surfactants

The paper describes the preparation of surface-active substances by sulfonation of unsaturated groups that are present in the composition of molecules of fatty unsaturated acids of triglycerides. Sunflower oil, chosen for its renewable and vegetable-based origin, served as the primary raw material. The method for producing sulfonated derivatives of fatty acid triglycerides is detailed, and the structures of the resulting products were verified using IR spectroscopy.

The paper shows the possibility of efficiently using oilseed production and processing waste. The methods of chemical transformation of by-products of oil and fat production into technological systems for sustainable development have been developed. They have been used to create surfactants and lubricant systems for hydrocarbon production and wwllorkover of wells; polyfunctional additives used as components of lubricants and cutting fluids to improve their antioxidant, extreme pressure, antiwear, lubricating, and cooling properties of metalworking processes.

Influence of different types of surfactants on electrodeposition of copper- and carbon-bearing (graphite, carbon nanotubes (CNTs)) composite powder has been experimentally investigated. The size of powder particles decreased, and corrosion resistance increased when surfactants were added. Addition of cationic surfactant CTAB to the electrolyte with simultaneous ultrasonic treatment for CNTs dispersion gives maximum effect.

In the present study, the formation procedure of iodine oxide particle (IOP) has been investigated in the presence of surfactants (nonanoic and stearic acids NA-SA) and humic acid (HA). It was established that iodine oxide which was mixed with the organic compounds (HA, NA and SA), and then irradiated with a xenon lamp leads to the formation of IOP. The evolution of formed particles number was followed by a scanning mobility particle sizer.

Adsorption of surfactants on varios types of adsorbent was experimentally investigated. Generalization of the obtained results of research and calculation data was carried out. Експериментально досліджено адсорбцію ПАР на різних типах сорбентів. Проведено узагальнення отриманих результатів досліджень та розрахункових даних. 

The surface active properties of new peroxide maleic monomers were investigated. The regularities of their copolymerization with styrene were studied. Peroxide polymers containing ditertiary alkyl peroxide groups in side substituents of backbone as the prospective high-temperature free radical macroinitiators were synthesized.

The possibility of associates formation between complex ferrumcyanide anions [Fe(CN)6]3–, [Fe(CN)6]4– and cationic polymethine dye pinacyanol in aqueous solution has been investigated. Energetic characteristics and the structures of associates were determined and the influence of ionic surfactants on the associates has been considered.

Herein, we discuss various physicochemical properties of cationic (CTAB), anionic (SDBS) and nonionic (TX-100) surfactants in the presence and absence of lysozyme, at different temperatures by using tensiometery. The surface excess (Γmax) decreases with the increase in temperature for all three kinds of surfactants in the presence and absence of lysozyme, but the most prominent decrease is to be observed for SDBS as compared to CTAB and TX-100 in the presence of lysozyme. The minimum area per molecule (Amin) follows the opposite trend as expected.