Dielectric properties of nanosilica/low-density polyethylene composites: The surface chemistry of nanoparticles and deep traps induced by nanoparticles
Four kinds of nanosilica particles with different surface modification were employed to fabricate low-density polyethylene (LDPE) composites using melt mixing and hot molding methods. The surface chemistry of modified nanosilica was analyzed by X-ray photoelectron spectroscopy. All silica nanopartic...
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| Format: | Article |
| Language: | English |
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Budapest University of Technology and Economics
2014-09-01
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| Series: | eXPRESS Polymer Letters |
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| Online Access: | http://www.expresspolymlett.com/letolt.php?file=EPL-0005257&mi=cd |
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| author | S. Ju M. Chen H. Zhang Z. Zhang |
| author_facet | S. Ju M. Chen H. Zhang Z. Zhang |
| author_sort | S. Ju |
| collection | DOAJ |
| description | Four kinds of nanosilica particles with different surface modification were employed to fabricate low-density polyethylene (LDPE) composites using melt mixing and hot molding methods. The surface chemistry of modified nanosilica was analyzed by X-ray photoelectron spectroscopy. All silica nanoparticles were found to suppress the space charge injection and accumulation, increase the volume resistivity, decrease the permittivity and dielectric loss factor at low frequencies, and decrease the dielectric breakdown strength of the LDPE polymers. The modified nanoparticles, in general, showed better dielectric properties than the unmodified ones. It was found that the carrier mobility, calculated from J–V curves using the Mott-Gurney equation, was much lower for the nanocomposites than for the neat LDPE. |
| format | Article |
| id | doaj-art-111a978a7eda45f0accdae38542259d1 |
| institution | Kabale University |
| issn | 1788-618X |
| language | English |
| publishDate | 2014-09-01 |
| publisher | Budapest University of Technology and Economics |
| record_format | Article |
| series | eXPRESS Polymer Letters |
| spelling | doaj-art-111a978a7eda45f0accdae38542259d12025-08-20T03:32:55ZengBudapest University of Technology and EconomicseXPRESS Polymer Letters1788-618X2014-09-018968269110.3144/expresspolymlett.2014.71Dielectric properties of nanosilica/low-density polyethylene composites: The surface chemistry of nanoparticles and deep traps induced by nanoparticlesS. JuM. ChenH. ZhangZ. ZhangFour kinds of nanosilica particles with different surface modification were employed to fabricate low-density polyethylene (LDPE) composites using melt mixing and hot molding methods. The surface chemistry of modified nanosilica was analyzed by X-ray photoelectron spectroscopy. All silica nanoparticles were found to suppress the space charge injection and accumulation, increase the volume resistivity, decrease the permittivity and dielectric loss factor at low frequencies, and decrease the dielectric breakdown strength of the LDPE polymers. The modified nanoparticles, in general, showed better dielectric properties than the unmodified ones. It was found that the carrier mobility, calculated from J–V curves using the Mott-Gurney equation, was much lower for the nanocomposites than for the neat LDPE.http://www.expresspolymlett.com/letolt.php?file=EPL-0005257&mi=cdNanocompositespolyethyleneinsulation propertypulsed electroacousticcarrier mobility |
| spellingShingle | S. Ju M. Chen H. Zhang Z. Zhang Dielectric properties of nanosilica/low-density polyethylene composites: The surface chemistry of nanoparticles and deep traps induced by nanoparticles eXPRESS Polymer Letters Nanocomposites polyethylene insulation property pulsed electroacoustic carrier mobility |
| title | Dielectric properties of nanosilica/low-density polyethylene composites: The surface chemistry of nanoparticles and deep traps induced by nanoparticles |
| title_full | Dielectric properties of nanosilica/low-density polyethylene composites: The surface chemistry of nanoparticles and deep traps induced by nanoparticles |
| title_fullStr | Dielectric properties of nanosilica/low-density polyethylene composites: The surface chemistry of nanoparticles and deep traps induced by nanoparticles |
| title_full_unstemmed | Dielectric properties of nanosilica/low-density polyethylene composites: The surface chemistry of nanoparticles and deep traps induced by nanoparticles |
| title_short | Dielectric properties of nanosilica/low-density polyethylene composites: The surface chemistry of nanoparticles and deep traps induced by nanoparticles |
| title_sort | dielectric properties of nanosilica low density polyethylene composites the surface chemistry of nanoparticles and deep traps induced by nanoparticles |
| topic | Nanocomposites polyethylene insulation property pulsed electroacoustic carrier mobility |
| url | http://www.expresspolymlett.com/letolt.php?file=EPL-0005257&mi=cd |
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