NINA KOTELNIKOVA

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A comparative study on two methods for dissolving of powder lignocelluloses, derived from wood lignocelluloses and from short-length flax fibers, in DMAc/LiCl was carried out. It was shown that DPv values of the samples and lignin content significantly affected their solubility. The lower these values were, the better the solubility of the samples was. The(More)
Lignincarbohydrate complexes (LCC) of poplar wood obtained by sulfate pulping and containing lignin in amounts of 0.9–8.3% have been studied by X-ray diffractometry. Heterogeneous hydrolysis methods have been used to determine their reactivity. The content of the crystalline fraction in LCC depends on the lignin removal and increases with the decrease of(More)
Stable super-swollen hydrogels were prepared in vitro from powder lignocelluloses of various origins via direct dissolution in DMAc/LiCl, followed by subsequent regeneration from the solutions. The main properties of the swollen hydrogels, such as equilibrium solvent content, porosity and dye uptake, were determined. The hydrogels retained large amounts of(More)
Adsorption properties of dressing cellulose materials with respect to surfactant antiseptics were studied. These antiseptics are a complex of the copolymer of N-vinylpyrrolidone and crotonic acid with dimethylbenzylalkylammonium chloride (a synthetic polymer with a wide spectrum of antimicrobial effect) and its low molecular weight analogue(More)
This project studies the dependence of the physical and chemical properties of powdered cellulose on their natural origin and conditions of preparation. We studied the effect of chemical composition and properties of the original native cellulose on the general characteristics of the powdered and microcrystalline cellulose obtained from arboreal and(More)
A component, chemical and morphological composition of wood of the Howea fosteriana palm and the Cereus peruvians cactus and the wood stem of the Dracaena sanderiana was studied. The supramolecular structure and the physicochemical properties of cellulose samples which were extracted from the wood species were examined by wide-angle X-ray scattering,(More)
MCC was made from cotton linter using mild acid hydrolysis in 2.5 M solution of HCl at 105° for 1 hour. For the SAXS experiments, MCC powder was immersed in distilled water, ethanol, and acetone about 3 weeks prior to the measurements. Also, dry MCC powder was measured using SAXS to be able to compare the MCC-solvents with the dry state. The previously done(More)
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