Self-Sensing Carbon Nanotube Composites Exposed to Glass Transition Temperature
This paper reported the effect of high temperature on the electro-mechanical behavior of carbon nanotube (CNT) reinforced epoxy composites. CNT/epoxy composites were fabricated by dispersing CNTs in the epoxy matrix using a solution casting method. Electrical conductivity measurements obtained for t...
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| description | This paper reported the effect of high temperature on the electro-mechanical behavior of carbon nanotube (CNT) reinforced epoxy composites. CNT/epoxy composites were fabricated by dispersing CNTs in the epoxy matrix using a solution casting method. Electrical conductivity measurements obtained for the CNT/epoxy composites indicated a steadily increasing directly proportional relationship with CNT concentration with a percolation threshold at 0.25 wt %, reaching a maximum of up to 0.01 S/m at 2.00 wt % CNTs. The electro-mechanical behavior of CNT/epoxy composites were investigated at a room temperature under the static and cyclic compressive loadings, resulting that the change in resistance of CNT/epoxy composites was reduced as increasing CNT concentration with good repeatability. This is due to well-networked CNTs conducting pathways created within the solid epoxy matrix observed by scanning electron microscopy. Temperature significantly affects the electro-mechanical behavior of CNT/epoxy composites. In particular, the electro-mechanical behavior of CNT/epoxy composites below the glass transition temperature showed the similar trend with those at room temperature, whereas the electro-mechanical behavior of CNT/epoxy composites above the glass transition temperature showed an opposite change in resistance with poor repeatability due to unstable CNT network in epoxy matrix. |
| doi_str_mv | 10.3390/ma13020259 |
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CNT/epoxy composites were fabricated by dispersing CNTs in the epoxy matrix using a solution casting method. Electrical conductivity measurements obtained for the CNT/epoxy composites indicated a steadily increasing directly proportional relationship with CNT concentration with a percolation threshold at 0.25 wt %, reaching a maximum of up to 0.01 S/m at 2.00 wt % CNTs. The electro-mechanical behavior of CNT/epoxy composites were investigated at a room temperature under the static and cyclic compressive loadings, resulting that the change in resistance of CNT/epoxy composites was reduced as increasing CNT concentration with good repeatability. This is due to well-networked CNTs conducting pathways created within the solid epoxy matrix observed by scanning electron microscopy. Temperature significantly affects the electro-mechanical behavior of CNT/epoxy composites. In particular, the electro-mechanical behavior of CNT/epoxy composites below the glass transition temperature showed the similar trend with those at room temperature, whereas the electro-mechanical behavior of CNT/epoxy composites above the glass transition temperature showed an opposite change in resistance with poor repeatability due to unstable CNT network in epoxy matrix.</description><identifier>ISSN: 1996-1944</identifier><identifier>EISSN: 1996-1944</identifier><identifier>DOI: 10.3390/ma13020259</identifier><identifier>PMID: 31936072</identifier><language>eng</language><publisher>Switzerland: MDPI AG</publisher><subject>Carbon ; Carbon nanotubes ; Composite materials ; Electrical resistivity ; Epoxy matrix composites ; Epoxy resins ; Glass transition temperature ; High temperature effects ; Mechanical properties ; Nanocomposites ; Percolation ; Reproducibility ; Room temperature ; Viscosity</subject><ispartof>Materials, 2020-01, Vol.13 (2), p.259</ispartof><rights>2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><rights>2020 by the authors. 2020</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c406t-f0efe9425224cca1eb8ab8b58c354bfb13a587996e95ecde6c12a2f9120148a53</citedby><cites>FETCH-LOGICAL-c406t-f0efe9425224cca1eb8ab8b58c354bfb13a587996e95ecde6c12a2f9120148a53</cites><orcidid>0000-0001-7033-8136</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC7014453/pdf/$$EPDF$$P50$$Gpubmedcentral$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC7014453/$$EHTML$$P50$$Gpubmedcentral$$Hfree_for_read</linktohtml><link.rule.ids>230,314,727,780,784,885,27924,27925,53791,53793</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/31936072$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Jang, Sung-Hwan</creatorcontrib><creatorcontrib>Li, Long-Yuan</creatorcontrib><title>Self-Sensing Carbon Nanotube Composites Exposed to Glass Transition Temperature</title><title>Materials</title><addtitle>Materials (Basel)</addtitle><description>This paper reported the effect of high temperature on the electro-mechanical behavior of carbon nanotube (CNT) reinforced epoxy composites. CNT/epoxy composites were fabricated by dispersing CNTs in the epoxy matrix using a solution casting method. Electrical conductivity measurements obtained for the CNT/epoxy composites indicated a steadily increasing directly proportional relationship with CNT concentration with a percolation threshold at 0.25 wt %, reaching a maximum of up to 0.01 S/m at 2.00 wt % CNTs. The electro-mechanical behavior of CNT/epoxy composites were investigated at a room temperature under the static and cyclic compressive loadings, resulting that the change in resistance of CNT/epoxy composites was reduced as increasing CNT concentration with good repeatability. This is due to well-networked CNTs conducting pathways created within the solid epoxy matrix observed by scanning electron microscopy. Temperature significantly affects the electro-mechanical behavior of CNT/epoxy composites. In particular, the electro-mechanical behavior of CNT/epoxy composites below the glass transition temperature showed the similar trend with those at room temperature, whereas the electro-mechanical behavior of CNT/epoxy composites above the glass transition temperature showed an opposite change in resistance with poor repeatability due to unstable CNT network in epoxy matrix.</description><subject>Carbon</subject><subject>Carbon nanotubes</subject><subject>Composite materials</subject><subject>Electrical resistivity</subject><subject>Epoxy matrix composites</subject><subject>Epoxy resins</subject><subject>Glass transition temperature</subject><subject>High temperature effects</subject><subject>Mechanical properties</subject><subject>Nanocomposites</subject><subject>Percolation</subject><subject>Reproducibility</subject><subject>Room temperature</subject><subject>Viscosity</subject><issn>1996-1944</issn><issn>1996-1944</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNpdkU9LAzEQxYMoWmovfgBZ8CLCav5uk4sgpVah2EPrOWTT2bqyu6nJrui3N9Jaq3OZgfnN4w0PoTOCrxlT-KY2hGGKqVAHqEeUylKiOD_cm0_QIIRXHIsxIqk6RieMKJbhIe2h2RyqIp1DE8pmlYyMz12TPJnGtV0OycjVaxfKFkIy_ogTLJPWJZPKhJAsvIlHbRn5BdRr8KbtPJyio8JUAQbb3kfP9-PF6CGdziaPo7tpajnO2rTAUIDiVFDKrTUEcmlymQtpmeB5kRNmhBzGD0AJsEvILKGGFopQTLg0gvXR7UZ33eU1LC00rTeVXvuyNv5TO1Pqv5umfNEr966HUYALFgUutwLevXUQWl2XwUJVmQZcFzRlTCopsZARvfiHvrrON_E9TQWXGc8wJZG62lDWuxA8FDszBOvvqPRvVBE-37e_Q3-CYV_GcI77</recordid><startdate>20200107</startdate><enddate>20200107</enddate><creator>Jang, Sung-Hwan</creator><creator>Li, Long-Yuan</creator><general>MDPI AG</general><general>MDPI</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>JG9</scope><scope>KB.</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>7X8</scope><scope>5PM</scope><orcidid>https://orcid.org/0000-0001-7033-8136</orcidid></search><sort><creationdate>20200107</creationdate><title>Self-Sensing Carbon Nanotube Composites Exposed to Glass Transition Temperature</title><author>Jang, Sung-Hwan ; Li, Long-Yuan</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c406t-f0efe9425224cca1eb8ab8b58c354bfb13a587996e95ecde6c12a2f9120148a53</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Carbon</topic><topic>Carbon nanotubes</topic><topic>Composite materials</topic><topic>Electrical resistivity</topic><topic>Epoxy matrix composites</topic><topic>Epoxy resins</topic><topic>Glass transition temperature</topic><topic>High temperature effects</topic><topic>Mechanical properties</topic><topic>Nanocomposites</topic><topic>Percolation</topic><topic>Reproducibility</topic><topic>Room temperature</topic><topic>Viscosity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Jang, Sung-Hwan</creatorcontrib><creatorcontrib>Li, Long-Yuan</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Materials Science Collection</collection><collection>ProQuest Central Korea</collection><collection>SciTech Premium Collection</collection><collection>Materials Research Database</collection><collection>Materials Science Database</collection><collection>Materials Science Collection</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>MEDLINE - Academic</collection><collection>PubMed Central (Full Participant titles)</collection><jtitle>Materials</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Jang, Sung-Hwan</au><au>Li, Long-Yuan</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Self-Sensing Carbon Nanotube Composites Exposed to Glass Transition Temperature</atitle><jtitle>Materials</jtitle><addtitle>Materials (Basel)</addtitle><date>2020-01-07</date><risdate>2020</risdate><volume>13</volume><issue>2</issue><spage>259</spage><pages>259-</pages><issn>1996-1944</issn><eissn>1996-1944</eissn><abstract>This paper reported the effect of high temperature on the electro-mechanical behavior of carbon nanotube (CNT) reinforced epoxy composites. CNT/epoxy composites were fabricated by dispersing CNTs in the epoxy matrix using a solution casting method. Electrical conductivity measurements obtained for the CNT/epoxy composites indicated a steadily increasing directly proportional relationship with CNT concentration with a percolation threshold at 0.25 wt %, reaching a maximum of up to 0.01 S/m at 2.00 wt % CNTs. The electro-mechanical behavior of CNT/epoxy composites were investigated at a room temperature under the static and cyclic compressive loadings, resulting that the change in resistance of CNT/epoxy composites was reduced as increasing CNT concentration with good repeatability. This is due to well-networked CNTs conducting pathways created within the solid epoxy matrix observed by scanning electron microscopy. Temperature significantly affects the electro-mechanical behavior of CNT/epoxy composites. In particular, the electro-mechanical behavior of CNT/epoxy composites below the glass transition temperature showed the similar trend with those at room temperature, whereas the electro-mechanical behavior of CNT/epoxy composites above the glass transition temperature showed an opposite change in resistance with poor repeatability due to unstable CNT network in epoxy matrix.</abstract><cop>Switzerland</cop><pub>MDPI AG</pub><pmid>31936072</pmid><doi>10.3390/ma13020259</doi><orcidid>https://orcid.org/0000-0001-7033-8136</orcidid><oa>free_for_read</oa></addata></record> |
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| source | Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; PubMed Central Open Access; MDPI - Multidisciplinary Digital Publishing Institute; PubMed Central; Free Full-Text Journals in Chemistry |
| subjects | Carbon Carbon nanotubes Composite materials Electrical resistivity Epoxy matrix composites Epoxy resins Glass transition temperature High temperature effects Mechanical properties Nanocomposites Percolation Reproducibility Room temperature Viscosity |
| title | Self-Sensing Carbon Nanotube Composites Exposed to Glass Transition Temperature |
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