triethoxysilyl)propyl]-heptane amide, is an effective water-repellent for different fabrics. Its application from solution in supercritical carbon dioxide followed by heat treatment gives the surfaces of fabrics stable water-repellent properties. The use of SC-CO 2 as a universal medium for treating fabrics allows eliminating the use of organic solvents, which significantly reduces the ecological load on the environment, simplifies the manufacturing process, and makes it safer.Giving different materials and articles water-repellent properties is a pressing problem. This is due to both elaboration of fundamental concepts concerning hydrophilic-hydrophobic systems and to a number of technical factors -the heightened requirements for the level of surface water repellency and the appearance of new materials and methods of treating surfaces of different natures. The important volume of accumulated knowledge on the problem of surface water repellency can arbitrarily be divided into two large groups -chemical and physical. Synthesis of new water-repellent compounds and development of methods of applying them on the surface of materials to ensure a high level of water repellency belong to the first group. The second group includes physical methods of treating the surface, for example, nanostructuring, conducted for the same purpose.In general form, treatment of materials to give them water-repellent properties implies reducing the surface energy. The preparations used for this purpose can be placed in the following order of increasing water-repellent activity: paraffins, silanes and siloxanes, fluorine-containing hydrocarbons [1]. These types of compounds are usually used in the form of emulsions (for example, surfactants of the general structural formula CF 3 -(CF 2 ) n -X or CF 3 -(CF 2 ) n -(CH 2 ) m -X, where X is a charged or uncharged polar group, and the value of n is no greater than 9 [1]) or fluorine-containing polymer latexes [2, 3]. However, their efficacy is a function of the presence of additional components (stabilizers, solvents, different industrial additives, etc.) which decrease the quality of the treatment. In addition, in drying, due to forces of surface tension,

Advances in the production of textiles and items with hydro-and lipophobic and anti-adhesive properties are being made in a variety of critical directions of modern materials science with the aim of increasing the quality and competitiveness of the manufactured product. Complicated problems can be solved by using a comprehensive approach that is based on fundamental research of surface phenomena, the synthesis and preparation of new hydrophobic agents, and the improvement and development of new technical methods for finishing materials. The combined hydro-and lipophobic properties of materials are usually expressed by the term lyophobicity [1]. Lyophobicity is largely determined by the resistance of items to the action of various types of contaminants.At present, research is focused on the replication of the so-called lotus-effect, i.e., the design of superhydrophobic self-cleaning coatings that are characterized by high wetting angles and minimal angles for sliding of water drops from the surface. Such materials are being studied in dozens of scientific centers in Russia and abroad because of their unique properties (water-repellant, lipophobic, resistant to organic contaminants, etc.). Two main parameters must be considered in producing superhydrophobic properties. These are the hierarchy of surface structure including that at the nano-sized level and low critical surface tension values. The latter can be attained using various hydrophobic agents, among which functionalized fluoroorganosilicon compounds are preferred [2].It was shown earlier [3] that the use of fluorosilanes as hydrophobic agents for finishing fabrics of various composition could make them highly lipophobic. However, highly hydro-and lipophobic textiles and items based on them would be interesting to various consumers if these effects were retained during prolonged use. Herein the resistance of the lyophobic properties of modified cotton fabric to the action of various (climatic, mechanical, multiple washings, etc.) wear factors is studied.We used cotton fabric (art. 14, GOST 29298-92, madepolam) that was washed before treatment. The modifier was 2,2, 3,3,4,4,5,5,6,6,7,7,8,8,9,9,9-heptadecafluoro-N-[3-(triethoxysilyl)propyl]nonanamide (MA) of structural formulaThe compound was a yellowish oil of density 1.4324 g/cm 3 and surface tension 23.4 mJ/m 2 . Samples were treated by immersing them for 5 min in MA solution (5%) in EtOH. Then, samples were pressed to 70% moisture, dried at 130°C for 10 min, and ironed at 180 ± 2°C for 1 min. The need to perform the last step was demonstrated earlier [4,5].

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The article is devoted to fundamental and applied research in the field of the processing of polymer solutions. The purpose of this work was to identify the possibility of using modified solutions of polyurethanes for processing by electrospinning, and also to study the impact of the composition of the moulding solution on the structure and properties of fibrous materials. Nonwoven materials were obtained by electrospinning fibers from PUR solutions using NanospiderTM technology. The transfer of solutions into a metastable state, both in the case of film systems and fibres, leads to a change in the structure of the material: porosity and fiber diameter.

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