부산대학교 도서관

Changes in Young's modulus, tensile strength, and tensile strain at break of polypyrrole (PPy) actuators after electrochemical actuations were investigated. The actuators made of 150 μm-thick PPy films with an area of 5 × 20 mm2 were fabricated using electropolymerization. The actuators were functioned in aqueous lithium bis(trifluoromethansulfonyl)imide (LiTFSI) electrolyte solutions containing 0% or 20% of 2-propanol or methanol. Actuating strains of the actuators functioned in the electrolyte solutions containing 2-propanol or methanol were larger than the electrochemical strain of the actuator functioned in the electrolyte solution without 2-propanol or methanol. However, notable increase in the Young's modulus and reduction in the tensile strength and the tensile strains at break were observed after actuations in the electrolyte solution containing 0% or 20% of 2-propanol or methanol. [ABSTRACT FROM PUBLISHER]