Searching for clues about Maxwell stress in the back-relaxation of ionic polymer-metal composites

Alain Boldini; Maxwell Rosen; Youngsu Cha; Maurizio Porfiri

doi:10.1117/12.2514274

Searching for clues about Maxwell stress in the back-relaxation of ionic polymer-metal composites

Alain Boldini, Maxwell Rosen, Youngsu Cha, Maurizio Porfiri

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

3 Citations (Scopus)

Abstract

The phenomenon of back-relaxation in ionic polymer-metal composites (IPMCs) has attracted the interest of the scientific community for two decades, yet a conclusive explanation of why and when it occurs is presently lacking. Recent studies have suggested that the interplay between osmotic pressure and Maxwell stress could be the key mechanism underlying back-relaxation, but experimental proof is missing to substantiate this hypothesis. Here, we seek to bring forward new evidence from the technical literature in favor of this explanation by analyzing existing experiments on contactless actuation of ionomer strips in an electrolyte solution. We demonstrate that Maxwell stress dominates osmotic pressure in the contactless actuation of ionomers, thereby supporting the claim that Maxwell stress could help understand back-relaxation in IPMCs.

Original language	English
Title of host publication	Electroactive Polymer Actuators and Devices (EAPAD) XXI
Editors	Yoseph Bar-Cohen, Iain A. Anderson, Nancy L. Johnson
Publisher	SPIE
ISBN (Electronic)	9781510625877
DOIs	https://doi.org/10.1117/12.2514274
Publication status	Published - 2019
Externally published	Yes
Event	Electroactive Polymer Actuators and Devices (EAPAD) XXI 2019 - Denver, United States Duration: 2019 Mar 4 → 2019 Mar 7

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	10966
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	Electroactive Polymer Actuators and Devices (EAPAD) XXI 2019
Country/Territory	United States
City	Denver
Period	19/3/4 → 19/3/7

Bibliographical note

Funding Information:
This research was supported by the National Science Foundation under Grant No. OISE-1545857 and by KIST flagship program under Project No. 2E29460.

Publisher Copyright:
© COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

Keywords

Contactless actuation
Electric double layers
Electrochemistry
Electrolyte solution
Ionomer

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

Access to Document

10.1117/12.2514274

Cite this

Boldini, A., Rosen, M., Cha, Y., & Porfiri, M. (2019). Searching for clues about Maxwell stress in the back-relaxation of ionic polymer-metal composites. In Y. Bar-Cohen, I. A. Anderson, & N. L. Johnson (Eds.), Electroactive Polymer Actuators and Devices (EAPAD) XXI Article 109661K (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10966). SPIE. https://doi.org/10.1117/12.2514274

Searching for clues about Maxwell stress in the back-relaxation of ionic polymer-metal composites. / Boldini, Alain; Rosen, Maxwell; Cha, Youngsu et al.
Electroactive Polymer Actuators and Devices (EAPAD) XXI. ed. / Yoseph Bar-Cohen; Iain A. Anderson; Nancy L. Johnson. SPIE, 2019. 109661K (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10966).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Boldini, A, Rosen, M, Cha, Y & Porfiri, M 2019, Searching for clues about Maxwell stress in the back-relaxation of ionic polymer-metal composites. in Y Bar-Cohen, IA Anderson & NL Johnson (eds), Electroactive Polymer Actuators and Devices (EAPAD) XXI., 109661K, Proceedings of SPIE - The International Society for Optical Engineering, vol. 10966, SPIE, Electroactive Polymer Actuators and Devices (EAPAD) XXI 2019, Denver, United States, 19/3/4. https://doi.org/10.1117/12.2514274

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abstract = "The phenomenon of back-relaxation in ionic polymer-metal composites (IPMCs) has attracted the interest of the scientific community for two decades, yet a conclusive explanation of why and when it occurs is presently lacking. Recent studies have suggested that the interplay between osmotic pressure and Maxwell stress could be the key mechanism underlying back-relaxation, but experimental proof is missing to substantiate this hypothesis. Here, we seek to bring forward new evidence from the technical literature in favor of this explanation by analyzing existing experiments on contactless actuation of ionomer strips in an electrolyte solution. We demonstrate that Maxwell stress dominates osmotic pressure in the contactless actuation of ionomers, thereby supporting the claim that Maxwell stress could help understand back-relaxation in IPMCs.",

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AU - Rosen, Maxwell

AU - Cha, Youngsu

AU - Porfiri, Maurizio

N1 - Funding Information: This research was supported by the National Science Foundation under Grant No. OISE-1545857 and by KIST flagship program under Project No. 2E29460. Publisher Copyright: © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

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N2 - The phenomenon of back-relaxation in ionic polymer-metal composites (IPMCs) has attracted the interest of the scientific community for two decades, yet a conclusive explanation of why and when it occurs is presently lacking. Recent studies have suggested that the interplay between osmotic pressure and Maxwell stress could be the key mechanism underlying back-relaxation, but experimental proof is missing to substantiate this hypothesis. Here, we seek to bring forward new evidence from the technical literature in favor of this explanation by analyzing existing experiments on contactless actuation of ionomer strips in an electrolyte solution. We demonstrate that Maxwell stress dominates osmotic pressure in the contactless actuation of ionomers, thereby supporting the claim that Maxwell stress could help understand back-relaxation in IPMCs.

AB - The phenomenon of back-relaxation in ionic polymer-metal composites (IPMCs) has attracted the interest of the scientific community for two decades, yet a conclusive explanation of why and when it occurs is presently lacking. Recent studies have suggested that the interplay between osmotic pressure and Maxwell stress could be the key mechanism underlying back-relaxation, but experimental proof is missing to substantiate this hypothesis. Here, we seek to bring forward new evidence from the technical literature in favor of this explanation by analyzing existing experiments on contactless actuation of ionomer strips in an electrolyte solution. We demonstrate that Maxwell stress dominates osmotic pressure in the contactless actuation of ionomers, thereby supporting the claim that Maxwell stress could help understand back-relaxation in IPMCs.

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KW - Electric double layers

KW - Electrochemistry

KW - Electrolyte solution

KW - Ionomer

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Searching for clues about Maxwell stress in the back-relaxation of ionic polymer-metal composites

Abstract

Publication series

Conference

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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