Electrostatic investigation of charged nanoporous electret materials

Author

Liu, Wen-Liang ; Chiang, Dar-Ming ; Chen, Jen-Luan ; Susuki, Ryoichi

Author_Institution

Mater. Res. Labs., Ind. Technol. Res. Inst., Hsinchu, Taiwan

fYear

2005

fDate

11-14 Sept. 2005

Firstpage

35

Lastpage

38

Abstract

The electret properties of nano and/or meso porous fluoropolymer mats and films, fabricated by impregnation and super-critical fluids (SCFs) method and charged by the corona method at ambient environment, are investigated. Positron annihilation lifetime spectroscopy (PALS) and small angle X-ray scattering (SAXS) are applied to study the charge characteristics of a free volume of electret polymeric materials. The topography and surface charges of electret polymeric materials are studied by electric field microscopy (EFM). The experimental results reveal that the nanopores and/or mesopores of the electret polymeric materials influence the retention and stability of charge. Aged surface charges were enhanced by more than ten times from comparisons with and without fluoro-polymer impregnation of the PP mat.

Keywords

X-ray scattering; corona; electrets; nanoporous materials; polymer films; positron annihilation; surface charging; charged nanoporous electret materials; corona method; electret polymeric materials; electret properties; electric field microscopy; electrostatic investigation; fluoropolymer impregnation method; free volume; mesoporous fluoropolymer films; mesoporous fluoropolymer mats; microscopic topography; positron annihilation lifetime spectroscopy; small angle X-ray scattering; super-critical fluids method; surface charges; Corona; Electrets; Electrostatics; Mesoporous materials; Nanoporous materials; Polymers; Positrons; Spectroscopy; Surface topography; X-ray scattering;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrets, 2005. ISE-12. 2005 12th International Symposium on

Print_ISBN

0-7803-9116-0

Type

conf

DOI

10.1109/ISE.2005.1612312

Filename

1612312