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RISS 인기검색어
- 검색키워드
- 저자 : Vitali Lipik (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
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The Application of Silica and Glass Fibers in Effective Thermoinsulation of Winter Apparels
Guang Yang,Xueyang Liu,Vitali Lipik 한국섬유공학회 2018 Fibers and polymers Vol.19 No.7
We studied the influence of silica and glass fibers on the properties of polyester non-woven padding, fixing interesting changes in thermoinsulation, thickness and stiffness of obtained composites. It was found that the combination of inorganic and polyester fibers allowed for obtaining improved thermoinsulating property, compared to non-woven materials based on individual fibers. The improvement is attributed to the enhanced reflectance and the decreased air permeability, which can reduce the heat lost through radiation and convection. The application of inorganic fibers also made the development of non-woven materials with small thickness, keeping thermoinsulating property similar or better, compared to the commonly used polyester non-woven padding. Furthermore, the designed non-woven composites in real models of winter jackets were evaluated in a climate chamber at -10 oC by infrared thermal camera. The results showed that the addition of inorganic fibers allowed the surface temperature of winter jackets more than 5 oC lower than that of winter jacket with pure polyester padding. They significantly enhanced the protection from cold and reduced heat loss from the human body.
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Xueyang Liu,Guang Yang,Vitali Lipik 한국섬유공학회 2019 Fibers and polymers Vol.20 No.1
In this work, reagents with different amounts of aromatic rings were reacted with hydroxyl groups of cotton, aiming for washing stability and water repellency of treated cotton fabric. Different conditions of chemical transformation were considered, including the influence of carbonyl and ester chemical bonds, the quantity of aromatic ring in the reagent, and the properties of obtained cotton fabric. High contact angles were reached with the maximum of 140 o obtained at the usage of chlorotriphenylsilane. Six reagents used for cotton treatment have shown excellent washing stability, and their contact angles expressed the high water repellency of the fabric even after 10 washing cycles. Although mechanical properties of treated fabric were dropped for some samples due to the reduction of hydrogen bonds amount, stiffness of fabric decreased by up to 40 % which means softer fabric. The cotton fabric treated with reagent containing two aromatic rings exhibited the best properties of washing stability and water repellency.
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