The effect of filler aspect ratio on the electromagnetic properties of carbon-nanofibers reinforced composites
The effect of filler aspect ratio on the electromagnetic properties of epoxy-amine resin reinforced with carbon nanofibers is here investigated. A heat treatment at 2500 °C of carbon nanofibers seems to increase their aspect ratio with respect to as-received ones most likely due to a lowering of str...
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creator | De Vivo, B. Lamberti, P. Spinelli, G. Tucci, V. Guadagno, L. Raimondo, M. |
description | The effect of filler aspect ratio on the electromagnetic properties of epoxy-amine resin reinforced with carbon nanofibers is here investigated. A heat treatment at 2500 °C of carbon nanofibers seems to increase their aspect ratio with respect to as-received ones most likely due to a lowering of structural defects and the improvement of the graphene layers within the dixie cup conformation. These morphological differences revealed by Raman's spectroscopy and scanning electron microscopy analyses may be responsible for the different electrical properties of the resulting composites. The DC characterization of the nanofilled material highlights an higher electrical conductivity and a lower electrical percolation threshold for the heat-treated carbon nanofibers based composites. In fact, the electrical conductivity is about 0.107 S/m and 1.36 × 10−3 S/m for the nanocomposites reinforced with heat-treated and as received fibers, respectively, at 1 wt. % of nanofiller loading, while the electrical percolation threshold falls in the range [0.05–0.32]wt. % for the first nanocomposites and above 0.64 wt. % for the latter. Moreover, also a different frequency response is observed since the critical frequency, which is indicative of the transition from a resistive to a capacitive-type behaviour, shifts forward of about one decade at the same filler loading. The experimental results are supported by theoretical and simulation studies focused on the role of the filler aspect ratio on the electrical properties of the nanocomposites. |
doi_str_mv | 10.1063/1.4928317 |
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A heat treatment at 2500 °C of carbon nanofibers seems to increase their aspect ratio with respect to as-received ones most likely due to a lowering of structural defects and the improvement of the graphene layers within the dixie cup conformation. These morphological differences revealed by Raman's spectroscopy and scanning electron microscopy analyses may be responsible for the different electrical properties of the resulting composites. The DC characterization of the nanofilled material highlights an higher electrical conductivity and a lower electrical percolation threshold for the heat-treated carbon nanofibers based composites. In fact, the electrical conductivity is about 0.107 S/m and 1.36 × 10−3 S/m for the nanocomposites reinforced with heat-treated and as received fibers, respectively, at 1 wt. % of nanofiller loading, while the electrical percolation threshold falls in the range [0.05–0.32]wt. % for the first nanocomposites and above 0.64 wt. % for the latter. Moreover, also a different frequency response is observed since the critical frequency, which is indicative of the transition from a resistive to a capacitive-type behaviour, shifts forward of about one decade at the same filler loading. The experimental results are supported by theoretical and simulation studies focused on the role of the filler aspect ratio on the electrical properties of the nanocomposites.</description><identifier>ISSN: 0021-8979</identifier><identifier>EISSN: 1089-7550</identifier><identifier>DOI: 10.1063/1.4928317</identifier><language>eng</language><publisher>Melville: American Institute of Physics</publisher><subject>AMINES ; Applied physics ; ASPECT RATIO ; Carbon fibers ; CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ; CRITICAL FREQUENCY ; DEFECTS ; ELECTRIC CONDUCTIVITY ; Electrical properties ; Electrical resistivity ; Electromagnetic properties ; EPOXIDES ; FIBERS ; Frequency response ; GRAPHENE ; Heat treatment ; HEAT TREATMENTS ; MATERIALS SCIENCE ; NANOCOMPOSITES ; Nanofibers ; Percolation ; RAMAN SPECTROSCOPY ; REINFORCED MATERIALS ; RESINS ; SCANNING ELECTRON MICROSCOPY ; SIMULATION</subject><ispartof>Journal of applied physics, 2015-08, Vol.118 (6)</ispartof><rights>2015 AIP Publishing LLC.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c285t-1060c118a6f1852cf42818cf16c1ab7e55dba1ae7ca216a6ab0cce6ad2098fb23</citedby><cites>FETCH-LOGICAL-c285t-1060c118a6f1852cf42818cf16c1ab7e55dba1ae7ca216a6ab0cce6ad2098fb23</cites><orcidid>0000-0002-3952-5256</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,776,780,881,27901,27902</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/22494726$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>De Vivo, B.</creatorcontrib><creatorcontrib>Lamberti, P.</creatorcontrib><creatorcontrib>Spinelli, G.</creatorcontrib><creatorcontrib>Tucci, V.</creatorcontrib><creatorcontrib>Guadagno, L.</creatorcontrib><creatorcontrib>Raimondo, M.</creatorcontrib><title>The effect of filler aspect ratio on the electromagnetic properties of carbon-nanofibers reinforced composites</title><title>Journal of applied physics</title><description>The effect of filler aspect ratio on the electromagnetic properties of epoxy-amine resin reinforced with carbon nanofibers is here investigated. A heat treatment at 2500 °C of carbon nanofibers seems to increase their aspect ratio with respect to as-received ones most likely due to a lowering of structural defects and the improvement of the graphene layers within the dixie cup conformation. These morphological differences revealed by Raman's spectroscopy and scanning electron microscopy analyses may be responsible for the different electrical properties of the resulting composites. The DC characterization of the nanofilled material highlights an higher electrical conductivity and a lower electrical percolation threshold for the heat-treated carbon nanofibers based composites. In fact, the electrical conductivity is about 0.107 S/m and 1.36 × 10−3 S/m for the nanocomposites reinforced with heat-treated and as received fibers, respectively, at 1 wt. % of nanofiller loading, while the electrical percolation threshold falls in the range [0.05–0.32]wt. % for the first nanocomposites and above 0.64 wt. % for the latter. Moreover, also a different frequency response is observed since the critical frequency, which is indicative of the transition from a resistive to a capacitive-type behaviour, shifts forward of about one decade at the same filler loading. The experimental results are supported by theoretical and simulation studies focused on the role of the filler aspect ratio on the electrical properties of the nanocomposites.</description><subject>AMINES</subject><subject>Applied physics</subject><subject>ASPECT RATIO</subject><subject>Carbon fibers</subject><subject>CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS</subject><subject>CRITICAL FREQUENCY</subject><subject>DEFECTS</subject><subject>ELECTRIC CONDUCTIVITY</subject><subject>Electrical properties</subject><subject>Electrical resistivity</subject><subject>Electromagnetic properties</subject><subject>EPOXIDES</subject><subject>FIBERS</subject><subject>Frequency response</subject><subject>GRAPHENE</subject><subject>Heat treatment</subject><subject>HEAT TREATMENTS</subject><subject>MATERIALS SCIENCE</subject><subject>NANOCOMPOSITES</subject><subject>Nanofibers</subject><subject>Percolation</subject><subject>RAMAN SPECTROSCOPY</subject><subject>REINFORCED MATERIALS</subject><subject>RESINS</subject><subject>SCANNING ELECTRON MICROSCOPY</subject><subject>SIMULATION</subject><issn>0021-8979</issn><issn>1089-7550</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNpFkM1LAzEQxYMoWKsH_4OAJw9bM9mv7FGKX1DwUs8hO53YlG2yJunB_94tLXgaePxm5r3H2D2IBYimfIJF1UlVQnvBZiBUV7R1LS7ZTAgJhera7prdpLQTAkCV3Yz59ZY4WUuYebDcumGgyE0aj0I02QUePM9HaJikGPbm21N2yMcYRorZUTouool98IU3PljXU0w8kvM2RKQNx7AfQ3KZ0i27smZIdHeec_b1-rJevherz7eP5fOqQKnqXExRBE4OTWNB1RJtJRUotNAgmL6lut70Bgy1aCQ0pjG9QKTGbKTolO1lOWcPp7shZacTTr9xi8H7KYOWsuqqVjb_1JTl50Ap6104RD8Z0xJkBaISCibq8URhDClFsnqMbm_irwahj6Vr0OfSyz_AP3UK</recordid><startdate>20150814</startdate><enddate>20150814</enddate><creator>De Vivo, B.</creator><creator>Lamberti, P.</creator><creator>Spinelli, G.</creator><creator>Tucci, V.</creator><creator>Guadagno, L.</creator><creator>Raimondo, M.</creator><general>American Institute of Physics</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>OTOTI</scope><orcidid>https://orcid.org/0000-0002-3952-5256</orcidid></search><sort><creationdate>20150814</creationdate><title>The effect of filler aspect ratio on the electromagnetic properties of carbon-nanofibers reinforced composites</title><author>De Vivo, B. ; Lamberti, P. ; Spinelli, G. ; Tucci, V. ; Guadagno, L. ; Raimondo, M.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c285t-1060c118a6f1852cf42818cf16c1ab7e55dba1ae7ca216a6ab0cce6ad2098fb23</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>AMINES</topic><topic>Applied physics</topic><topic>ASPECT RATIO</topic><topic>Carbon fibers</topic><topic>CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS</topic><topic>CRITICAL FREQUENCY</topic><topic>DEFECTS</topic><topic>ELECTRIC CONDUCTIVITY</topic><topic>Electrical properties</topic><topic>Electrical resistivity</topic><topic>Electromagnetic properties</topic><topic>EPOXIDES</topic><topic>FIBERS</topic><topic>Frequency response</topic><topic>GRAPHENE</topic><topic>Heat treatment</topic><topic>HEAT TREATMENTS</topic><topic>MATERIALS SCIENCE</topic><topic>NANOCOMPOSITES</topic><topic>Nanofibers</topic><topic>Percolation</topic><topic>RAMAN SPECTROSCOPY</topic><topic>REINFORCED MATERIALS</topic><topic>RESINS</topic><topic>SCANNING ELECTRON MICROSCOPY</topic><topic>SIMULATION</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>De Vivo, B.</creatorcontrib><creatorcontrib>Lamberti, P.</creatorcontrib><creatorcontrib>Spinelli, G.</creatorcontrib><creatorcontrib>Tucci, V.</creatorcontrib><creatorcontrib>Guadagno, L.</creatorcontrib><creatorcontrib>Raimondo, M.</creatorcontrib><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>OSTI.GOV</collection><jtitle>Journal of applied physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>De Vivo, B.</au><au>Lamberti, P.</au><au>Spinelli, G.</au><au>Tucci, V.</au><au>Guadagno, L.</au><au>Raimondo, M.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The effect of filler aspect ratio on the electromagnetic properties of carbon-nanofibers reinforced composites</atitle><jtitle>Journal of applied physics</jtitle><date>2015-08-14</date><risdate>2015</risdate><volume>118</volume><issue>6</issue><issn>0021-8979</issn><eissn>1089-7550</eissn><abstract>The effect of filler aspect ratio on the electromagnetic properties of epoxy-amine resin reinforced with carbon nanofibers is here investigated. A heat treatment at 2500 °C of carbon nanofibers seems to increase their aspect ratio with respect to as-received ones most likely due to a lowering of structural defects and the improvement of the graphene layers within the dixie cup conformation. These morphological differences revealed by Raman's spectroscopy and scanning electron microscopy analyses may be responsible for the different electrical properties of the resulting composites. The DC characterization of the nanofilled material highlights an higher electrical conductivity and a lower electrical percolation threshold for the heat-treated carbon nanofibers based composites. In fact, the electrical conductivity is about 0.107 S/m and 1.36 × 10−3 S/m for the nanocomposites reinforced with heat-treated and as received fibers, respectively, at 1 wt. % of nanofiller loading, while the electrical percolation threshold falls in the range [0.05–0.32]wt. % for the first nanocomposites and above 0.64 wt. % for the latter. Moreover, also a different frequency response is observed since the critical frequency, which is indicative of the transition from a resistive to a capacitive-type behaviour, shifts forward of about one decade at the same filler loading. The experimental results are supported by theoretical and simulation studies focused on the role of the filler aspect ratio on the electrical properties of the nanocomposites.</abstract><cop>Melville</cop><pub>American Institute of Physics</pub><doi>10.1063/1.4928317</doi><orcidid>https://orcid.org/0000-0002-3952-5256</orcidid></addata></record> |
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subjects | AMINES Applied physics ASPECT RATIO Carbon fibers CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS CRITICAL FREQUENCY DEFECTS ELECTRIC CONDUCTIVITY Electrical properties Electrical resistivity Electromagnetic properties EPOXIDES FIBERS Frequency response GRAPHENE Heat treatment HEAT TREATMENTS MATERIALS SCIENCE NANOCOMPOSITES Nanofibers Percolation RAMAN SPECTROSCOPY REINFORCED MATERIALS RESINS SCANNING ELECTRON MICROSCOPY SIMULATION |
title | The effect of filler aspect ratio on the electromagnetic properties of carbon-nanofibers reinforced composites |
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