Superparamagnetic Composites Based on Ionic Resin Beads/CaCO3/Magnetite.
The preparation of superparamagnetic composites obtained by CaCO3mineralization from supersaturate aqueous solutions is presented. The preparation was conducted in the presence of oleic acid stabilized magnetite nanoparticles as a water-based magnetic fluid and insoluble templates as gel-like cross-linked polymeric beads. The presence of the magnetic particles in the composites provides a facile way for external manipulation using a permanent magnet, thus allowing the separation and extraction of magnetically modified materials. Two ion exchangers based on divinylbenzene/ethyl acrylate/acrylonitrile cross-linked copolymer-a cation ion exchanger (CIE) and an amphoteric ion exchanger (AIE)-were used, as well as different addition orders of magnetite and CaCO3crystals growth precursors. The morphology of the composites was investigated by SEM, the polymorphs content by X-ray diffraction, and the thermal stability by thermogravimetric analysis. Polymer, CaCO3, and magnetite in the composite particles were shown to be present by energy dispersive X-ray (EDX), XPS, and TEM. The sorption capacity for CuIIions was tested, as compared to samples prepared without magnetite.
"Petru Poni" Institute of Macromolecular Chemistry, Romanian Academy, Grigore Ghica Voda Alley 41A, 700487, Iasi, Romania.
Ion
I
Bunia
Romanian Academy-Timisoara Branch, Center for Fundamental and Advanced Technical Research, Laboratory of Magnetic Fluids, 24 Bd. Mihai Viteazul, 300223, Timisoara, Romania.
Vlad
V
Socoliuc
Romanian Academy-Timisoara Branch, Center for Fundamental and Advanced Technical Research, Laboratory of Magnetic Fluids, 24 Bd. Mihai Viteazul, 300223, Timisoara, Romania.
Ladislau
L
Vekas
"Petru Poni" Institute of Macromolecular Chemistry, Romanian Academy, Grigore Ghica Voda Alley 41A, 700487, Iasi, Romania.
Florica
F
Doroftei
"Petru Poni" Institute of Macromolecular Chemistry, Romanian Academy, Grigore Ghica Voda Alley 41A, 700487, Iasi, Romania.
Cristian
C
Varganici
"Petru Poni" Institute of Macromolecular Chemistry, Romanian Academy, Grigore Ghica Voda Alley 41A, 700487, Iasi, Romania.
Adina
A
Coroaba
"Petru Poni" Institute of Macromolecular Chemistry, Romanian Academy, Grigore Ghica Voda Alley 41A, 700487, Iasi, Romania.|Department of Natural and Synthetic Polymers, "Gh. Asachi" Technical University of Iasi, 73 Prof. Dimitrie Mangeron Street, Iasi, 700050, Romania.
Bogdan C
BC
Simionescu
"Petru Poni" Institute of Macromolecular Chemistry, Romanian Academy, Grigore Ghica Voda Alley 41A, 700487, Iasi, Romania.
Marcela
http://orcid.org/0000-0003-3193-0609
M
Mihai
CaCO3; cation ion exchange; magnetic fluids; materials science; superparamagnetic composites