Charge Density Effects on Ionic Double Layer at Ionoealstomer Heterojunctions
발표자
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초록
내용
An ionoelastomer is a soft, liquid-free material that conducts ions. It is made by incorporating ionic[HJKim1] species of ionic liquids into elastomeric network. When voltage is applied across the surfaces of two oppositely charged ionoelastomers, an ‘ionic double layer’ (IDL) is formed by the depletion of free ions. This voltage also drives the electro-adhesion of the two ionoelastomers by electrostatic interactions. In this study, we measure the adhesion of ionoelastomer junctions under an external voltage to examine the effects of charge density on the thickness of the IDL. To reduce the charged density of ionoelastomers, we mixed non-charged butyl acrylate monomers with polyanion and polycation monomers. By analyzing the contact adhesion force and capacitance, we can obtain IDL thickness of the various charge density. This study will provide fundamental insight into the movement of free counter-ions at the junction surface of two oppositely charged ionoelastomers when charge density varies.