Wyniki wyszukiwania - BazTech

1

New ionic liquids based on the biguanide cation with antimicrobial properties for applications in the textile and polymer materials industries

Słubik Anna, Masłowska-Lipowicz Iwona, Wyrębska Łucja, Królikowski Bogusław, Malinowski Rafał, Bajer Krzysztof

Fibres & Textiles in Eastern Europe

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2023

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Vol. 31, no. 1

9--14

EN

The presented article describes the method of synthesizing new ionic liquid based on a biguanide cation and a tiocyanate or benzoate anion with antimicrobial properties. The structure of obtained new ionic liquid was confirmed by infrared spectroscopy. Additionally, the article describes a simple method of producing an antibacterial textile materials and PE-based film with the addition of an ionic liquid.

2

Optical Fibers in the Design and Fabrication of Smart Garments – a Review

King Raji Rafiu, Qin Luo, Ning Li, Haijin Liu

Fibres & Textiles in Eastern Europe

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2022

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Vol. 30, no. 1 (151)

31--42

EN

Several publications and even commercial products showcasing the application of optical fibers for textile goods abound in literature. Optical fibers can be employed as sensors by making use of physical principles to sense strain, temperature, and other quantities by tailoring the fiber such that the quantity to be measured alters the intensity, phase, polarisation, and wavelength of light within the fiber. However, a paper directed at the development of textile based applications or smart garments using optical fibers is lacking. This review seeks to serve as apt reference material for the development of optical fiber based textile sensors or smart garments with a focus on the application of plastic optical fibers (POFs). Highlighted are the salient material properties of POFs and their importance in delivering satisfactory sensing results. Special treatment has also been given to their proposed feasibility for embedment within weft knitted structures.

3

Device for Measurement of Static and Dynamic Air Permeability and Deformation Changes in Textile Materials

Veselá J., Kůs Z.

Fibres & Textiles in Eastern Europe

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2016

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Vol. 24, no. 1 (115)

120--126

EN

This article investigates the measuring of the air permeability of textiles. A new instrument designed to measure the air permeability of textiles is described in the article. The instrument differs from the standard devices mainly due to the components added, which enable the dynamic measurement of air permeability and give the possibility to investigate the structure of the textile tested during the process of measurement. Individual user settings are described and examples are given of how to process the data obtained. The device is operated by a control program. Contrary to the manual devices, the error introduced by the operating personnel is minimized in terms of setting up the measurement and reading the data measured. The device is controlled by a computer and the data obtained is stored in an electronic form for further processing.

PL

Praca dotyczy badania przepuszczalności powietrza płaskich wyrobów włókienniczych. Nowo opracowany przyrząd przeznaczony jest do pomiarów statycznych i dynamicznych przepływu powietrza. Przyrząd różni się od standardowych przyrządów tym, że umożliwia badanie strukturalnych zmian materiału testowanego w stanach dynamicznych. Działanie przyrządu jest kontrolowane przez program komputerowy co umożliwia wyeliminowanie błędów popełnianych przez operatora. Wyniki uzyskane za pomocą przyrządu są zachowane w pamięci komputera . W artykule przeprowadzono dokładną analizę błędów pomiaru.

4

Flammability properties of textiles coated with nanocomposites

Gieparda W., Wesołek D., Rojewski S.

Przetwórstwo Tworzyw

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2013

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[R.] 19, nr 4 (154)

340--343

EN

The aim of the research is to reduce the flammability of textile materials using a nanocomposite polymer back-coating. Montmorillonite and carbon nanotubes were introduced into the resin using an ultrasonic disintegrator and a high speed homogenizer, and then fabric was covered by the obtained composites. A homogeneous dispersion of carbon nanotubes in polyurethane resin and a polymer intercalation into the montmorillonite platelets were obtained. Coated fabrics showed a significant decrease of the maximum heat release rate, ie about 30 - 40%. Compositions with the addition of organically modified montmorillonite or with carboxylated nanotubes showed the greatest decrease in the rate of heat release.

PL

Celem badań jest ograniczenie palności materiałów włókienniczych za pomocą nanokompozytów polimerowych. Nanorurki węglowe oraz montmorylonit wprowadzano do żywicy przy użyciu dezintegratora ultradźwiękowego i homogenizatora, a następnie materiał powleczono otrzymanymi nanokompozytami. Uzyskano jednorodną dyspersję nanorurek węglowych w żywicy poliuretanowej oraz interkalację warstw montmorylonitu. Tkaniny zabezpieczone nanokompozytami wykazały obniżenie maksymalnej szybkości wydzielania ciepła o około 30 - 40%. Największy spadek szybkości wydzielania ciepła wykazały kompozycje z dodatkiem organicznie modyfikowanego montmorylonitu lub nanorurek karboksylowanych.

5

Analiza koncentracji naprężeń dla drewna wzmocnionego materiałem tekstylnym

Hufenbach W., Kroll L., Lepper M., Langkamp A., Czulak A.

Kompozyty

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2002

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R. 2, nr 5

384-389

PL

W Insitut fur Leichtbau und Kunststofftechnik (ILK) rozwinięto modele obliczeń analitycznych do opisu koncentracji naprężeń w konstrukcjach drewnianych wzmacnianych materiałem tekstylnym, wykonanym z włókien szklanych lub węglowych. Prezentowany model oparto na teorii wzmocnionego laminatu w kombinacji z metodą złożonych funkcji przemieszczeń i odwzorowań konforemnych. Pozwoliło to na uzyskanie rozwiązań naprężeń i przemieszczeń. Właściwości materiałowe konieczne do obliczeń określono w ILK w wyniku rozległych badań eksperymentalnych, z użyciem nowoczesnych technik pomiarów 3D. Ponadto, badania te przeprowadzono w celu weryfikacji wyprowadzonych rozwiązań.

EN

For the description of stress concentrations of wooden constructions with textile reinforcement made of glass or carbon fibres, analytical calculation models have been developed at the Institut fiir Leichtbau und Kunststofftechnik (ILK). The model presented here is based on the enhanced laminate theory combined with the method of complex-valued displacement functions and the method of conformal mappings. Using these, adapted solutions for the stresses and displacements are obtained. The material properties needed for the calculations are determined at the ILK within extensive experimental studies using modern optical 3D measuring techniques. Furthermore, these experiments are applied for the verification of the derived solutions.

6

Accuracy class of virtual measuring instruments for textile uses

Gniotek K., Leśnikowski J.

Zeszyty Naukowe. Włókiennictwo / Politechnika Łódzka

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2000

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z. 58

313-321

EN

Every textile material is a porous body. One of the parameters characterising its structure is the tota1 porosity, which is understood as a volume of pores in the unit volume of a porous body. There is a close relationship between the porosity of textile products and their functional qualities such as acoustic, heat-insulating, filtration quality, and the like. Hence, the need for developing a simple, non-invasive method for measuring textile material porosity. The method proposed by the authors [1] is based on the dependence of changes in the suppression of an ultrasound wave passing through a given specimen on the compressive force perpendicular to its surface, which causes the air to be pushed out of the pores. In the device proposed, the specimen to be studied is placed between the transmitting and the receiving ultrasound head and then pressed; at the same time changes in the suppression of the ultrasound wave are recorded. The character of these changes can indicate the magnitude of porosity. One of the most essential elements of the instrument is a force sensor, which bas the form of a beam with four tensometers glued to it, the beam being attached at one end. In the article, the operation of the sensor bas been ana1ysed and its accuracy class determined; in addition, some methods to improve its metrological properties, based on the LabVIEW program have been presented.