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Investigation on charge deterioratio...

Kim, Jooyoun.

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Investigation on charge deterioration of electrically charged filter media using electric force microscopy.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Investigation on charge deterioration of electrically charged filter media using electric force microscopy./
作者:	Kim, Jooyoun.
面頁冊數:	169 p.
附註:	Source: Dissertation Abstracts International, Volume: 66-10, Section: B, page: 5668.
Contained By:	Dissertation Abstracts International66-10B.
標題:	Textile Technology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3195146
ISBN:	9780542389023

Investigation on charge deterioration of electrically charged filter media using electric force microscopy.
Kim, Jooyoun.

Investigation on charge deterioration of electrically charged filter media using electric force microscopy. - 169 p.

Source: Dissertation Abstracts International, Volume: 66-10, Section: B, page: 5668.

Thesis (Ph.D.)--North Carolina State University, 2005.

Electret filter media is widely used in filtration application as the presence of embedded electrostatic charges allows for better particle capture efficiency with lower pressure drop.

ISBN: 9780542389023Subjects--Topical Terms:

1020710
Textile Technology.

Investigation on charge deterioration of electrically charged filter media using electric force microscopy.
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245 1 0 $a Investigation on charge deterioration of electrically charged filter media using electric force microscopy.
300 $a 169 p.
500 $a Source: Dissertation Abstracts International, Volume: 66-10, Section: B, page: 5668.
500 $a Directors: Roger L. Barker; Juan Hinestroza.
502 $a Thesis (Ph.D.)--North Carolina State University, 2005.
520 $a Electret filter media is widely used in filtration application as the presence of embedded electrostatic charges allows for better particle capture efficiency with lower pressure drop.
520 $a The effect of exposure to organic solvents on filtration performance of electret filter media was investigated using several different organic solvents and electret filter media. The exposure of electret filter media to liquid organic solvents caused a decrease in filtration performance without significant changes in resistance. It is hypothesized that the lowered performance of the electret filter media is due to the changes in electric field caused by the liquid organic solvents or to morphological changes.
520 $a Scanning Electron Microscopy (SEM) was used to examine any observable morphological changes in the fibers after exposure to liquid organic solvents. There were no observable changes in morphology of fibers, suggesting the performance deterioration by chemical exposure was not caused by morphological changes in fibers. Electric Force Microscopy (EFM) was used to analyze the electric field of electret filter media prior to and after exposure to organic liquid solvents. Changes in the electric field were detected and quantified. Electric field gradient imaging (EFGI) by phase and frequency detection was shown to be a feasible method for the analysis of charge deterioration in electret filtration media.
520 $a Two mathematical models based on electrostatics fundamentals were used to explain the behavior of EFM experimental data. Model I accounted for both a coulombic force and induced polarization phenomena. Model II incorporates a capacitance term. Both models exhibited good quantitative agreement with the experimental data hence the performance deterioration of the electret filter media after chemical immersion was proven to be directly related to changes in the electric field of the sample.
590 $a School code: 0155.
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650 4 $a Engineering, Materials Science. $3 1017759
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