T. Yu. Kumeeva

• Institute of Solution Chemistry

The effect of low-temperature plasma generated in a fluorine-containing gas on the composition and properties of polypropylene films and non-woven materials was investigated. It was determined that fluorine-containing plasma treatment leads to a considerable increase in the hydrophobicity of polypropylene materials. It was shown that this effect is...

In the present work, we estimate whether the water-repellent properties of a polyester fabric hydrophobized with tetrafluoroethylene telomers can be controlled through texturing with nanosized SiO2 particles. The use of a composition containing SiO2 nanoparticles and tetrafluoroethylene telomers for hydrophobization of the polyester fabric is found...

The control possibility assessment of the water-repellent properties of polyester (PEF) fabric when its hydrophobizing with tetrafluoroethylene (TFE) telomers due to texturing by applying nanosized SiO2 is discussed. It was established that the use of a compound containing SiO2 nanoparticles and TFE telomers for hydrophobization of PEF fabrics led...

The article is devoted to assessing the effectiveness of the hydrophobization effect produced on the polyester fabric by tetrafluoroethylene telomeres obtained by radiation telomerization in trimethylchlorosilane. The indicators of the hydrophobicity of polyester fabrics have been determined and the morphology of the formed coatings has been studie...

In this paper, we show that functionalization of fibrous materials through coating formation is hindered by the need to preserve the capillary-porous system of the fabric and its drapability. Additionally, such coatings must be resistant to abrasion and washing. We consider ways of solving these problems by analysing the formation of a stable coati...

The effect of direct gas fluorination on the surface properties of a nonwoven polypropylene material was studied. Direct gas fluorination with mixtures of different compositions allows directional variation of the surface properties of the nonwoven polypropylene material. The surface becomes more hydrophobic when using a mixture of fluorine and nit...

The ability to impart an improved wettability to polyester fabric as a result of direct fluorination has been demonstrated. A surface energy of the fluorinated polyester material was calculated; its specific surface area and porosity was measured. The change in water absorption and capillarity of the fluorinated fabric was analyzed. The effect of d...

We investigated antimicrobial properties of polyester fabrics with photochemical activity that they gained owing to modification by small amounts of undoped and metal-doped titanium dioxide nanoparticles. We showed that the polyester fabric modified by undoped titanium dioxide leads to decolorization of colored impurities, but does not exhibit anti...

The dependence of the coefficients of friction of polyester fabrics with coatings based on telomeres of tetrafluoroethylene from species of telomeres has been investigated. The stiffness of coatings based on various telomeres of tetrafluoroethylene has been studied. The stability of tribological characteristics of the modified fabrics to operationa...

The surface properties of ultradisperse polytetrafluoroethylene coatings on polyethylene terephthalate materials modified in a supercritical carbon dioxide medium with co-solvent additions (aliphatic alcohols) were analyzed. An atomic force microscopy study revealed the peculiarities of the morphology of the hydrophobic coatings formed in the prese...

We have studied the photochemical activity of polyester fabrics modified with nanocomposites based on Fe-doped titania and evaluated the stability of the photocatalytic effect to external influences during service.

Modification of the polyester fabric using the diluted suspension of nanosized titanium dioxide is shown to make the fabric capable of decomposing the adsorbed contaminants under irradiation. The effect of different types of preactivation of polyester material on the self-cleaning ability of the fabrics is investigated. Chemical preactivation and p...

The possibility of using surface barrier discharge for the surface modification of polyester fabrics with the aim of making them more hydrophilic was studied. The action of surface-barrier discharge leads to the formation of hydrophilic oxygen-containing groups on the surface of polyester fabrics owing to weak degradation of poly(ethylene terephtha...

This article is devoted to the analysis of the surface properties of polyester textile materials modified with the tetrafluoroethylene telomeres synthesized in acetone and butyl chloride in order to impart high hydrophobicity to the materials. The particularities of the morphology of the formed hydrophobic coatings in the case of the use of various...

Tetrafluoroethylene (TFE) telomeres were synthesized in a butyl chloride solution using the radi� ation�chemical initiation of the reaction. The surface of a polyester material was modified with TFE telom� eres to impart superhydrophobic properties to the fabric.

A new technology for hydrophobization of synthetic fiber materials was described. This technological approach is based on formation of nanosized fluoropolymer coatings from solutions of low-molecularweight fraction of ultradispersed polytetrafluoroethylene and tetrafluoroethylene telomers. The mechanism of formation of protective coatings was descr...

The influence of the conditions of processing of polyester fiber material in the supercritical carbon dioxide (SC-CO2) medium on the localization of ethylene terephthalate cyclic oligomers on the surface of fibers is studied. It is shown that cyclic oligomers are deposited on the surface of polyester fiber materials in the form of large associates....

Hydrophobic coatings formed on a polyester fabric by treatment with telomeric solutions prepared by a radiation-chemical procedure in acetone and butyl chloride were studied by IR spectroscopy (MATIR), energy-dispersive analysis, and atomic force microscopy. The hydrophobic properties of the textile material were evaluated by procedures traditional...

This paper is devoted to analysis of the surface properties of polypropylene fibrous materials modified during molding via introduction of polytetrafluoroethylene ultradisperse powder into polypropylene melt. It is shown that the modification changes not only the bulk, but also surface, characteristics of the fibrous material. Evidence is provided...

A low-molecular-weight polytetrafluoroethylene coating deposited onto a polyester textile material from supercritical carbon dioxide with the aim to make the material hydrophobic was analyzed. The hydrophobic properties of the coating were examined in comparison with those of the hydrophobizing agent produced by Nuva (Switzerland).

It was shown that solutions of tetrafluoroethylene telomers in acetone form a coating on the surface of fabric which forms a thin fluoropolymer film after heat treatment and gives polyester fabrics a high level of water repellency. Methods of acting on the fibre material that allow additionally increasing the degree of water repellency due to regul...

It was shown that an ultrathin continuous fluoropolymer film that replicates the microrelief of the fibres forming the fabric is formed on the surface of polyester fabric when it is treated with a solution of a low-molecular-weight fraction of polytetrafluoroethylene in supercritical carbon dioxide. The protective coating formed is ultrahydrophobi...

It was shown that in treating PET fibre materials with a solution of ultradisperse, low-molecular-weight polytetrafluoroethylene in supercritical carbon dioxide, an ultrathin layer of fluoropolymer that gives the fabric a high degree of water repellency is formed on the surface.

A study is made of the effect of surfactants traditionally used in sizing on the mechanical splitting of starch and the properties of size based on maize starch. It is shown that chloramine can be excluded from the recipe. The negative effect of a whole range of surfactants on the mechanical splitting of starch is demonstrated. Surfactants based on...