L. I. Kutsenko

Properties of solutions and films of blends of water-soluble cellulose ethers with poviargol

Rheological properties of moderately concentrated aqueous solutions of blends of methyl cellulose and carboxymethyl cellulose with Poviargol antiseptic (nanodispersed silver stabilized with polyvinylpyrrolidone) were studied. Composite films were prepared from solutions of the polymer blends, and the physicomechanical and thermomechanical properties of the films were examined. The region of thermodynamic compatibility of cellulose ethers with Poviargol was determined by the method based on sorption of solvent vapor.

Properties of the methyl cellulose-polyvinylpyrrolidone binary system in solution and in the solid state

Rheological properties of dilute and moderately concentrated aqueous solutions of methyl cellulose-polyvinylpyrrolidone blends, as well as the conditions of gelation in them, were studied. Films were obtained from solutions of the polymer blends, and their physicomechanical properties were examined. The range of the compositions corresponding to thermodynamic compatibility of methyl cellulose with polyvinylpyrrolidone was identified by the solvent vapor sorption method and by thermomechanical examinations of the films.

Characteristics of Aqueous Solutions of Methyl Cellulose-Polymethacrylamidoglucose Mixtures

The characteristics of dilute (0.1%) and moderately concentrated (2%) aqueous solutions of methyl cellulose, polymethacrylamidoglucose, and their blends, and also the composition of films based on them were studied by viscosimetry, rheology, and IR spectroscopy. The effect of the mixture composition on the conditions of gel formation in methyl cellulose solutions was studied.

Properties of solutions and films of blends of ethyl cellulose with polyvinylpyrrolidone and Poviargol

Viscosity properties of dilute and concentrated ethanol solutions of blends of ethyl cellulose with polyvinylpyrrolidone and Poviargol bactericidal formulation (silver metal nanoparticles stabilized with polyvinylpyrrolidone) were studied. The physicomechanical and thermomechanical properties of films prepared from solutions of the polymer blends were determined. Experiments on solvent vapor sorption showed that ethyl cellulose is incompatible with polyvinylpyrrolidone and Poviargol in the solid state in the entire composition range examined.

Sulfoethyl cellulose ethers from flax fiber manufacturing waste

Synthetic conditions have been determined for obtaining sulfoethyl cellulose (SEC) from flax fiber manufacturing waste, namely, short fibers and lignified parts of pedicels (boon). The outcomes of sulfoethylation depend on the synthetic method, the molar ratio of the reactants, and the reaction time. Depending on the synthetic method, the resulting SEC is either insoluble or partially soluble in water. The products synthesized can be used as heavy-metal ion sorbents and as a substitute for carboxymethyl cellulose.

Thermochemical reactions of flax lignocarbohydrate complexes and their cyanoethylated derivatives

A thermochemical study of short flax fibers and boon and of their cyanoethylated derivatives was made with the aim to examine the possibility of preparing carbonized materials.

Synthesis of cyanoethyl ethers of cellulose from flax fiber production waste

Conditions of preparation of cellulose cyanoethyl ethers with different degrees of substitution, based flax fiber production waste were examined. The chemical structure of the resulting cellulose ethers and variation of the structure of the cellulose materials during cyanoethylation were examined by IR-Fourier spectroscopy and X-ray diffraction analysis. The degree of substitution of cellulose ethers was examined in relation to cyanoethylation conditions and chemical composition of the initial cellulose materials.

Sorption of vapors of organic solvents with cyanoethyl hydroxyethyl cellulose

The interaction of cyanoethyl hydroxyethyl cellulose with acetone, methylene chloride, and trifluoroacetic acid in the temperature range 10–50°C was studied by the solvent vapor sorption technique. The temperature and concentration dependences of the Flory-Huggins parameter for polymer-solvent interaction Z1 and the mechanism of the structural rearrangement in the systems were determined.