Publications by authors named "Julia V Kostina"
Poly(vinyl trimethylsilane) (PVTMS) films were subjected to direct surface fluorination in liquid medium (perfluorodecalin). The samples were investigated using several techniques: SEM-XEDS, XPS, ATR-IR, and contact angle measurement. The methods used allowed us to estimate chemical changes occurring because of the treatment.
View Article and Find Full Text PDFArticle Synopsis
- The study focuses on aqueous solutions of monoethanolamine (MEA), a chemical used to capture CO2 from gases, using both experimental and theoretical vibrational spectroscopy methods.
- It investigates how MEA interacts with water to form various molecular associations that influence CO2 retention, examining both the structural and energy characteristics of these interactions.
- The research also looks into how high temperatures and different concentrations of MEA affect these associations, identifying specific infrared spectral bands linked to effective CO2 adsorption and delayed desorption.
A direct fluorination technique was applied for the surface treatment of PIM-1 films in a liquid phase (perfluorodecalin). The fluorinated samples were analyzed by various instrumental techniques. ATR-IR spectroscopy showed that the fluorination predominantly takes place in methylene- and methyl-groups.
View Article and Find Full Text PDFPoly-2,6-dimethylphenylene oxide (PPO) film samples with varying degrees of crystallinity (from 0 to 69%) were obtained by means of different techniques. The films were studied by various physicochemical methods (Fourier-transform infrared spectroscopy, positron annihilation lifetime spectroscopy, X-ray diffraction, and H nuclear magnetic resonance relaxation). Solubility coefficients of gases in the PPO samples were measured via sorption isotherms of gases by volumetric technique with chromatographic detection.
View Article and Find Full Text PDF