On the impact of surfactant type on the structure of aqueous ferrofluids

Петренко, В. И.; Artykulnyi, O.P.; Bulavin, L. A.; Almásy, László; Garamus, Vasil M.; Ivankov, O. I.; Grigoryeva, N. A.; Vékás, L.; Kopčanský, P.; Авдеев, М. В.

doi:10.1016/j.colsurfa.2017.03.054

Cited by 43 publications

(28 citation statements)

References 20 publications

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“…The structural features of several kinds of aqueous magnetic fluids [143][144][145][146], as well as surfactant/polymer solutions [147][148][149], which are used for magnetic nanoparticle stabilization in water, were investigated in detail by SANS (Figures 12 and 13). Additionally, magnetic nanoparticles with bio-macromolecules were successfully studied by SANS and SAXS [150,151] (Figure 14).…”

Section: Neutron and X-ray Scatteringmentioning

confidence: 99%

Magnetic Nanoparticle Systems for Nanomedicine—A Materials Science Perspective

et al. 2020

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Iron oxide nanoparticles are the basic components of the most promising magneto-responsive systems for nanomedicine, ranging from drug delivery and imaging to hyperthermia cancer treatment, as well as to rapid point-of-care diagnostic systems with magnetic nanoparticles. Advanced synthesis procedures of single- and multi-core iron-oxide nanoparticles with high magnetic moment and well-defined size and shape, being designed to simultaneously fulfill multiple biomedical functionalities, have been thoroughly evaluated. The review summarizes recent results in manufacturing novel magnetic nanoparticle systems, as well as the use of proper characterization methods that are relevant to the magneto-responsive nature, size range, surface chemistry, structuring behavior, and exploitation conditions of magnetic nanosystems. These refer to particle size, size distribution and aggregation characteristics, zeta potential/surface charge, surface coating, functionalization and catalytic activity, morphology (shape, surface area, surface topology, crystallinity), solubility and stability (e.g., solubility in biological fluids, stability on storage), as well as to DC and AC magnetic properties, particle agglomerates formation, and flow behavior under applied magnetic field (magnetorheology).

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Section: Neutron and X-ray Scatteringmentioning

confidence: 99%

Magnetic Nanoparticle Systems for Nanomedicine—A Materials Science Perspective

et al. 2020

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“…A high energy input would cause the size to decrease, but the structure would become more compact. Furthermore, it should be pointed out that the D f in this paper was smaller than 1.7, although some papers also reported similar data [33,34], which could be because the particle size of the diaspore in this paper was larger than in other papers [35,36]. Figure 7 shows the flotation performance of the diaspore flocs under different energy input conditions, and Table 3 presents the fitting results of the flotation kinetics using a first-order flotation model.…”

Section: Effect Of Energy Input Pretreatment On Flotation Performancementioning

confidence: 59%

Flocs Properties and Flotation Performance of Fine Diaspore with Energy Input Pretreatment Induced Using Sodium Oleate

Liao

2019

Minerals

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Energy input, an important factor affecting flocs properties and flotation performance, has rarely been studied in the field of diaspore flotation, which has severely limited our understanding of the flocculation flotation of fine diaspore. Therefore, in this study, the flocs properties and flotation performance of fine diaspore with energy input pretreatment were studied through flotation kinetics, flocs size measurements, and fractal dimension analysis. The results showed that the flocs size increased and the flocs structure became looser with the increasing energy input, while the flocs size decreased and the structure became compact when the energy input exceeded 10.93 kJ/m 3 . Meanwhile, there were significant differences in the flotation performance under different energy input pretreatment conditions, suggesting that the flotation performance of the fine diaspore was closely related with the flocs properties generated during the agitation process. In particular, the flotation performance was positively correlated with the flocculation degree of flocs, to a certain extent. The flocculation flotation of the fine diaspore benefited from a suitable energy input, and an excessive energy input was not conducive to flotation performance.

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“…The latter has protein-resisting properties and counteracts the rapid removal of magnetic particles from the organism [23]. The type of surfactant molecules and the parameters of the corresponding micellar system substantially affect the stability of the magnetic liquid system [24]. Addition of polyethylene glycol to magnetic fluid systems changes the structure of aggregates of magnetic particles in the system bulk [25] and violates the surfactant monomer balance, which results in the stability reduction of the whole system.…”

Section: Structural Studies Of Multicomponent Liquid Systems With Surmentioning

confidence: 99%

“…The influence of a surfactant on the structural organization of aqueous ferrofluids was analyzed on the basis of the small-angle neutron scattering (SANS) method. Aggregates of various sizes and types were observed for magnetite magnetic nanoparticles in deuterated water, if the system was stabilized with sodium oleate or dodecylbenzenesulfonic acid [24]. The surface tension measurements made it possible to detect a substantial difference between the critical micellization concentrations for the surfactants of two types.…”

Section: Structural Studies Of Multicomponent Liquid Systems With Surmentioning

confidence: 99%

Complexes of Surfactant Micelles with Polymers in Aqueous Liquid Systems

et al. 2020

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Researches on the structural self-organization and aggregation in aqueous liquid systems of surfactants and polymers have been reviewed. Main attention is focused on the results obtained for the interaction of ionic surfactants with non-ionic polymers. Capabilities of the small-angle neutron scattering and neutron reflectometry methods for the study of the micellar structure, micelle-polymer aggregates, and complex multicomponent systems with nanoparticles are considered. Brief information is provided on some complementary methods used for the structural analysis of liquid systems with self-organization.

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On the impact of surfactant type on the structure of aqueous ferrofluids

Cited by 43 publications

References 20 publications

Magnetic Nanoparticle Systems for Nanomedicine—A Materials Science Perspective

Magnetic Nanoparticle Systems for Nanomedicine—A Materials Science Perspective

Flocs Properties and Flotation Performance of Fine Diaspore with Energy Input Pretreatment Induced Using Sodium Oleate

Complexes of Surfactant Micelles with Polymers in Aqueous Liquid Systems

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