Wyniki wyszukiwania - Biblioteka Nauki

1

Evaluation of electrically conducting fabrics for use as layers protecting against mechanical damages

100%

Tokarska M. , Czyżnik N.

Technologia i Jakość Wyrobów

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2023

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tom R. 68

93--110

EN

The unique characteristic of the electroconductive fabric-based sensor is its ability to generate an electric signal directly in response to external stimuli. A fabric-based layer can protect objects and simultaneously monitor changes in resistance. It was found that the electrical resistance of fabric increases with increased mechanical damage to its surface. As the resistance increases, the fabric loses its protective properties, which may damage the object. The analysis of static characteristics enabled the selection of fabrics characterised by the widest range of electrical resistance, which results in a desirable higher sensitivity factor of the fabric-based sensor.

PL

Unikalną cechą sensora na bazie tkaniny elektroprzewodzącej jest jego zdolność do generowania sygnału elektrycznego bezpośrednio w odpowiedzi na bodźce zewnętrzne, np. uszkodzenia mechaniczne. Warstwa tkaniny może chronić obiekty i jednocześnie monitorować zmiany rezystancji. Stwierdzono, że rezystancja elektryczna tkaniny wzrasta wraz ze wzrostem uszkodzeń mechanicznych jej powierzchni. Wraz ze wzrostem oporu tkanina traci swoje właściwości ochronne, co może skutkować uszkodzeniem obiektu. Analiza charakterystyk statycznych umożliwiła wybór tkanin charakteryzujących się najszerszym zakresem rezystancji elektrycznej, co skutkuje większą czułością sensora.

2

Effect of Metallisation of Basalt Fabric on Its Surface Resistivity

80%

Miśkiewicz P. , Tokarska M. , Frydrych I. , Pawlak W.

Fibres & Textiles in Eastern Europe

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2021

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tom Vol. 29, no. 1 (145)

41--46

EN

The main aim of the research was to carry out the surface modification of basalt fabric in order to improve selected thermal properties of the material, i.e., resistance to contact and radiant heat, to apply it in a hot work environment. Attention was focused on checking whether the metal coating deposited does not cause too high conductivity, which is dangerous to human health. The process of magnetron sputtering with the use of chromium and aluminum of various thickness values was applied to basalt fabrics. Based on scanning electron microscope analysis, it was found that none of the aluminum or chromium coatings covered 100% of the basalt fabric surface. Results of the surface resistance analysis of four out of the six samples of basalt fabrics tested indicate that they belong to anti-static materials. The metallic coatings obtained can potentially be used to improve the thermal properties of basalt fabric mentioned.

PL

Surowiec mineralny, który jest włóknem bazaltowym w przemyśle tekstylnym, jest wykorzystywany przede wszystkim do produkcji wyrobów technicznych, odzieży odpornej na czynniki termiczne i mechaniczne oraz jej elementy. Celem badań było określenie wpływu metalizacji powierzchni tkaniny bazaltowej na jej cechy. Na próbkach tkaniny bazaltowej osadzono warstwy chromu i aluminium o różnych grubościach stosując metodę rozpylania magnetronowego. Tkaniny oceniono metodami pomiaru rezystancji powierzchni i analizy skaningowego mikroskopu elektronowego. Zaobserwowano wzrost rezystywności powierzchniowej powleczonej tkaniny bazaltowej w stosunku do tkaniny niepowleczonej. Jednak metalizacja tkanin nie spowodowała utraty właściwości izolacyjnych materiałów. Żadna z warstw aluminium ani chromu nie pokrywała 100% powierzchni tkaniny bazaltowej. Uzyskano dobrą przyczepność powłoki do podłoża.

3

Study on the use of Aerogel on the Surface of Basalt Fabric

80%

Miśkiewicz P. , Frydrych I. , Tokarska M.

Autex Research Journal

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2020

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tom Vol. 20, no. 2

168--177

EN

The layer of aerogel was applied to the surface of basalt fabric due to the possibility of improving a fabric protecting against the influence of hot environmental factors. The analysis of aerogel surface roughness and thickness of the obtained sample, resistance to contact heat for the contact temperature between 100°C and 250°C, and tests of resistance to the penetration of thermal radiation were carried out. In addition, thermal conductivity, thermal resistance, thermal diffusion, thermal absorption, and surface roughness were determined. The obtained results indicate the unevenness of aerogel application on the surface of basalt fabric. For this reason, work should be carried out on an appropriate technology that will allow them to be applied evenly on the surface of the fabric. The parameters tested and the results obtained are promising in terms of the possibility of using the fabric obtained in protective gloves.

4

Evaluation of Insulation against Contact Heat, Radiant Heat and Sensory Comfort of Basalt Fabric-Based Composites with Parylene C Coating

80%

Tokarska M. , Miśkiewicz P. , Puszkarz A. K. , Nosal A.

Fibres & Textiles in Eastern Europe

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2023

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tom Vol. 31, no. 5

99--108

EN

The article concerns research on using Parylene C coating on basalt fabric-based composites with potential use in protective clothing to improve their insulation against contact heat and radiant heat, as well as the sensory comfort of the user. The outcomes of the contact heat method showed that applying Parylene C coating improved the thermal insulation of all tested composites. Two of them achieved the first efficiency level of protection. The results of the radiant heat method presented that using the Parylene C coating did not cause changes in the thermal insulation against heat radiation of all tested materials; the radiant heat transfer index reached values in the range of 12.4 - 12.9 s. X-ray tomography (micro-CT) allowed for identifying breaks/snaps in basalt fibers irritating the user’s skin in direct contact with the composite. Micro-CT results also showed that using Parylene C coating eliminated the effect of skin irritation and increased the usability of basalt fabrics in clothing.

5

Evaluation of Thermal Properties of Certain Flame-Retardant Fabrics Modified with a Magnetron Sputtering Method

80%

Miśkiewicz P. , Tokarska M. , Frydrych I. , Makówka M.

Autex Research Journal

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2021

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tom Vol. 21, no. 4

428--434

EN

The article presents the modification of flame-retardant fabric surfaces made of basalt, Nomex®, and cotton fabric to improve their selected thermal comfort properties. The modification consisted of depositing on the fabric surface by magnetron sputtering the metal (aluminum) and ceramic (zirconium (IV) oxide) coatings with a thickness of 1 μm and 5 μm. Flame-retardant fabrics have been chosen because of the desire to apply them to gloves intended for the use in hot-work environments. The article presents the results of testing reference samples and their modifications, which were subjected to the test of resistance to contact heat for contact temperatures of 100°C and 250°C, resistance to thermal radiation and examined their selected thermal comfort parameters, i.e., the thermal conductivity coefficient and heat absorption coefficient. Almost the 1st efficiency level for contact heat was reached for basalt fabric coated with zirconium (IV) oxide with a thickness of 5 μm. The 1st level of protection against heat radiation was obtained for all reference and modified samples. Based on the Kruskal–Wallis test, it was noticed that a significant change in parameter values is caused by the modification with 5 μm thick coating.