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Performance Characterization of Polyaniline Coated Electro-Active Paper Actuator
Hyun-U Ko(고현우),Seong Cheol Mun(문성철),Lindong Zhai(적림동),Ki-Baek Kim(김기백),Jaehwan Kim(김재환) Korean Society for Precision Engineering 2013 한국정밀공학회지 Vol.30 No.6
Bending actuators composed of cellulose with an electrically conducting polymer (CP) are fabricated and their performance is characterized in the air. Two different counter ions, perchlorate and tetrafluoroborate are used as dopant ions in the polyaniline CP processing. CPcellulose- CP trilayer and CP-cellulose bilayer samples are fabricated with different dopant ions, and their actuation performance is evaluated in terms of tip displacement, blocked force and electrical power consumption along with the humidity level and actuation frequency. The trilayer samples substantially enhanced the tip displacement compared to the bilayer ones. The actuation performance of the trilayer actuator is three times better than that of original cellulose electroactive paper (EAPap) actuator. The displacement and blocked force of CP-EAPap actuators are dependent on the humidity and frequency.
Fabrication and Characterization of Array Tactile Actuator Based on Cellulose Acetate
Hyun-Chan Kim(김현찬),Sungryl Yun(윤성률),Hyun-U Ko(고현우),Jaehwan Kim(김재환) Korean Society for Precision Engineering 2015 한국정밀공학회지 Vol.32 No.8
This paper reports the enhanced fabrication and characterization of a 3 × 3 array tactile actuator composed of cellulose acetate. The array tactile actuator, with dimensions of 15 × 15 × 1 ㎣, consists of 9 pillar-supported cells made from a cellulose-acetate molding. The fabrication process and performance test along with the results for the suggested actuator are explained. To improve the cell-array fabrication, a laser cut was adopted after the molding process. The displacement of the unit cell increased the input voltage and frequency. Various top masses are added onto the actuator to mimic the touch force, and the acceleration of the actuator is measured under actuation. When 2 kV is applied to the actuator, the maximum acceleration is 0.64 g, which is above the vibrotactile threshold. The actuation mechanism is associated with the electrostatic force between the top and bottom electrodes.
김재환 ( Jae Hwan Kim ),고현우 ( Hyun U Ko ),문성철 ( Seong Cheol Mun ),김주형 ( Joo Hyung Kim ),김흥수 ( Heung Soo Kim ) 한국공업화학회 2013 공업화학전망 Vol.16 No.4
최근 진동과 같은 주위 환경의 기계적인 에너지로부터 전기에너지를 얻는 압전 에너지 하베스팅 기술은 무선센서, 모바일 기기 등에 무선으로 전력을 공급하는 기술의 필요가 대두됨에 따라 많은 관심을 받고 있다. 모바일 기기나 무선센서 네트워크는 지금까지 배터리를 전원으로 사용하여 왔으나 배터리 수명이 짧아 배터리 교체가 불편하 며 어떤 경우에는 불가능하다. 따라서 모바일 기기나 무선센서의 자가전원으로 에너지 하베스팅이 필요하다. 본 글은 진동 에너지로부터 전기 에너지를 획득하는 압전 에너지 하베스팅 기술에 대한 개요, 기술개발 현황, 당면한 기술적 과제, 시장동향, 그리고 향후 전망에 대해 소개한다.