Ionic flexogelectric effect in polymeric gels

Mohsen Shahinpoor

doi:10.1117/12.237093

26 April 1996 Ionic flexogelectric effect in polymeric gels

Mohsen Shahinpoor

Proceedings Volume 2779, 3rd International Conference on Intelligent Materials and 3rd European Conference on Smart Structures and Materials; (1996) https://doi.org/10.1117/12.237093
Event: 3rd International Conference on Intelligent Materials, 1996, Lyon, France

Abstract

Reported are a number of quantitative observations and analytical modeling of a new effect in ionic polymeric gels such as poly(2-acrylamido-2-methylpropanesulfonic acid) or PAMPS, polyacrylic acid plus sodium acrylate cross-linked with bisacrylamide (PAAM) or various chemically-doped combinations of polyacrylic acid plus polyvinylalcohol(PAA-PVA). This new effect, hereafter, referred to as "Flexogelectric Effect" is basically the inverse of the effect originally reported in 1965 by three GE researchers, namely, Hamlen, Kent and Shafer in which the imposition of an electric field on an ionic polymeric gel fiber produced extension or contraction. Here, it is shown , both theoretically and experimentally, that mechanically induced nonhomogeneous deformations, and in particular bending of strips of such ionic gels can produce an electric field and the associated voltage. For typical samples of such gels (4x4x4Omm) with copper or platinum foil electrodes snugly contacting a pair of opposite sides (4x4Omm) of the strip, the difference in voltage measured between the electrodes for extreme bending configurations of the gel is typically in the 10's of milivolts range. This voltage difference which is quite significant for many engineering applications, such as large strain and deformation sensing, is still an order of magnitude smaller than the voltage necessary to induce similar deformations in the gel itself. A plausible explanation is also presented for such discrepancies.

Citation Download Citation

Mohsen Shahinpoor "Ionic flexogelectric effect in polymeric gels", Proc. SPIE 2779, 3rd International Conference on Intelligent Materials and 3rd European Conference on Smart Structures and Materials, (26 April 1996); https://doi.org/10.1117/12.237093

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available