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Removal of fine solids from bitumen by hetero-aggregation and magnetic separation using surface-modified magnetite nanoparticles. Part 1: Proof of concept. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121840] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Dzhardimalieva G, Bondarenko L, Illés E, Tombácz E, Tropskaya N, Magomedov I, Orekhov A, Kydralieva K. Colloidal Stability of Silica-Modified Magnetite Nanoparticles: Comparison of Various Dispersion Techniques. NANOMATERIALS 2021; 11:nano11123295. [PMID: 34947643 DOI: 10.3390/nano11123295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 11/16/2021] [Accepted: 12/02/2021] [Indexed: 11/16/2022]
Abstract
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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Affiliation(s)
- Gulzhian Dzhardimalieva
- Department of General Engineering, Moscow Aviation Institute, National Research University, 125299 Moscow, Russia
- Laboratory of Metal Polymers, Institute of Problems of Chemical Physics, 142432 Chernogolovka, Moscow Region, Russia
| | - Lyubov Bondarenko
- Department of General Engineering, Moscow Aviation Institute, National Research University, 125299 Moscow, Russia
| | - Erzsébet Illés
- Department of Food Engineering, University of Szeged, 6720 Szeged, Hungary
| | - Etelka Tombácz
- Soós Ernő Water Technology Research and Development Center, University of Pannonia, 8800 Nagykanizsa, Hungary
| | - Nataliya Tropskaya
- Department of General Engineering, Moscow Aviation Institute, National Research University, 125299 Moscow, Russia
- Sklifosovsky Institute for Emergency Medicine, 129090 Moscow, Russia
| | - Igor Magomedov
- Department of General Engineering, Moscow Aviation Institute, National Research University, 125299 Moscow, Russia
| | - Alexander Orekhov
- Department of General Engineering, Moscow Aviation Institute, National Research University, 125299 Moscow, Russia
| | - Kamila Kydralieva
- Department of General Engineering, Moscow Aviation Institute, National Research University, 125299 Moscow, Russia
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