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    Characterization and analysis of motion mechanism of electroactive chitosan-based actuator
    (Elsevier Sci Ltd, 2018) Altinkaya, Emine; Seki, Yoldas; Cetin, Levent; Gurses, Baris Oguz; Ozdemir, Okan; Sever, Kutlay; Sarikanat, Mehmet
    In order to analyze the bending mechanism of the electroactive chitosan- based actuator, different amounts of poly(diallyldimethylammonium chloride) (PDAD) were incorporated in chitosan solution. The effects of PDAD concentration on electromechanical performance of chitosan actuator were investigated under various excitation voltages. With the incorporation of PDAD into chitosan solution, crosslinked chitosan film acts as an actuator showing a considerable displacement behavior. However it can be noted that higher incorporation of PDAD into chitosan solution decreased the performance of the actuators. Thermal, viscoelastic, and crystallographic properties of the chitosan films were examined by thermogravimetric analysis, dynamic mechanical analysis, and X- ray diffraction analysis, respectively. The effect of incorporation of PDAD in chitosan- based film on morphological properties of chitosan film was determined by scanning electron microscopy. It was observed that the films involving PDAD have larger pore size than the PDAD free film.
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    Electromechanical performance of chitosan-based composite electroactive actuators
    (Elsevier Sci Ltd, 2016) Altinkaya, Emine; Seki, Yoldas; Yilmaz, Ozgun Cem; Cetin, Levent; Ozdemir, Okan; Sen, Ibrahim; Sever, Kutlay
    A novel chitosan-based electroactive actuator was fabricated by using chitosan, N, N'-methylenebisacrylamide (MBA), poly (diallyldimethylammonium chloride), and gold metal. The constructive effect of crosslinker to the actuator performance was investigated by using various amounts of MBA. The chitosan-based film samples were characterized using Fourier transform infrared analyses, X-ray diffraction analysis, thermogravimetric analysis, scanning electron microscopy analysis, and tensile test. The viscoelastic properties of films were determined by dynamic mechanical analysis. The motion and force generation capabilities and the repeatability of the actuators were also investigated under electrical stimuli up to 21 V. The suitability of the prepared chitosan-based films to be used as actuator for soft robotic applications is verified experimentally. (C) 2016 Elsevier Ltd. All rights reserved.