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Self-sensing of strain in a fiber glass/epoxy composite by built-in stripe of carbon nanotubes with Ag nanoparticles
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SYSNO ASEP 0495927 Druh ASEP A - Abstrakt Zařazení RIV O - Ostatní Název Self-sensing of strain in a fiber glass/epoxy composite by built-in stripe of carbon nanotubes with Ag nanoparticles Tvůrce(i) Slobodian, P. (CZ)
Říha, Pavel (UH-J) SAI, ORCID, RID
Olejník, R. (CZ)
Matyáš, J. (CZ)
Daňová, R. (CZ)
Schledjewski, R. (AT)Zdroj.dok. Journal of Material Sciences & Engineering, Proceedings of 19th World Congress on Materials Science and Engineering, 7. - Barcelona : OMICS International, 2018 - ISSN 2169-0022
Roč. 7, June (2018), s. 181-182Poč.str. 2 s. Forma vydání Tištěná - P Akce World Congress on Materials Science and Engineering /19./ Datum konání 11.06.2018 - 13.06.2018 Místo konání Barcelona Země ES - Španělsko Typ akce WRD Jazyk dok. eng - angličtina Země vyd. ES - Španělsko Klíč. slova carbon nanotubes ; glass fibers ; electrical properties ; deformation ; epoxy laminate Vědní obor RIV BK - Mechanika tekutin Obor OECD Nano-processes (applications on nano-scale) Institucionální podpora UH-J - RVO:67985874 CEZ AV0Z20600510 - UH-J (2005-2011) DOI 10.4172/2169-0022-C8-114 Anotace Statement of the Problem: Strain sensing composite materials have attracted considerable attention for their unique characteristics exceeding conventionally applied materials. Between different solutions and various types of transducers available for these applications, piezo-resistive strain sensors are among the most investigated ones usually based on conductive polymer composites prepared by embedding of electrically conductive fillers as carbon nanotubes into a polymeric matrix. This principle can be used for monitoring of deformation or stress stimulus in elongation or compression. The responses are sensitive and reversible with sufficient durability in the dynamic loadings measured by a macroscopic electrical resistance change. Methodology & Theoretical Orientation: In our contribution we introduce a strain sensing composite material composed of electrically conductive entangled network of Ag decorated multiwalled carbon nanotubes (MWCNTs) integrated into the glass fiber/epoxy composite. A vacuum infusion technique was used for the composite fabrication. The experimental results revealed that an integrated strain sensing exhibit long term electromechanical stability which was linked to the level of strain in the host glass fiber/epoxy structure. It has been proven that modification of pristine MWCNTs with Ag nanoparticles increase the sensitivity to applied strain. Simultaneously pre-strain stimulation was also applied to further enhance detection ability. The resistance sensitivity, quantified by a gauge factor, increased more than hundredfold for a pre-strained sensor with Ag decorated nanotubes in comparison with the value of about 5 for sensor with pristine nanotubes. This is a substantial increase which ranks this new material among strain gauges with the highest electromechanical sensitivity. The obtained data indicated also a reasonable stability of the measurement with no effect of load alterations on the sensor resistance changes. Additionally, the thermoelectric properties, Joule heating and antennal signal reception by MWCNT stripe will be mentioned. Pracoviště Ústav pro hydrodynamiku Kontakt Soňa Hnilicová, hnilicova@ih.cas.cz, Tel.: 233 109 003 Rok sběru 2019
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