TY - JOUR
T1 - Actuation of a novel Pluronic-based hydrogel
T2 - Electromechanical response and the role of applied current
AU - Engel, Leeya
AU - Berkh, Olga
AU - Adesanya, Kehinde
AU - Shklovsky, Jenny
AU - Vanderleyden, Els
AU - Dubruel, Peter
AU - Shacham-Diamand, Yosi
AU - Krylov, Slava
N1 - Funding Information:
The research leading to these results took place as part of the Heart-e-Gel consortium and has received funding from the European Union Seventh Framework Programme FP7/2007–2013 under grant agreement no. 258909 .
PY - 2014
Y1 - 2014
N2 - A novel Pluronic-based hydrogel copolymer was synthesized and actuated. The combined properties of improved biocompatability and response to electrical excitation of this cross-linked gel make it a potential candidate for actuators such as electrically controllable occlusion devices and non-surgical implants. The electrical response of the copolymer was verified using bending tests performed in potassium chloride (KCl) solutions of different concentrations and the novel material was characterized using equilibrium swelling experiments, environmental scanning microscopy (ESEM) imaging, and a potentiometric method for estimating the fixed charge. We considered the influence of current, pH and concentration on the hydrogel actuator behavior, which was manifested in the degree of bending and in direction of bending. A reversal of the bending direction was observed twice in a single system under DC bias (without reversal of electric field polarity). We described this phenomenon as representing several different types of electric-responsive behavior that become dominant at different actuation stages of the polymer system. The distinction between the different actuation effects is important for the development of hydrogel actuators.
AB - A novel Pluronic-based hydrogel copolymer was synthesized and actuated. The combined properties of improved biocompatability and response to electrical excitation of this cross-linked gel make it a potential candidate for actuators such as electrically controllable occlusion devices and non-surgical implants. The electrical response of the copolymer was verified using bending tests performed in potassium chloride (KCl) solutions of different concentrations and the novel material was characterized using equilibrium swelling experiments, environmental scanning microscopy (ESEM) imaging, and a potentiometric method for estimating the fixed charge. We considered the influence of current, pH and concentration on the hydrogel actuator behavior, which was manifested in the degree of bending and in direction of bending. A reversal of the bending direction was observed twice in a single system under DC bias (without reversal of electric field polarity). We described this phenomenon as representing several different types of electric-responsive behavior that become dominant at different actuation stages of the polymer system. The distinction between the different actuation effects is important for the development of hydrogel actuators.
KW - Biomaterials
KW - Electrically stimulated hydrogel
KW - Electroactive polymers
KW - Fixed charge
KW - Hydrogel actuator
KW - PF127
UR - http://www.scopus.com/inward/record.url?scp=84887416754&partnerID=8YFLogxK
U2 - 10.1016/j.snb.2013.10.031
DO - 10.1016/j.snb.2013.10.031
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AN - SCOPUS:84887416754
SN - 0925-4005
VL - 191
SP - 650
EP - 658
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
ER -