Chitosan is one of promising polymer from natural polysaccharides, which is an environmentally friendly compound from renewable raw materials. Chitosan has biodegradability, biocompatibility, and exhibits antimicrobial, antibacterial, and other activities. In this article, we report the rst use of copolymers based on glycidyl methacrylate and ( uoro)alkyl methacrylates as material surface wettability modi ers based on a chitosan, and we show that grafting of copolymers allows an increase in the hydrophobicity of lms with contact angles up to 114° and up to 154° for aerogels. The resulting chitosan aerogels have high porosity with a pore size of 100-200 µm and the pore walls are 0.6-0.7 µm-thick lm formations. Our study of lyophilic properties of modi ed chitosan substrates showed a change in the hydrophobicity of the materials as a function of length of the hydrocarbon radical in the side groups of ( uoro)alkyl methacrylates in the copolymers. Additionally, the rate of biodegradation of the resulting materials decreased with an increase in the number of hydrophobic groups in the modi er. Obtained chitosan materials with hydrophobic coatings have potential as a protective layer for wound dressings with an extended service life.

Chitosan is one of promising polymer from natural polysaccharides, which is an environmentally friendly compound from renewable raw materials. Chitosan has biodegradability, biocompatibility, and exhibits antimicrobial, antibacterial, and other activities. In this article, we report the first use of copolymers based on glycidyl methacrylate and (fluoro)alkyl methacrylates as material surface wettability modifiers based on a chitosan, and we show that grafting of copolymers allows an increase in the hydrophobicity of films with contact angles up to 114° and up to 154° for aerogels. The resulting chitosan aerogels have high porosity with a pore size of 100–200 µm and the pore walls are 0.6–0.7 µm-thick film formations. Our study of lyophilic properties of modified chitosan substrates showed a change in the hydrophobicity of the materials as a function of length of the hydrocarbon radical in the side groups of (fluoro)alkyl methacrylates in the copolymers. Additionally, the rate of biodegradation of the resulting materials decreased with an increase in the number of hydrophobic groups in the modifier. Obtained chitosan materials with hydrophobic coatings have potential as a protective layer for wound dressings with an extended service life.

The features of the modification of acid-soluble chitosan by carbonyl-containing compounds in solution and by the method of surface modification of molded materials are investigated. The dependence of the rheological properties of polysaccharide solutions on the structure of the hydrocarbon radical of the modifier is established. The formed films based on iminochitosans, obtained by the interaction of the polymer with aldehydes in a solution of acetic acid, have lower surface, hydrophobic, and strength characteristics compared to chitosan films. The possibility of biodegradation of the obtained materials, as well as the dependence of the mass loss of the samples on the HLB level, which can be used to create wound dressings with programmed degradation, is shown.