Wyniki wyszukiwania - BazTech

1

Aging of Polypyrrole Coated Fabrics Potted in Epoxy

Banaszczyk J, Rybak A, Odziomek M

Fibres & Textiles in Eastern Europe

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2015

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Vol. 23, no. 2 (110)

79--83

EN

In this article the high temperature aging of epoxy pottedpolypyrrole coated polyester/nylon fabrics was investigated in order to assess whether they can be used in applications where temperature evaluation is common. A comparative analysis of various types of conductive fabrics was performed, including both woven and nonwoven, which were potted in epoxy resin and subjected to thermal aging. The results were compared with those obtained for polyimide/carbon ink coated quartz woven high temperature fabric. The results of the measurements were successfully approximated with analytical aging curves.

PL

W pracy przeanalizowano wpływ wysokiej temperatury na obniżenie przewodności elektrycznej tekstyliów powlekanych polipyrolem, w celu oceny ich przydatności w zastosowaniach wysokotemperaturowych. Przeprowadzono analizę komparatywną dla różnych rodzajów tekstyliów przewodzących, takich jak tkaniny o różnym splocie i włókniny, które wcześniej poddano szczelnemu pokryciu żywicą epoksydową, a następnie starzeniu termicznemu. Wyniki porównano z rezultatami uzyskanymi dla tkaniny kwarcowej powlekanej przewodzącym kompozytem na bazie poliimidu i sadzy, przeznaczonej do zastosowań wysokotemperaturowych. Do zmierzonych wartości resystancji powierzchniowej starzonych tekstyliów dopasowano skutecznie analityczne krzywe starzenia.

2

Synthesis of polypyrrole nanotubes and fabrication of xanthine oxidase electrode

Miao Y., Wu X., Chen J.

Chemia Analityczna

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2005

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Vol. 50, No. 3

507-515

EN

Polypyrrole nanotube films capable of accommodating a large amount of enzyme have been synthesised and characterised. These nanotubes provide large enzyme-substrate contact area within a small volume. Enzyme electrode for the detection of xanthine was constructed by electrochemical immobilisation of xanthine oxidase in polypyrrole nanotube film. The obtained electrode provided fast and linear amperometric response towards xan- " thine within its concentration range from 0.01 mmol L-1 to 1.0 mmol L-1.

PL

Zsyntetyzowano i scharakteryzowano nanorurki z polipyrolu posiadające zdolność do wchłonięcia dużej ilości enzymu. Unieruchomienie oksydazy ksantynowej w takich rurkach umożliwiło skonstruowanie enzymatycznej elektrody do oznaczania ksantyny. Otrzymana elektroda dawała szybką, liniową odpowiedź amperometryczną w obecności ksantyny o stężeniu od 0,01 do l,O mmol L-1.

3

Electrical properties of conductive polymers: pet - nanocomposites’ fibres

Kim B., Koncar V., Devaux E.

Autex Research Journal

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2004

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Vol. 4, no. 1

9--13

EN

Researches in the field of conductive polym ers have attracted considerable attention for more then 20 years. Among the conductive polymers, polyaniline and polypyrrole have drawn considerable interest because of their economical importance, good environmental stability and satisfactory electrical conductivity when doped. On the other hand, electrically conductive materials such as aluminium powder, graphite and carbon nanotubes have very interesting conductive properties and are promising in the synthesis of new composite conductive materials. In almost all studies, conducting polymer films are developed and then electrical and mechanical properties are tested. In our paper, the conducting polymer fibres have been obtained by melt mixing and chemical coating on the fibres. Different conductive materials have been used in order to obtain conductive polypropylene-based fibres with specific electrical and mechanical properties. The electric conductivity and morphol ogical characteristics of these fibres have been investigated and the results are discussed. The originality of our approach lies in our having created conductive fibres based on conductive polymers. These fibres are intended for use in creating conductive yarns and realising connections in smart clothing, or producing conductive fabrics which can be used as electromagnetic shields. These developments have been carried out in order to create new multifunctional textile structures for different applications in the field of intelligent and communication apparel or other similar branches.

4

Potentiometric properties of polypyrrole films dopped with calmagite

Nybäck A.-S., Ivaska A., Lewenstam A.

Chemia Analityczna

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1999

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Vol. 44, No. 3A

405-416

EN

Electrochemically deposited polypyrrole films doped with calmagite, a multivalent complexing ligand, has been studied. The tilms were deposited on a platinum substrate by using cyclic voltammetry. Calmagite was incorporated in the polymer matrix during polymerisation. Calmagite belongs to the group of metallochromic indicators and form.5 complexes with calcium, magnesium and copper. By using calmagite as doping ion the sensitivity of the film towards these specific cations is enhanced. This was checked by measuring the potentiometric response of the films. As the complexation between calmagite and the metal ions is pH dependent the proper pH range had to be used to obtain good potentiometric response of the films. EDAX spectroscopy was used to get further information about the complexation.

PL

Badano osadzone elektrochemicznie na platynie i domieszkowane kalmagitem cienkie warstwy polipyrolu Kalmagit wbudowywał się w warstwę polimeru w czasie polimeryzacji metodą cyklicznej woltamperometrii. Zaobserwowano wzrost czułości potencjometrycznej otrzymanych warstw polipyrolu w sto.5unku do jonów wapnia, magnezu i miedzi, które .są kompleksowane przez kalmagit. Dobre zależności potencjometryczne otrzymano w ograniczonym przedziale pH. Spektroskopia EDAX pozwoliła na udokumentowanie oddziaływań kalgamitu z jonami metali.