• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2008년도 추계학술대회논문집
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• pp.374-375
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• 2008

In this study, the nano-composite actuator based on Fullerene and Nafion was newly developed to improve the electro active polymer actuators. The tensile test was employed to define the mechanical stiffness and strength of the nano-composite membrane. Also, the bending displacement of the Fullerene-Nafion based nano-composite actuator was investigated under DC and AC excitations with various magnitudes and frequencies. As a result, the new nano-composite actuator based on Fullerene-Nafion shows much larger deformation than the pure Nafion based actuator and solves the straightening back Problem of the previous electro active polymer actuators.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2011년도 춘계학술대회 논문집
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• pp.287-288
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• 2011

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2001년도 ICCAS
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• pp.103.3-103
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• 2001

Recently Electro active polymer has been discussed in various researches as new actuators replacing the human muscles. Since they have confronted a limitation of more advanced application with traditional actuator. IPMC (Ion exchange Polymer Metal Composite) is one of candidate materials for new actuators. In this paper, we propose a new approach and design principle for the IPMC polymer actuator to conquer the weaknesses of IPMC that is intrinsic weak structural stiffness and low trust forces. In the first we performs some experimental works about how the basic specific characteristics of IPMC vary and what the optimal operating conditions are. And we have applied IPMC as active cilium for realization of annelida motion like ...

• Composites Research
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• 제20권3호
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• pp.50-54
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• 2007

본 연구에서는 IPMC의 기본적인 기계적 특성을 알아보았다. 기전폴리머의 한 종류인 IPMC는 굽힘형 작동, 가벼움, 저전력 소모, 유연성 등의 많은 장점을 가진 재료이다. 따라서 IPMC는 생체모방형 작동기와 센서로서 많은 가능성을 가지고 있다. 이런 가능성을 바탕으로 IPMC를 실제로 응용하기 위하여 IPMC의 변형, 구동력, 주파수 응답 등 기본적인 기계적 특성을 연구하였다. 우선 이온교환폴리머의 한 종류인 네피온 용액을 사용하여 여러 가지 두께의 네피온 막을 만들고, 무전해 도금을 통해 IPMC를 제작하였다. 이렇게 제작된 IPMC의 규격, 인가 전압에 따른 변형, 구동력, 주파수 응답 특성에 관한 실험을 수행하고, 실험 결과를 통해 IPMC 성능의 실험식과 등가 강성 모델을 수립하였다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2012년도 추계학술대회 논문집
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• pp.219-220
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• 2012

• Composites Research
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• 제32권5호
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• pp.211-215
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• 2019

정적인 상태인 체외 환경(in vitro)에서의 세포배양 과정은 실제 생체 내 환경에서의 세포발달과정과는 많은 차이가 존재한다. 따라서, 체내 환경의 정밀한 모사를 위해서는, 기계적인 자극을 세포에 전달하여 줄 수 있는 동적 세포배양장치가 필수적이다. 하지만 기존의 동적 세포배양장치에는 튜브, 펌프, 모터 등의 비교적 복잡한 장치들을 필요로 하였으며, 전달되는 기계적 자극도 단순한 형태였다. 본 연구에서는 단순한 장치로 구동되는 동적 세포배양장치를 위하여 전기활성고분자(EAP) 구동기를 동력원으로 하는 소형 동적 세포배양장치를 설계하였다. 이 장치는 다양한 기계적 자극을 세포에 전달하는 것이 가능하다.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2006년도 6th International Meeting on Information Display
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• pp.1473-1475
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• 2006

The electro-optic properties of an active-matrix polymer network liquid crystal display (AM-PNLCD) with crossed polarizer films to improve its contrast ratio were evaluated. By using crossed polarizer films, it shows good contrast ratio as well as wide viewing angle and adequate response time at normal TFT-twisted nematic (TN) LCD driving voltage (2.8V).

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2009년도 추계학술대회 논문집
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• pp.198-201
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• 2009

Due to piezoelectric property of regenerated cellulose paper, a green energy harvester using an electro-active paper (EAPap) was studied. In order to design the green energy harvester, we simulated cymbal type energy harvesting structures for single and multi-stacked layers of EAPap films. From the simulation, the optimized material orientation, thickness of harvesting structure was selected. By measuring of the induced output voltage by applying stress on energy harvester will be explained in detail. Therefore we propose the feasibility of the nature-friendly piezoelectric EAPap as a new green energy harvesting material.

• Macromolecular Research
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• 제17권2호
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• pp.116-120
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• 2009

The cellulose smart material called electro-active paper (EAPap) is made by regenerating cellulose. However, the actuator performance is degraded at low humidity levels. To solve this drawback, EAPap bending actuators were made by activating wet cellulose films in three different room-temperature ionic liquids: l-butyl-3-methylimidazolium hexaflurophosphate ($BMIPF_6$), 1-butyl-3-methylimidazolium chloride (BMICL) and 1-butyl-3-methylimidazolium tetrafluroborate ($BMIBF_4$). In the results, the actuator performance was dependent on the type of anions in the ionic liquids, in the order of $BF_4$>Cl>$PF_6$. The BMIBF 4-activated actuator showed the maximum displacement of 3.8 mm with low electrical power consumption at relatively low humidity. However, the BMICL-activated actuator showed a slight degradation of actuator performance. Further performance and durability improvement will be possible once various ionic liquids are blended with cellulose.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2005년도 추계학술대회 논문집
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• pp.310-313
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• 2005

In recent years, as the robot technology is developed, the researches on the artificial muscle actuator that enable robot to move dexterously like biological organ become active. The widely used materials for artificial muscle are the shape memory alloy and the electro-active polymer. These actuators have the higher energy density than the electro-mechanical actuator such as motor. However, there are some drawbacks for actuator. SMA has the hysterical dynamic characteristics. In this paper, the simulation of anthropomophic robotic hand is performed using ADAMS and the segmented binary control for reducing the hysteresis of SMA is proposed. SMA is controlled by thermo-electric module. The relations between the force and the hysteresis are developed to verify the validity of the suggested method.