Polysiloxane based on N-2-hydroxy-1,1-di(hydroxymethyl)ethyl-N'-3-triethoxysilylpropylurea was synthesized. The polymer forms small nanoparticles and their associates in water. The latter can retain poorly soluble luminophore and hydrophobic gadolinium complex. The doped particles are capable of interacting with proteins. Aqueous suspensions based on non-toxic siloxane nanoparticles can be used for visualization of results of assays of biological objects (bioimaging) by fluorescence and magnetic resonance tomography.

A method for synthesis of hyperbranched polysiloxane based on N -methyl- N -(2,3,4,5,6-pentahydroxyhexyl)- N ’-(3-triethoxysilylpropyl)urea is proposed. In water, the polymer forms nanoparticles capable of holding low soluble luminophores (tetracyanotetraarylporphyrazines) due to non-covalent interaction. Intensively luminescent stable aqueous suspensions based on non-toxic siloxane nanoparticles can be used in bioimaging.

Hydrolysis of N-methyl-N-(2,3,4,5,6-pentahydroxyhexyl)-N′-(3-triethoxysilylpropyl)urea gave water-soluble polysiloxane nanoparticles. They can be used for the preparation of intensely luminescent stable aqueous suspensions of water-insoluble or poorly soluble compounds (Eu(BTFA)3 · 6H2O complex and tetracyano-tetraaryl-porphyrazines) for biomedical applications, in particular, for bioimaging.

The use of vortex layer plants for dry grinding and regrinding of different powder-like materials (quartz sand, cement, micro-marble, chalk, dolomite, and diatomite) is considered. The high degree of efficiency of the plants is experimentally confirmed. Certain technological features of the process of milling of powder-like materials in a vortex-layer plant are established.

The using of the vortex layer plants using for the dry grinding and finishing of different powder-like materials: quartz sand, cement, micro-marble, chalk, dolomite, diatomite. The high efficiency of these plants was experimentally confirmed. Some technological peculiarities were established for the powder-like materials grinding process in the vortex layer plants. Ill. 7. Ref. 11.

This paper investigates the structure, length, and percentage of functional groups of multi-walled carbon nanotubes (CNT) depending on the time taken for functionalization in HNO3 and H2SO4 mixture. The carbon nanotube content and influence of functionalization time on mechanical properties of polymer composite materials based on epoxy matrix are studied. The extreme dependencies of mechanical properties of carbon nanotube functionalization time of polymer composites were established. The rise in tensile strength of obtained composites reaches 102% and elastic modulus reaches 227% as compared to that of unfilled polymer. The composites exhibited best mechanical properties by including carbon nanotube with 0.5h functionalization time.

It is shown that linear-dendritic block copolymers poly(N-isopropylacrylamide)–block–polyphenylenegermane can be prepared by the polymerization of N-isopropylacrylamide in the presence of bis(pentafluorophenyl)germane followed by activated polycondensation with tris(pentafluorophenyl)germane. The properties of the dilute solutions and Langmuir monolayers of the functional polymers and the linear-dendritic block copolymers of N-isopropylacrylamide are studied.

This research is devoted to the study of radar absorbing properties of the composites, based on the epoxy binder and carbon nanotubes (CNT) in the frequency range of 52–73 GHz. Three species of unmodified multi-walled CNT differing in length and diameter were investigated as fillers. The reflection coefficients (K refl) at the radar absorbing material (RAM)–air interface and the electro-magnetic radiation (EMR) absorption coefficients (K abs) in the materials with the different content of nanotubes were measured (K refl and K abs were calculated using the highest (the worst) value of the voltage standing-wave ratio (VSWR) in the frequency range of 52–73 GHz). It was established that the increase in nanotubes aspect ratio (a ratio of CNT length to its diameter) leads to K abs rising for polymer composites. Also, CNT diameter decrease leads to K refl reduction. CNT of 8–15 nm in diameter and more than 2 μm in length are the most effective from all investigated fillers. The reflection loss values were calculated and CNT optimal concentrations were obtained at different thickness of RAMs.