Colloidal Stability of Silica-Modified Magnetite Nanoparticles: Comparison of Various Dispersion Techniques

被引：5
|
作者：
Dzhardimalieva, Gulzhian [1 ,2 ]
Bondarenko, Lyubov [1 ]
Illes, Erzsebet [3 ]
Tombacz, Etelka [4 ]
Tropskaya, Nataliya [1 ,5 ]
Magomedov, Igor [1 ]
Orekhov, Alexander [1 ]
Kydralieva, Kamila [1 ]
机构：
[1] Natl Res Univ, Moscow Aviat Inst, Dept Gen Engn, Moscow 125299, Russia
[2] Inst Problems Chem Phys, Lab Met Polymers, Chernogolovka 142432, Moscow Region, Russia
[3] Univ Szeged, Dept Food Engn, H-6720 Szeged, Hungary
[4] Univ Pannonia, Soos Erno Water Technol Res & Dev Ctr, H-8800 Nagykanizsa, Hungary
[5] Sklifosovsky Inst Emergency Med, Moscow 129090, Russia
来源：
NANOMATERIALS | 2021年 / 11卷 / 12期
关键词：
silica-modified magnetite nanoparticles; dispersion; zeta-potential; hydrodynamic size; polyanions loading; HUMIC-ACID; SURFACE-CHARGE; HEAVY-METALS; ADSORPTION; NANO; DISSOLUTION; REDUCTION; TRANSPORT; TOXICITY; RELEASE;
D O I：
10.3390/nano11123295
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The production of stable and homogeneous batches during nanoparticle fabrication is challenging. Surface charging, as a stability determinant, was estimated for 3-aminopropyltriethoxysilane (APTES) coated pre-formed magnetite nanoparticles (MNPs). An important consideration for preparing stable and homogenous MNPs colloidal systems is the dispersion stage of pre-formed samples, which makes it feasible to increase the MNP reactive binding sites, to enhance functionality. The results gave evidence that the samples that had undergone stirring had a higher loading capacity towards polyanions, in terms of filler content, compared to the sonicated ones. These later results were likely due to the harsh effects of sonication (extremely high temperature and pressure in the cavities formed at the interfaces), which induced the destruction of the MNPs.
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页数：14
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