전기활성 고분자 전극 및 구동기에 관한 실험적 연구

이준만 ( Jun Man Lee ),류상렬 ( Sang Ryeoul Ryu ),이동주 ( Dong Joo Lee ),임정걸 ( Zheng Jie Lin ) 한국복합재료학회 2013 Composites research Vol.26 No.5

고분자 기지에 희석제의 첨가로 CNT 및 CB 입자의 분산성 향상 및 연질의 전극을 만들고자하였다. 희석제, CNT 및 CB 함유량에 따른 연질 전극재료의 전기적 및 기계적 특성을 평가하였다. 전극재료로서 최적의 혼합 조건은 기지 (KE-12)를 기본으로 희석제 80, CNT 3.5 그리고 CB 18 (phr)이었다. 이때의 비저항 값은 73 (Ω·cm)이었고, 인장강도와 인장탄성율 그리고 신장율은 각각 0.45 MPa, 0.21 MPa, 184%였다. 또한 최적화된 전극과 탄성체를 이용하여 간단한 구조의 구동기를 제작하여 그 특성을 평가하였다. 작동 전압 25 kV에서 탄성체 KE-12는 2.24 mm의 변위가 발생되었고, 희석제가 50 (phr) 혼합된 KE-12는 4.05mm의 변위가 발생되었다. 희석제 50 (phr) 혼합된 KE-12는 3M의 4910과 같은 탄성계수를 나타내지만, 더 높은 변위를 보였다. 동일한 재료 (KE-12)의 전극과 탄성체로 제작된 구동기는 피로수명 및 응용에 많은 장점이 있을 것으로 보인다. A thinner is used to improve the multi-walled carbon nano-tube (CNT) and carbon black (CB) dispersion in a polymer matrix and to make a soft electrode. The electrical and mechanical properties of the soft electrodes are investigated as functions of CNT, CB and thinner content. The optimal mixing condition for the electrode is thinner 80, CNT 3.5, CB 18 (phr) on the basis of matrix (KE-12). The specific resistance of that is 73 (Ω? cm), and tensile strength, tensile modulus, and elongation of that is 0.45 MPa, 0.21 MPa, and 184%, respectively. Also, a simple structure of the actuator with an optimized electrode and elastomer is fabricated and its characteristic is evaluated. At the operating voltage 25 kV, the displacement of an elastomer KE-12 is 2.24 mm, and that of an elastomer KE-12 with thinner 50 (phr) is 4.05 mm. It shows a higher displacement compared to that of 3M 4910 which has similar modulus. The actuator made with elastomer and electrode of the same material (KE-12) may have advantages for fatigue life and application.

자기력에 의한 보강재 배향효과가 고무복합재료의 기계적 및 전기적 특성에 미치는 영향

이준만(Jun Man Lee),류상렬(Sang Ryeoul Ryu),이동주(Dong Joo Lee) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11

The mechanical and electrical properties of RTV silicone rubber composite were investigated as functions of magnetic force and various reinforcing particles such as carbon nano-tube(CNT), carbon black(CB), and carbonyl iron particle(IP). To align the embedded fillers in the rubber, the cross-linking of composites took place in magnetic fields. The tensile strength and modulus of the CNT reinforced composites increase with the CNT content, and the orientation effects on tensile strength and modulus are up to 9% and 11.5%, respectively, at magnetic flux density(MFD) of 2Tesla. The tensile properties of composites with multiple particles(CNT, CB, IP) show the maximum value when the MFD is 1Tesla. The volume resistance of composites with CNT or CNT+IP is slightly decreased with the magnetic force, and that of composites with multiple particles(CNT, CB, IP) observes the minimum value when the MFD is 1Tesla. Also, the composite with oriented particles shows a low volume resistance when compared to that with randomly dispersed particles in all conditions.

전기활성 고분자 전극용 탄소입자 강화고무의 전기적 및 기계적 특성

이준만(Jun Man Lee),류상렬(Sang Ryeoul Ryu),이동주(Dong Joo Lee) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11

The electrical and mechanical properties of RTV silicone rubber composites are investigated as functions of multi-walled carbon nano-tube (CNT), carbon black (CB) and thinner content. The thinner is used to improve the CNT and CB dispersion in the matrix. The electrical and mechanical properties of the rubber composite with CNT are improved when compared to this composite with CB at the same content. When the thinner content is 80phr, the electric resistance of the composite decreases significantly with increasing the CNT content and show the saturation on the contact point after CNT 2.5phr. As the thinner content increases, the dispersion of conductive particles improves, however, the critical CB content increases because of the reduced CB weigh ratio. It is believed that the manufacturing of the electrode which has a good flexibility and excellent electrical properties is possible because lots of CNT and CB can be mixed with a lot of thinner.

화염 플라즈마 및 실란 표면처리가 실리카 강화 고무복합재료의 기계적 특성에 미치는 영향

이준만 ( Jun Man Lee ),류상렬 ( Sang Ryeoul Ryu ),이동주 ( Dong Joo Lee ) 한국복합재료학회 2011 Composites research Vol.24 No.6

대기압 화염 플라즈마(APFP) 및 에폭시 실란(ES) 표면처리 한 실리카(Vf = 40%)강화 고무복합재료의 기계적 특성에 대한 실험적 연구를 수행하였다. 고무복합재료의 인장강도는 평균 입자경이 감소할수록 크게 증가하였고, 평균 입자경 2.2㎛일 때, 기지(2.52㎫)에 비해 1.4배 증가하였다. 또한 APFP 및 EP의 처리로 인장강도가 각각 8.8∼13.3%, 9.9∼12.5% 향상되었다. 평균 입자경이 26.6㎛일 때, 고무복합재료의 인장탄성율은 기지(0.88㎫)에 비해 2배 증가하였고, APFP 및 EP의 처리로 인장 탄성율이 각각 15.6∼22.8%, 21.1∼25.8% 증가되었다. 기존의 실란 커플링제 처리방법은 유기용제의 사용 등의 몇 가지 단점을 가지고 있지만, APFP 처리법은 기계적 특성을 향상시키는데 빠르고, 경제적이며 친환경적인 방법이라 판단된다. The effect of surface treatments with the atmospheric pressure flame plasma (APFP) and epoxy silane (ES) is experimentally investigated to yield the best mechanical properties of silica (Vf = 40%) reinforced elastomeric composites. The tensile strength of the composites is increased significantly with decrease the mean diameter. When the diameter is 2.2㎛, that of the composite is increased about 1.4 times compared to the matrix (2.52 ㎫). Also, the tensile strength of silica reinforced composites with APFP and ES treated is increased 8.8∼13.3%, 9.9~12.5%, respectively. When the diameter is 26.6㎛, the tensile modulus of the composite is increased about 2 times compared to the matrix (0.88㎫), and the tensile modulus of silica reinforced composites with APFP and ES treated is increased 15.6∼22.8%, 21.1~25.8%, respectively. Conventional silane coupling agent treatment have a few disadvantages because of using organic solvents. However APFP treatment is a fast,economic and eco-friendly method to improve the mechanical properties.

전기활성 고분자 전극용 탄소입자 강화고무의 전기적 및 기계적 특성

이준만(Jun Man Lee),류상렬(Sang Ryeoul Ryu),이동주(Dong Joo Lee) 대한기계학회 2013 大韓機械學會論文集A Vol.37 No.12

다중벽 탄소나노튜브 (CNT), 카본블랙 (CB) 그리고 희석제의 함유량에 따른 상온경화형 실리콘 고무복합재료의 전기적 및 기계적 특성에 대해 연구하였다. 기지 내에 CNT 및 CB의 분산을 향상시키기 위해서 희석제를 사용하였다. CNT 강화 복합재료의 전기적 및 기계적 특성은 같은 함유량의 CB이 강화된 복합재료에 비해 향상되었다. 희석제의 함유량이 80phr일 때, 복합재료의 전기저항은 CNT 함유량 증가에 따라 크게 감소하였고, CNT 2.5phr에서 접촉점 포화현상을 보였다. 희석제 함유량 증가에 따라 전도성 입자들의 분산은 향상되었지만, CB의 무게비 감소로 임계 CB 함유량은 증가하였다. 희석제의 함유량 증가로 많은 CNT와 CB의 혼합이 가능하므로 유연하면서 전기적 특성이 우수한 전극의 제작이 가능하다고 판단된다. The electrical and mechanical properties of room temperature vulcanized (RTV) silicone rubber composites are investigated as functions of multi-walled carbon nanotube (CNT), carbon black (CB), and thinner content. The thinner is used to improve the CNT and CB dispersion in the matrix. The electrical and mechanical properties of the composite with CNT are improved when compared to the composite with CB at the same content. As the thinner content is 80 phr, the electric resistance of the composite decreases significantly with the CNT content and shows contact point saturation of CNT at 2.5 phr. As the thinner content increases, the dispersion of conductive particles improves; however, the critical CB content increases because of the reduction in the CB weight ratio. It is believed that an electrode that needs good flexibility and excellent electrical properties can be manufactured when the amount of CNT and CB are increased with the thinner content.

운동참여 수준과 직무만족도의 관계

정경회,이준만 한국스포츠산업경영학회 1997 한국스포츠산업경영학회지 Vol.2 No.1

스포츠활동은 건강유지 및 체력단련의 차원을 넘어서 정신적·사회적으로 매우 의의있는 활동으로 한 영역을 점유하고 있으며 노동현장에서는 생산성을 향상시키는 종업원간의 인간관계 조성에 이바지하며 소속 기업체의 발전을 위하여 서로 협력하는데 중요한 역할을 담당하고 있다. 본 연구는 스포츠활동에 참여하고 있는 직장인을 대상으로 성인남자들의 운동참여 수준과 직무만족도의 관계를 질문지법을 이용하여 자료를 수집·분석한 결과 다음과 같은 결론을 얻었다. 첫째, 운동참여 빈도별 직무만도 에서는 운동참여 빈도가 많을수록 보다 높은 직무만족도를 나타냈다. 둘째, 운동참여 경력별 직무만족도에서는 운동참여 경력이 많을수록 보다 높은 직무만족도를 나타냈다. This paper investigates the correlation between the participation of physical activity and the degree of job satisfaction. The sample comprised 422 maleadults who regularly participate in physical activities in various sports clubs at Chonju city. A MS & Job satisfaction questionnare was utilized to compare and analyze the correlation between the participation of physical activity and the degree of job satisfaction. On the basis of the results collected from this investigation, the following conclusions were made: 1. After it was the correlations of exercise frequency and differentiation groups, it was concluded that monthly incomes and health degrees marked p〈0.0001, job p〈0.01. age and personal school resume p〈0.05. 2. After it was analyzed the correlations of exercise duration and differentiation group, it was concluded that health degrees marked p〈0.0001. monthly incomes and personal school resume p〈0.01. age p〈0.05. 3. After it was analyzed the correlation between exercise frequency and exercise duration and differentiation group, it was concluded that only health degrees marked low correlations. 4. After it was analyzed the correlation between exercise frequency and job satisfaction, it was concluded that male-adults considerable satisfaction together with drives for activeness. achievements. progressiveness. devotions. human relations. responsibilities. 5. After it was analyzed the correlation between exercise duration and job satisfaction, it was concluded that the longer exercise duration is, the more job satisfaction male adults have together with activeness. achievements. progressiveness. devotions. human relations. responsibilities.