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Shevchuk A.F.,Vinnitsa National Agricultural University | Koval'chuk A.V.,Kyiv National University of Technologies and Design
Journal of Nano- and Electronic Physics | Year: 2015

This paper presents the research results of light influence on the dielectric properties of the structure fullerene film C60 / film of ferroelectric liquid crystal (FLC). It is experimentally shown that in the chiral smectic phase of FLC, unlike other phases, lighting of structures leads to a decrease in capacity (negative photodielectric effect). The mechanism of this effect is offered. On the basis of obtained data, the explanation of the positive photodielectric effect, which has been found in the work for studying [1] of colloidal solution FLC + 43 wt. % mixture of fullerenes C60 + C70, is given. © 2015 Sumy State University.


Glubish P.A.,Kyiv National University of Technologies and Design
Polymer Science - Series D | Year: 2013

Findings on the effect of neutralizing substances on rheological properties of products of the destruction of collagen-containing materials are presented. The dependences between the shear velocity and shear stress and between shear stress and viscosity of the products of alkaline destruction of collagen-containing materials neutralized by different acids are established. © 2013 Pleiades Publishing, Ltd.


Halavska L.,Kyiv National University of Technologies and Design | Batrak O.,Kyiv National University of Technologies and Design
IOP Conference Series: Materials Science and Engineering | Year: 2016

A new trend in the world is the clothing production using the new types of ecological raw materials application - milk, pineapple, coconut, hemp, banana, eucalyptus, clams, corn, bamboo, soya, nettle yarn. This makes it possible to create textile materials of new generation with unique antibacterial and antiseptic properties. Such materials have a positive preventive and sometimes therapeutic effect on people, and their health. Eco-raw materials clothing is able to protect the human body from the environment harmful effects: cold, heat, rain, dust, opportunely remove from underclothing layer the steam and gases, sweat; maintain in underclothing layer the necessary microclimate for normal organism functioning. Study of knitwear consumer properties, produced with eco-materials, is an urgent task of the world vector, directed on ecological environmental protection. This paper presents the research results of hygroscopicity and capillarity weft knitted fabrics, what knitted from different types of eco-raw materials: bamboo yarn, yarn containing soybean and nettle yarn. Character of influence of the liquid raising level changes depending on the experiment time and the knitting structure is revealed. © Published under licence by IOP Publishing Ltd.


Kyzymchuk O.,Kyiv National University of Technologies and Design | Melnyk L.,Kyiv National University of Technologies and Design
IOP Conference Series: Materials Science and Engineering | Year: 2016

The features of elasticized knitted fabric are: high extensibility, elasticity and adaptability to a body shape and a compression effect when it is used in the extended state. The elasticity of a knitted fabric is enhanced by the incorporation of elastane thread or core-spun yarn into the knitted structure as the weft yarn that is laid in the stretching direction. The quality of elasticized knitted fabrics is determined by the reliability of the how the elastomeric yarn is fixed within as the structure is deformed with an increase in the contact areas between the elastomeric and conventional yarns. The high fixing level can be achieved by the nature of loops formed from the elastomeric yarn. The simultaneous union of both conditions is possible with miss-knitting of elastomeric yarn through a certain number of needles. The main purpose of this study is to establish the influence of miss knit repeat of elastomeric yarn on the structural parameters and determine the stretch properties of the elasticized knitted fabric that formed by an alternation of two courses of 1x1 rib from cotton yarn and one course of miss knit (from 2 to 10 Wales between the loops) from core-spun yarn with elastane core. © Published under licence by IOP Publishing Ltd.


Nikonova A.,Kyiv National University of Technologies and Design | Andreyeva O.,Kyiv National University of Technologies and Design | Maistrenko L.,Kyiv National University of Technologies and Design
IOP Conference Series: Materials Science and Engineering | Year: 2016

Abatement of negative impact of leather industry on the environment is associated with scientifically grounded use of chemical materials and raw materials, with the development of low-toxic and low-waste technologies. A solution of this problem can be development and implementation of pre-tanning and tanning processes alternative technologies with the use of polymeric compounds. To replace traditional pickling process advanced polymeric material based on acrylic acid has been used. It has been found experimentally that application of the polymeric processing intensifies the tanning process, increases the thermostability of leather with more rational use of chemical materials. The content of chrome (III) compounds, chlorides and sulphates in waste water are reduced. © Published under licence by IOP Publishing Ltd.


Kozar O.P.,Mukachevo State University | Oliynykova V.V.,Kyiv National University of Technologies and Design | Konoval V.P.,Kyiv National University of Technologies and Design
Key Engineering Materials | Year: 2013

The aim of this study is to improve the heat resistance performance of polyurethane based adhesives for the manufacture of shoes. Four polyurethane adhesive compositions most used in the domestic shoe industry have been investigated: PU-503, VU-252, KYSPO-1 and D-274. The main components of polyurethane compositions are urethane rubber, zeolite, ethyl acetate and acetone. It has been found that modification of VU-252, KYSPO-1 and D-274 with zeolite in the amount of 0.5-1% allow to increase the heat resistance to 150° C while that of PU-503 - to 200° C. Besides it has been found that adhesive compositions can be recommended for the manufacture of special fire-resistant shoes that could withstand high thermal loads. © (2013) Trans Tech Publications, Switzerland.


Kuznetsova E.,Kyiv National University of Technologies and Design
Metallurgical and Mining Industry | Year: 2015

The options for improving energy efficiency of a standard residential building built in 1960s were investigated and analyzed and the structure of the heat losses of the building prior to and after the thermal renovation was determined. Thermal renovation of buildings leads to significant cost savings for space heating. Thus, the implementation of energy-efficient solutions for the analyzed building can lead to the following achievements: replacement of windows by more energy efficient ones leads to a reduction in heating energy consumption by 14,7%; insulation of external walls with bringing resistance to heat transfer to the normative values reduces heat losses by 40,4%; the most quantity of heat energy conservation (76,8%) is achieved by the integrated approach (external building envelope insulation, installation of energy efficient windows, refurbishment of the heating system). Knowing the value of investments in energy saving measures, the payback period can be calculated as well as the optimal energy-saving solution can be determined. The analysis and comparison of different energy saving solutions can be used to identify ways for further upgrading of buildings.


Lischuk V.,Kyiv National University of Technologies and Design
Proceedings of the 3rd International Conference on Advanced Materials and Systems, ICAMS 2010 | Year: 2010

The non-chrome tanning technology for cattle hide was designed. This technology provides to use a "Tansin VP" syntan during pretreatment of hide and main tanning by Chestnut from "Tanin" (Slovenia) or "Chemitan TA" from "Chemipol" (Poland). The application of "Chemitan TA" tanning material makes possible the increase in leather hydrothermal resistance up to 82°C, which is necessary to obtain a chrome-free crust of various applications.


Mokrousova O.,Kyiv National University of Technologies and Design
Proceedings of the 3rd International Conference on Advanced Materials and Systems, ICAMS 2010 | Year: 2010

The organo-mineral compounds with bentonite and lignosulfonats for retanning-filling leather semi-finished item were offered. The use of obtained organo-mineral compounds allows increasing the formation of derma volume and leathers resistance to mechanical actions.


Avdonin K.V.,Kyiv National University of Technologies and Design
Journal of Nano- and Electronic Physics | Year: 2015

The paper describes relative one-dimensional motion of two relativistic particles: electron and neutral particle in a weak uniform electric field directed along their common moving direction. Motion is considered in two reference frames: inertial and noninertial associated with an electron. A method for obtaining the transformation of coordinates is proposed. An example of application of the obtained equations is shown. Desired limits are specified. © 2015 Sumy State University.

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