A5066642013- Surfactants and Colloidal Systems
- Hydrogels: synthesis, properties, applications
- Enhanced Oil Recovery Techniques
- Electrostatics and Colloid Interactions
- Advanced Polymer Synthesis and Characterization
- Rheology and Fluid Dynamics Studies
- Material Dynamics and Properties
- Petroleum Processing and Analysis
- Pickering emulsions and particle stabilization
- Polymer Surface Interaction Studies
- Nanocomposite Films for Food Packaging
- Polysaccharides Composition and Applications
- Characterization and Applications of Magnetic Nanoparticles
- Analytical Chemistry and Chromatography
- Epoxy Resin Curing Processes
- Photopolymerization techniques and applications
- biodegradable polymer synthesis and properties
- Polymer Nanocomposites and Properties
- Lipid Membrane Structure and Behavior
- Thermodynamic properties of mixtures
- Analytical Chemistry and Sensors
- Lanthanide and Transition Metal Complexes
- Polysaccharides and Plant Cell Walls
- Antimicrobial agents and applications
- Synthesis and properties of polymers
Moscow State University
2008-2024
Lomonosov Moscow State University
2015-2024
Northern (Arctic) Federal University
2019-2021
Ural Branch of the Russian Academy of Sciences
2021
Russian Academy of Sciences
1998-2019
Stellenbosch University
2014
Kyoto University
2005-2007
Joint Institute for Nuclear Research
2002-2005
A. N. Nesmeyanov Institute of Organoelement Compounds
2005
Max Planck Institute for Polymer Research
1998-2002
The paper describes the synthesis, properties and applications of magnetic polymer beads. State-of-the-art, future challenges, promising trends in this field are analyzed. New oil recovery described.
pH-responsive gels of hydrophobically modified (HM) weak polyacid were prepared from acrylic acid and n-alkyl acrylates (n = 8, 12, 18). The HM obtained bear up to 20 mol % acrylate units randomly distributed along the network chains. pH-driven swelling these upon ionization in an aqueous medium was studied. effect fraction side chain length groups on equilibrium degree examined. It shown that transition shifts alkaline pH with increasing hydrophobicity gel. This explained by stabilization...
The aggregation phenomena in aqueous solutions of hydrophobically modified (HM) chitosan, containing 4 mol % n-dodecyl side chains, were studied by viscometry and fluorescence spectroscopy with pyrene as a probe. results are compared those for unmodified chitosan. Surprisingly, data reveal the appearance intermolecular hydrophobic aggregates both chitosan HM Nevertheless, these polymers exhibit quite different rheological properties: upon formation viscosity sharply increases, while that...
Rheological studies were performed with aqueous salt solutions of viscoelastic cationic surfactant erucyl bis(hydroxyethyl)methylammonium chloride (EHAC) and its mixtures hydrophobically modified polyacrylamide. The itself above the concentration crossover wormlike micelles exhibit two regions rheological response. In first region, they behave like polymer in semidilute regime characterized by behavior a spectrum relaxation times. second unlike their after shear is dominated single time....
In this article, we investigate the effect of hydrocarbon addition on rheological properties and structure wormlike micellar solutions potassium oleate. We show that a viscoelastic solution entangled chains is extremely responsive to hydrocarbons—the only 0.5 wt % n-dodecane results in drastic drop viscosity by up 5 orders magnitude, which due complete disruption micelles formation microemulsion droplets. study whole range transition into droplets discover it can be divided three regions:...
Novel viscoelastic smart suspensions based on cationic wormlike micelles (WLMs) of erucylbis(hydroxyethyl)methylammonium chloride and oppositely charged submicron magnetite particles in the presence added low molecular weight salt were prepared investigated. The demonstrate remarkable stability against sedimentation, which can be due to incorporation into network entangled WLMs by linking energetically unfavorable micellar end-caps. Added enhance significantly viscosity, plateau modulus,...
The main challenge of modern polymer science is to search for ways further development civilization, which obviously includes living organisms on the Earth, without harmful consequences civilization and planet in its entirety. review considers approaches handle problem environmental accumulation plastic waste. Promising trends technologies, can significantly reduce amount waste produced, are highlighted. Separate Sections address original methods additive manufacturing such as extrusion...
The virucidal activity of a series cationic surfactants differing in the length and number hydrophobic tails (at same hydrophilic head) structure head n-alkyl tail) was compared. It shown that an increase tails, as well presence benzene ring surfactant molecule, enhance against SARS-CoV-2. This may be due to more pronounced ability such penetrate destroy phospholipid membrane virus. Among studied, didodecyldimethylammonium bromide most efficient disinfectant, its 50% effective concentration...
The role of the hydrophobic effect in polyelectrolyte gel/ionic surfactant interactions was investigated. A series hydrophobically modified poly(acrylic acid) gels with well-controlled hydrophobicity synthesized by free-radical copolymerization acrylic acid n-alkyl acrylates (n = 8, 12, and 18) presence a cross-linking agent. interaction ionic surfactantsN-cetylpyridinium chloride sodium dodecylbenzenesulfonatewas studied. Four gel/surfactant combinations were considered: uncharged...
Rheological properties of aqueous solutions long-tailed cationic surfactant erucyl bis-(hydroxyethyl)methylammonium chloride (EHAC) were examined as a function concentration Cs different inorganic salts (KCl, CaCl2, and LaCl3) at fixed 0.6 wt %. The structural evolution micelles was followed by small-angle neutron scattering cryogenic transmission electron microscopy. It observed that, upon addition salt, the zero-shear viscosity η0 semidilute goes through maximum passing following three...
Rheological studies were performed with aqueous salt solutions of anionic surfactant potassium oleate and its mixtures hydrophobically modified polyacrylamide. Semidilute the in presence (KCl) demonstrate viscoelastic properties due to formation a transient network entangled wormlike micelles. These systems are highly responsive hydrocarbons: addition n-heptane or n-dodecane reduces viscosity by up 4 5 orders magnitude, thus inducing transition gellike system fluid one. It is transformation...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydrogen bonds in dilute solutions of poly(ethylene glycol)O. E. Philippova, S. I. Kuchanov, N. Topchieva, and V. A. KabanovCite this: Macromolecules 1985, 18, 8, 1628–1633Publication Date (Print):August 1, 1985Publication History Published online1 May 2002Published inissue 1 August 1985https://pubs.acs.org/doi/10.1021/ma00150a018https://doi.org/10.1021/ma00150a018research-articleACS PublicationsRequest reuse permissionsArticle...
Multichain aggregates together with individual macromolecules were detected by light scattering in dilute aqueous solutions of chitosan and its hydrophobic derivatives bearing 4 mol % n-dodecyl side groups. It was demonstrated that the size their aggregation numbers increase at introduction groups into polymer chains. The key result concerns effect chain length on behavior. shown for both unmodified hydrophobically modified (HM) chitosan, is independent single chains, which may from...
We studied the effect of neutral polymer poly(vinyl alcohol) on rheological properties and microstructure highly charged mixed wormlike micelles anionic cationic surfactants, potassium oleate n-octyltrimethylammonium bromide, without adding salt. It was shown that induces a hundredfold increase viscosity longest relaxation time appearance well-defined plateau modulus, which assigned to interlacing micellar chains. When amount added exceeds 2 wt %, characteristics (the viscosity, time,...
We study the rheological properties of wormlike micellar aqueous solutions an anionic surfactant potassium oleate containing solubilized 1-phenyldodecane. show that upon increasing amount absorbed hydrocarbon behavior semidilute changes drastically, showing a sequence different regimes: (i) "fast-breaking" entangled regime, when very long chains form network; (ii) "unbreakable" shortening micelles leads to decrease their reptation time up values close breaking time; (iii) unentangled regime...
We report a new facile method for the synthesis of prolate cobalt ferrite nanoparticles without additional stabilizers, which involves co-precipitation reaction Fe3+ and Co2+ ions in static magnetic field. The field is demonstrated to be key factor 1D growth nanocrystals synthesis. Transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectroscopy are applied characterize morphology structure obtained nanoparticles. According TEM, they represent nanorods with mean length 25...