학회 | 한국고분자학회 |
학술대회 | 2005년 가을 (10/13 ~ 10/14, 제주 ICC) |
권호 | 30권 2호 |
발표분야 | 기능성 고분자 |
제목 | High Field Maxwell Stress Effect of Conductive Polymer Nanocomposite as Actuator Electrode |
초록 | Since many years, electroactive polymers (EAPs) are investigated as compliant, versatile, low density and low cost materials for the satisfaction of the growing need of new actuators for various small scale applications. Dielectric elastomers, one particular class of EAP, have been demonstrated to be able to generate strains greater than those obtainable with different types of EAP, as well as considerable stresses and rapid response times. A key feature of dielectric elastomer technology is the use of compliant electrodes. If the electrode cannot stretch in at least one planar direction of the film while its thickness contracts, actuation is dramatically reduced because the polymer is essentially incompressible. The selection of electrode material remains an ongoing area of research. In this study, three components such as carbon black(CB), vapor grown carbon fiber(VGCF), and silver powder(Ag) were added to the waterborne polyurethane (WPU) to obtain composites with the better conductivity and flexibility. We also studied a synergy effect between CB and VGCF. Electrical properties and mechanical properties of conductive filler/WPU nanocomposites were investigated. The filler distribution in the WPU matrix was measured by scanning electron microscopy (SEM). The displacement of actuator was measured with an OMRON Z4M-S40R laser displacement meter. CB/VGCF electrode had the largest displacement, and the displacement of CB/VGCF electrode was approximate to three times as large as Ag electrode. |
저자 | 김철호, 정해도, 이장우, 조남주 |
소속 | 부산대 |
키워드 | Actuator electrode; conductive nanocomposite; Maxwell stress effect |