Preparation and EMI shielding performance of epoxy/non-metallic conductive fillers nano-composites
•Conductive epoxy/ non-metallic filler nanocomposites were prepared.•Low percolation threshold was achieved thanks to uniform distribution of non-metallic conductive filler.•Dielectric properties of epoxy nano composites were measured by reflection/transmission method.•EMI Shielding Effectiveness (S...
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| Veröffentlicht in: | Progress in organic coatings 2020-08, Vol.145, p.105674, Article 105674 |
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| creator | Khodadadi Yazdi, M. Noorbakhsh, B. Nazari, B. Ranjbar, Z. |
| description | •Conductive epoxy/ non-metallic filler nanocomposites were prepared.•Low percolation threshold was achieved thanks to uniform distribution of non-metallic conductive filler.•Dielectric properties of epoxy nano composites were measured by reflection/transmission method.•EMI Shielding Effectiveness (SE) was higher at high loadings of conductive fillers.•E/PANI (15 %) exhibited a relatively wide effective bandwidth of 3.6 GHz.
Nonmetallic conductive materials such as inherently conducting polymers (ICPs) and carbon nanomaterials play an important role in the manufacturing of electrically conductive polymer nanocomposites for Electromagnetic Interference (EMI) shielding applications. In this study, the electrical, dielectric and EMI shielding properties of epoxy (E)/non-metallic conductive materials are investigated. Polyaniline (PANI) as an ICP, graphene and multi-walled carbon nanotubes (MWCNTs), as the most well-known carbon nanomaterials, have been selected in order to make conductive epoxy nanocomposites. The composites were prepared through solvent mixing method and characterized by the X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) and electrical conductivity measurements. Furthermore, dielectric properties of epoxy nano composites were measured by reflection/transmission method using a vector network analyzer (VNA) in the frequency range of 8.2–12.2 GHz. It was observed that both real and imaginary parts of permittivity increase with CNT and thermally reduced graphene oxide (TRGO) loadings. Highest dielectric loss values were observed for E/PANI (35 %) composites, while dielectric constant was highest for both E/PANI (35 %) and E/TRGO (3%) nanocomposites. Furthermore, the EMI Shielding Effectiveness (SE) was higher at high loadings of conductive fillers. The maximum reflection loss was observed for E/CNT (2.5 %) and E/PANI (15 %); in fact, E/PANI (15 %) exhibited a relatively broad effective bandwidth (i.e., reflection loss |
| doi_str_mv | 10.1016/j.porgcoat.2020.105674 |
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Nonmetallic conductive materials such as inherently conducting polymers (ICPs) and carbon nanomaterials play an important role in the manufacturing of electrically conductive polymer nanocomposites for Electromagnetic Interference (EMI) shielding applications. In this study, the electrical, dielectric and EMI shielding properties of epoxy (E)/non-metallic conductive materials are investigated. Polyaniline (PANI) as an ICP, graphene and multi-walled carbon nanotubes (MWCNTs), as the most well-known carbon nanomaterials, have been selected in order to make conductive epoxy nanocomposites. The composites were prepared through solvent mixing method and characterized by the X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) and electrical conductivity measurements. Furthermore, dielectric properties of epoxy nano composites were measured by reflection/transmission method using a vector network analyzer (VNA) in the frequency range of 8.2–12.2 GHz. It was observed that both real and imaginary parts of permittivity increase with CNT and thermally reduced graphene oxide (TRGO) loadings. Highest dielectric loss values were observed for E/PANI (35 %) composites, while dielectric constant was highest for both E/PANI (35 %) and E/TRGO (3%) nanocomposites. Furthermore, the EMI Shielding Effectiveness (SE) was higher at high loadings of conductive fillers. The maximum reflection loss was observed for E/CNT (2.5 %) and E/PANI (15 %); in fact, E/PANI (15 %) exhibited a relatively broad effective bandwidth (i.e., reflection loss<-10 dB) of 3.6 GHz, while this parameter is 2.1 GHz for E/CNT (2.5 %).</description><identifier>ISSN: 0300-9440</identifier><identifier>EISSN: 1873-331X</identifier><identifier>DOI: 10.1016/j.porgcoat.2020.105674</identifier><language>eng</language><publisher>Lausanne: Elsevier B.V</publisher><subject>Carbon ; Conducting polymers ; Dielectric loss ; Dielectric properties ; Electrical resistivity ; Electromagnetic shielding ; EMI shielding ; Epoxy nano-composites ; Fillers ; Fourier transforms ; Frequency ranges ; Graphene ; Multi wall carbon nanotubes ; MWCNT ; Nanocomposites ; Nanomaterials ; Network analysers ; Permittivity ; Polyaniline ; Polyanilines ; Polymer matrix composites ; Reflection</subject><ispartof>Progress in organic coatings, 2020-08, Vol.145, p.105674, Article 105674</ispartof><rights>2020 Elsevier B.V.</rights><rights>Copyright Elsevier BV Aug 2020</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c406t-444aa0ab1df0d4904ace0c4d7027059fcebb1079ab929b8d140370fba149dda23</citedby><cites>FETCH-LOGICAL-c406t-444aa0ab1df0d4904ace0c4d7027059fcebb1079ab929b8d140370fba149dda23</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.porgcoat.2020.105674$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids></links><search><creatorcontrib>Khodadadi Yazdi, M.</creatorcontrib><creatorcontrib>Noorbakhsh, B.</creatorcontrib><creatorcontrib>Nazari, B.</creatorcontrib><creatorcontrib>Ranjbar, Z.</creatorcontrib><title>Preparation and EMI shielding performance of epoxy/non-metallic conductive fillers nano-composites</title><title>Progress in organic coatings</title><description>•Conductive epoxy/ non-metallic filler nanocomposites were prepared.•Low percolation threshold was achieved thanks to uniform distribution of non-metallic conductive filler.•Dielectric properties of epoxy nano composites were measured by reflection/transmission method.•EMI Shielding Effectiveness (SE) was higher at high loadings of conductive fillers.•E/PANI (15 %) exhibited a relatively wide effective bandwidth of 3.6 GHz.
Nonmetallic conductive materials such as inherently conducting polymers (ICPs) and carbon nanomaterials play an important role in the manufacturing of electrically conductive polymer nanocomposites for Electromagnetic Interference (EMI) shielding applications. In this study, the electrical, dielectric and EMI shielding properties of epoxy (E)/non-metallic conductive materials are investigated. Polyaniline (PANI) as an ICP, graphene and multi-walled carbon nanotubes (MWCNTs), as the most well-known carbon nanomaterials, have been selected in order to make conductive epoxy nanocomposites. The composites were prepared through solvent mixing method and characterized by the X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) and electrical conductivity measurements. Furthermore, dielectric properties of epoxy nano composites were measured by reflection/transmission method using a vector network analyzer (VNA) in the frequency range of 8.2–12.2 GHz. It was observed that both real and imaginary parts of permittivity increase with CNT and thermally reduced graphene oxide (TRGO) loadings. Highest dielectric loss values were observed for E/PANI (35 %) composites, while dielectric constant was highest for both E/PANI (35 %) and E/TRGO (3%) nanocomposites. Furthermore, the EMI Shielding Effectiveness (SE) was higher at high loadings of conductive fillers. The maximum reflection loss was observed for E/CNT (2.5 %) and E/PANI (15 %); in fact, E/PANI (15 %) exhibited a relatively broad effective bandwidth (i.e., reflection loss<-10 dB) of 3.6 GHz, while this parameter is 2.1 GHz for E/CNT (2.5 %).</description><subject>Carbon</subject><subject>Conducting polymers</subject><subject>Dielectric loss</subject><subject>Dielectric properties</subject><subject>Electrical resistivity</subject><subject>Electromagnetic shielding</subject><subject>EMI shielding</subject><subject>Epoxy nano-composites</subject><subject>Fillers</subject><subject>Fourier transforms</subject><subject>Frequency ranges</subject><subject>Graphene</subject><subject>Multi wall carbon nanotubes</subject><subject>MWCNT</subject><subject>Nanocomposites</subject><subject>Nanomaterials</subject><subject>Network analysers</subject><subject>Permittivity</subject><subject>Polyaniline</subject><subject>Polyanilines</subject><subject>Polymer matrix composites</subject><subject>Reflection</subject><issn>0300-9440</issn><issn>1873-331X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNqFkEFLAzEUhIMoWKt_QQKet33ZpLvNTSlVCxU9KHgL2eRtTdkma7IV--_dsnr29GCYmcd8hFwzmDBgxXQ7aUPcmKC7SQ75UZwVpTghIzYvecY5ez8lI-AAmRQCzslFSlsAKDiXI1K9RGx11J0Lnmpv6fJpRdOHw8Y6v6EtxjrEnfYGaagptuH7MPXBZzvsdNM4Q03wdm8694W0dk2DMVGvfchM2LUhuQ7TJTmrdZPw6veOydv98nXxmK2fH1aLu3VmBBRdJoTQGnTFbA1WSBDaIBhhS8hLmMnaYFUxKKWuZC6ruWUCeAl1pZmQ1uqcj8nN0NvG8LnH1Klt2Effv1R5P1xIlgveu4rBZWJIKWKt2uh2Oh4UA3Xkqbbqj6c68lQDzz54OwSx3_DlMKpkHPZgrItoOmWD-6_iB_3Cg8w</recordid><startdate>202008</startdate><enddate>202008</enddate><creator>Khodadadi Yazdi, M.</creator><creator>Noorbakhsh, B.</creator><creator>Nazari, B.</creator><creator>Ranjbar, Z.</creator><general>Elsevier B.V</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>202008</creationdate><title>Preparation and EMI shielding performance of epoxy/non-metallic conductive fillers nano-composites</title><author>Khodadadi Yazdi, M. ; Noorbakhsh, B. ; Nazari, B. ; Ranjbar, Z.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c406t-444aa0ab1df0d4904ace0c4d7027059fcebb1079ab929b8d140370fba149dda23</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Carbon</topic><topic>Conducting polymers</topic><topic>Dielectric loss</topic><topic>Dielectric properties</topic><topic>Electrical resistivity</topic><topic>Electromagnetic shielding</topic><topic>EMI shielding</topic><topic>Epoxy nano-composites</topic><topic>Fillers</topic><topic>Fourier transforms</topic><topic>Frequency ranges</topic><topic>Graphene</topic><topic>Multi wall carbon nanotubes</topic><topic>MWCNT</topic><topic>Nanocomposites</topic><topic>Nanomaterials</topic><topic>Network analysers</topic><topic>Permittivity</topic><topic>Polyaniline</topic><topic>Polyanilines</topic><topic>Polymer matrix composites</topic><topic>Reflection</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Khodadadi Yazdi, M.</creatorcontrib><creatorcontrib>Noorbakhsh, B.</creatorcontrib><creatorcontrib>Nazari, B.</creatorcontrib><creatorcontrib>Ranjbar, Z.</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Progress in organic coatings</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Khodadadi Yazdi, M.</au><au>Noorbakhsh, B.</au><au>Nazari, B.</au><au>Ranjbar, Z.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Preparation and EMI shielding performance of epoxy/non-metallic conductive fillers nano-composites</atitle><jtitle>Progress in organic coatings</jtitle><date>2020-08</date><risdate>2020</risdate><volume>145</volume><spage>105674</spage><pages>105674-</pages><artnum>105674</artnum><issn>0300-9440</issn><eissn>1873-331X</eissn><abstract>•Conductive epoxy/ non-metallic filler nanocomposites were prepared.•Low percolation threshold was achieved thanks to uniform distribution of non-metallic conductive filler.•Dielectric properties of epoxy nano composites were measured by reflection/transmission method.•EMI Shielding Effectiveness (SE) was higher at high loadings of conductive fillers.•E/PANI (15 %) exhibited a relatively wide effective bandwidth of 3.6 GHz.
Nonmetallic conductive materials such as inherently conducting polymers (ICPs) and carbon nanomaterials play an important role in the manufacturing of electrically conductive polymer nanocomposites for Electromagnetic Interference (EMI) shielding applications. In this study, the electrical, dielectric and EMI shielding properties of epoxy (E)/non-metallic conductive materials are investigated. Polyaniline (PANI) as an ICP, graphene and multi-walled carbon nanotubes (MWCNTs), as the most well-known carbon nanomaterials, have been selected in order to make conductive epoxy nanocomposites. The composites were prepared through solvent mixing method and characterized by the X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) and electrical conductivity measurements. Furthermore, dielectric properties of epoxy nano composites were measured by reflection/transmission method using a vector network analyzer (VNA) in the frequency range of 8.2–12.2 GHz. It was observed that both real and imaginary parts of permittivity increase with CNT and thermally reduced graphene oxide (TRGO) loadings. Highest dielectric loss values were observed for E/PANI (35 %) composites, while dielectric constant was highest for both E/PANI (35 %) and E/TRGO (3%) nanocomposites. Furthermore, the EMI Shielding Effectiveness (SE) was higher at high loadings of conductive fillers. The maximum reflection loss was observed for E/CNT (2.5 %) and E/PANI (15 %); in fact, E/PANI (15 %) exhibited a relatively broad effective bandwidth (i.e., reflection loss<-10 dB) of 3.6 GHz, while this parameter is 2.1 GHz for E/CNT (2.5 %).</abstract><cop>Lausanne</cop><pub>Elsevier B.V</pub><doi>10.1016/j.porgcoat.2020.105674</doi></addata></record> |
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| subjects | Carbon Conducting polymers Dielectric loss Dielectric properties Electrical resistivity Electromagnetic shielding EMI shielding Epoxy nano-composites Fillers Fourier transforms Frequency ranges Graphene Multi wall carbon nanotubes MWCNT Nanocomposites Nanomaterials Network analysers Permittivity Polyaniline Polyanilines Polymer matrix composites Reflection |
| title | Preparation and EMI shielding performance of epoxy/non-metallic conductive fillers nano-composites |
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