallization from saturated solution of sodium carbonate and calcium chloride. The composite beads are coated with a layer of functionalized polymer. The magnetic microbeads were characterized by SEM and XPS. Different functional groups were detected by XPS measurements including SO3–,NH3+,NH2,CO32– and OH groups. The results indicate that the iron oxide particles are absent on the surface and that the polymer coating serves as a good biocompatible film. V tem prispevku predstavljamo metodo za sintezo delcev, ki so sestavljeni iz kompozita magnetnih nanodelcev v matrici iz kalcijevega karbonata (CaCO3). Velikost kompozitnih delcev, ki so popolnoma sferične oblike, je nekaj mikrometrov. Ključni del ogrodja kompozitnega delca sestavlja zelo porozna matrica CaCO3. Magnetni nanodelci velikosti približno 10-15 nm so narejeni iz Fe2O3. Ti nanodelci se med tvorjenjem matrice CaCO3 ujamejo v notranjost por. CaCO3 matrica se tvori pri kristalizaciji nasičene raztopine natrijevega karbonata in kalcijevega klorida. Tako nastali kompozit je nato oplaščen še s plastjo funkcionaliziranega polimera. Sintetizirane magnetne kompozitne delce smo analizirali z metodama SEM in XPS. Kot je razvidno iz XPS meritev, je prišlo na površini do nastanka različnih funkcionalnih skupin kot so SO3–,NH3+,NH2,CO32– in OH skupine. Rezultati dokazujejo, da na površini mikrodelcev ne najdemo nanodelcev, ki so skriti znotraj por, ter da lahko polimerna prevleka, ki prekriva mikrodelce, služi kot dobra biokompatibilna podlaga za nadaljnjo vezavo bioloških substanc. composite surface characterization XPS functionalization Fe nanoparticles microbeads kompoziti mikrokroglice nanotehnologija kalcijev karbonat železov oksid polimeri true false true Angleški jezik Slovenski jezik Znanstveno delo 2017-03-23 15:20:43 2017-03-23 15:22:08 2022-07-07 03:08:52 2019-07-11 15:12:04 2012 0 0 str. 57-61 št. 1 Letn. 46 jan.-feb. 2012 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1580-2949 620.3:546.723-31 106193664 25694759 1580-2949 URN:SI:UM:DK:KIEPTJ28 Materiali_in_tehnologije_2012_Porozni_et_al._SYNTHESIS_OF_MICRO-COMPOSITE_BEADS_WITH_MAGNETIC_NANO-PARTICLES_EMBEDDED_IN_POROUS_CaCO_3_M.pdf Materiali_in_tehnologije_2012_Porozni_et_al._SYNTHESIS_OF_MICRO-COMPOSITE_BEADS_WITH_MAGNETIC_NANO-PARTICLES_EMBEDDED_IN_POROUS_CaCO_3_M.pdf 1 EFCA9FA77D349ECC64A7451B95D50363 8b1897042890311b380c2c8648a64449babb0e7fe522ec9303c1ca2a3980a527 031abe1a-7c0e-11eb-bb7a-00155d0001ca https://dk.um.si/Dokument.php?lang=slv&id=110083 http://mit.imt.si/Revija/izvodi/mit121/vesel2.pdf 1 https://dk.um.si/Dokument.php?lang=slv&id=110082 Fakulteta za strojništvo 0 0 0