Bending of partially sulfonated ionic electroactive polymer gels in DC electric fields: hydrated cation effect and applications

Li Yao; Sonja Krause

doi:10.1117/12.475198

11 July 2002 Bending of partially sulfonated ionic electroactive polymer gels in DC electric fields: hydrated cation effect and applications

Li Yao, Sonja Krause

Author Affiliations +

Proceedings Volume 4695, Smart Structures and Materials 2002: Electroactive Polymer Actuators and Devices (EAPAD); (2002) https://doi.org/10.1117/12.475198
Event: SPIE's 9th Annual International Symposium on Smart Structures and Materials, 2002, San Diego, California, United States

Abstract

Two ionic electroactive polymer (EAP) gels, crosslinked partially sulfonated poly(styren-b-ethylene-co-butylene-b- styrene) (S-SEBS) and partially sulfonated crosslinked polystyrene (S-XL-PS), exhibit reversible bending in low DC electric fields when immersed in salt solutions. Both gels bent toward the cathode when pre-equilibrated in salt solutions. The steady-state bending angle increased as the size of the hydrated cation of the salt increased. The initial speed of bending increased as the mobility of the hydrated cation increased. Both the steady-state bending angle and initial speed of bending reached a maximum at an intermediate salt concentration, which varied little with the type of the salt. The time needed to reach the steady- state bending angle was associated with the time needed for the major hydrated cations to transport through the gel slabs. When the S-XL-PS gel ws pre-equilibrated in distilled water before the bending experiments, the gel first bent toward the anode before reversing toward the cathode in 0.065 - 0.08 M (C₄H₉)₄NHSO₄ (TBA) solutions. Such bending behavior did not occur in TBA at other concentrations (0.005 - 0.06 M), nor in other salt solutions Na₂SO₄, Cs₂SO₄, (CH₃)₄NHSO₄ (TMA) and the S-SEBS gel. Actuation performance of gels of the above polymers and their nanoparticle composites are compared and discussed.

Citation Download Citation

Li Yao and Sonja Krause "Bending of partially sulfonated ionic electroactive polymer gels in DC electric fields: hydrated cation effect and applications", Proc. SPIE 4695, Smart Structures and Materials 2002: Electroactive Polymer Actuators and Devices (EAPAD), (11 July 2002); https://doi.org/10.1117/12.475198

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