| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Unique Charge Storage Characteristics of FEP/THV/FEP Sandwich Electret Membrane Polarized by Thermally Charging Technology |
| CHEN Gang-Jin**, LEI Ming-Feng, XIAO Hui-Ming, WU Ling |
Lab of Electrets and Its Application, Hangzhou Dianzi University, Hangzhou 310018
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| Cite this article: |
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CHEN Gang-Jin, LEI Ming-Feng, XIAO Hui-Ming et al 2014 Chin. Phys. Lett. 31 127702 |
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Abstract Utilizing the synergy of three processes (space charge injection, dipole orientation and interfacial polarization) which determine the electret properties, a sandwich electret membrane FEP/THV/FEP (FEP: fluorinated ethylene propylene, THV: tetrafluoroethylene-hexafluoropropylene-vinylidene) is prepared by the laminating method and the thermal charging technology. The surface potential measurement indicates that the sandwich electret membrane exhibits excellent charge storage stability. When washing the sample surface with alcohol, its surface potential first undergoes decay to zero, and then quickly restores to a high value. The surface potential value is associated with the charging electric field and temperature. The best charging condition is 18.75 MV?m?1 and 130°C. A charge storage profile is proposed, and the experimental results are in good agreement with this profile.
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Published: 12 January 2015
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| PACS: |
77.22.-d
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(Dielectric properties of solids and liquids)
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77.22.Ej
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(Polarization and depolarization)
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73.61.Ph
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(Polymers; organic compounds)
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77.84.Jd
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(Polymers; organic compounds)
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