Cellulose HogC was produced by the modified traditional method with 35% yield from the stem of Sosnovsky hogweed and was characterized by elemental analysis, infrared (IR) spectroscopy, powder X-ray diffractometry, differential scanning calorimetry (DSC) and X-ray photoelectron spectroscopy (XPS). For HogC, the degree of crystallinity (approximately 70%) and the glass transition temperature (105–108 °C) were determined. It was found that the whiteness characteristic in the case of HogC was 92% and this significate was obtained without a bleaching procedure using chlorine-containing reagents. In this paper, the possibility of hydrophobization of HogC films by treatment with radiation-synthesized telomers of tetrafluoroethylene is shown. It was found that the contact angle of the telomer-treated cellulose film surface depended on the properties of the telomers (the chemical nature of the solvent, and the initial concentration of tetrafluoroethylene) and could reach 140 degrees.

One of the high-potential areas in the search for new medical materials was the study, creation and introduction into practice of materials based on chitosan (Ct). The unique complex of Ct properties, such as biocompatibility, biodegradability, non-toxicity against the background of high biological and sorption activity, makes it possible to attribute this aminopolysaccharide to a tiny group of industrially available, environmentally safe polymers and, to potentially new biomaterials based on it, extremely suitable for medical use. Ct rapidly undergoes biodegradation under the action of enzymes of a living organism, without forming toxic substances. Therefore, it can become an excellent biodegradable protective material for the treatment of open wounds and burns. The enzyme-containing chitosan materials – which are advisable to use at the stage of cleansing the wound from necrotic tissue and in the cosmetic therapy of keloid scars – are of exceptional interest. At the same time, it is possible in principle to control the speed of biological and hydrolytic degradation of materials on the wound surface. Due to its positive charge in acidic and neutral environments, chitosan has bioadhesiveness, bactericidal effect and promotes wound healing, absorbs biological fluids and helps tissue regeneration. Immobilization in chitosan gel, drying and storing various therapeutic agents and their mixtures in different directions affects the properties of the immobilized drug and its biological activity.

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It is proposed to synthesize one-component light-resistant urethane compositions using aldimines as crosslinking agents and methyl iodide as an activating agent to obtain sealants. The effect of the methyl iodide activator and the quaternized complex of the imine group and temperature on the cure time of the sealants was investigated. The influence of the polyether molecular weight and the structure of aldimines fillers on the physical and mechanical properties of the obtained sealants was studied.