Gas diffusion expansion-increased thickness and enhanced electromechanical response of cellular polymer electret films

Mika Paajanen; Hannu Minkkinen; Jaakko Raukola

doi:10.1109/ISE.2002.1042976

Gas diffusion expansion-increased thickness and enhanced electromechanical response of cellular polymer electret films

Mika Paajanen, Hannu Minkkinen, Jaakko Raukola

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

61 Citations (Scopus)

Abstract

With a high-pressure gas treatment it is possible to force extra gas inside a cellular polymer film structure, expand the film and thus reduce the film stiffness. A permanent increase in the film thickness can be in the range of 100% when using ambient temperature of about 90°C and gas pressure of about 20 bar during an 8-min long gas expansion process. High-pressure treatment at lower temperatures will increase the elastic nature of the film expansion and thus decrease the permanent increase in the film thickness. The results show that a clear increase in the electromechanical response up to 480 or 330 pCN^-1 was achieved with 45 or 60 µm thick polypropylene sample films, respectively. The corresponding gas contents were 48 and 39%, respectively.

Original language	English
Title of host publication	Proceedings, 11th International Symposium on Electrets
Publisher	IEEE Institute of Electrical and Electronic Engineers
Pages	191-194
ISBN (Print)	978-0-7803-7560-4
DOIs	https://doi.org/10.1109/ISE.2002.1042976
Publication status	Published - 2002
MoE publication type	A4 Article in a conference publication
Event	11th International Symposium on Electrets, ISE11 - Melbourne, Australia Duration: 1 Oct 2002 → 3 Oct 2002

Conference

Conference	11th International Symposium on Electrets, ISE11
Country/Territory	Australia
City	Melbourne
Period	1/10/02 → 3/10/02

Keywords

cellular film
gas content
electret
piezoelectricity
gas diffusion expansion

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10.1109/ISE.2002.1042976

Cite this

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title = "Gas diffusion expansion-increased thickness and enhanced electromechanical response of cellular polymer electret films",

abstract = "With a high-pressure gas treatment it is possible to force extra gas inside a cellular polymer film structure, expand the film and thus reduce the film stiffness. A permanent increase in the film thickness can be in the range of 100% when using ambient temperature of about 90°C and gas pressure of about 20 bar during an 8-min long gas expansion process. High-pressure treatment at lower temperatures will increase the elastic nature of the film expansion and thus decrease the permanent increase in the film thickness. The results show that a clear increase in the electromechanical response up to 480 or 330 pCN-1 was achieved with 45 or 60 µm thick polypropylene sample films, respectively. The corresponding gas contents were 48 and 39%, respectively.",

keywords = "cellular film, gas content, electret, piezoelectricity, gas diffusion expansion",

author = "Mika Paajanen and Hannu Minkkinen and Jaakko Raukola",

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doi = "10.1109/ISE.2002.1042976",

language = "English",

isbn = "978-0-7803-7560-4",

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Paajanen, M , Minkkinen, H & Raukola, J 2002, Gas diffusion expansion-increased thickness and enhanced electromechanical response of cellular polymer electret films. in Proceedings, 11th International Symposium on Electrets. IEEE Institute of Electrical and Electronic Engineers, pp. 191-194, 11th International Symposium on Electrets, ISE11, Melbourne, Australia, 1/10/02. https://doi.org/10.1109/ISE.2002.1042976

Gas diffusion expansion-increased thickness and enhanced electromechanical response of cellular polymer electret films. / Paajanen, Mika ; Minkkinen, Hannu; Raukola, Jaakko.
Proceedings, 11th International Symposium on Electrets. IEEE Institute of Electrical and Electronic Engineers, 2002. p. 191-194.

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

TY - GEN

T1 - Gas diffusion expansion-increased thickness and enhanced electromechanical response of cellular polymer electret films

AU - Paajanen, Mika

AU - Minkkinen, Hannu

AU - Raukola, Jaakko

N1 - Alt title spelling Gas diffusion expansion -increased thickness and enhanced electromechanical response of cellular polymer electret films

PY - 2002

Y1 - 2002

N2 - With a high-pressure gas treatment it is possible to force extra gas inside a cellular polymer film structure, expand the film and thus reduce the film stiffness. A permanent increase in the film thickness can be in the range of 100% when using ambient temperature of about 90°C and gas pressure of about 20 bar during an 8-min long gas expansion process. High-pressure treatment at lower temperatures will increase the elastic nature of the film expansion and thus decrease the permanent increase in the film thickness. The results show that a clear increase in the electromechanical response up to 480 or 330 pCN-1 was achieved with 45 or 60 µm thick polypropylene sample films, respectively. The corresponding gas contents were 48 and 39%, respectively.

AB - With a high-pressure gas treatment it is possible to force extra gas inside a cellular polymer film structure, expand the film and thus reduce the film stiffness. A permanent increase in the film thickness can be in the range of 100% when using ambient temperature of about 90°C and gas pressure of about 20 bar during an 8-min long gas expansion process. High-pressure treatment at lower temperatures will increase the elastic nature of the film expansion and thus decrease the permanent increase in the film thickness. The results show that a clear increase in the electromechanical response up to 480 or 330 pCN-1 was achieved with 45 or 60 µm thick polypropylene sample films, respectively. The corresponding gas contents were 48 and 39%, respectively.

KW - cellular film

KW - gas content

KW - electret

KW - piezoelectricity

KW - gas diffusion expansion

U2 - 10.1109/ISE.2002.1042976

DO - 10.1109/ISE.2002.1042976

M3 - Conference article in proceedings

SN - 978-0-7803-7560-4

SP - 191

EP - 194

BT - Proceedings, 11th International Symposium on Electrets

PB - IEEE Institute of Electrical and Electronic Engineers

T2 - 11th International Symposium on Electrets, ISE11

Y2 - 1 October 2002 through 3 October 2002

ER -

Gas diffusion expansion-increased thickness and enhanced electromechanical response of cellular polymer electret films

Abstract

Conference

Keywords

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