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개질 Poly(ether ether ketone)을 이용한 이온성고분자-금속복합 구동체 제조
윤벼리(Bye-Ri Yoon),조재영(Jae Young Jho),양태욱(Tae Wook Yang) 한국고분자학회 2021 폴리머 Vol.45 No.3
이온성고분자-금속복합체는 낮은 전압에서도 큰 굽힘 변형을 가져올 수 있는 장점으로 인해 차세대 구동체의 소재로 주목을 받고 있으나, 이온 교환막의 낮은 기계적 물성으로 인해 구동 성능의 한계를 보인다. 본 연구에서는 우수한 기계적 물성을 가지는 엔지니어링 플라스틱인 poly(ether ether ketone)(PEEK)를 개질한 이온 교환막을 도입하여 이러한 한계를 극복하고자 하였다. 술폰화한 PEEK(SPEEK)를 개질시킨 막을 도입하여 구동 성능과 수명이 향상된 구동체를 제작하였다. Ionic polymer-metal composites are attracting attention as a material for next-generation actuators due to their advantages of large bending displacement at low voltages, but they show limitations in driving performance due to the low mechanical properties of ion exchange membranes. In order to overcome these limitations, modified poly(ether ether ketone) (PEEK), an engineering plastic with excellent mechanical properties, is introduced as an ion exchange membrane. The actuators with improved driving performance and lifetime were fabricated by introducing modified sulfonated-PEEK membrane.
송대석,조화연,Bye Ri Yoon,조재영,박종혁 한국고분자학회 2017 Macromolecular Research Vol.25 No.2
To develop air-operating conducting polymer (CP) actuators with enhanced performance, polymer electrolyte membranes with high ionic conductivity and mechanical endurance are necessary. Poly(ethylene oxide) oligomers penetrate into porous poly(vinylidene fluoride) membranes and sequentially undergo crosslinking to produce polymer electrolyte membranes. The properties of the electrolyte membranes are regulated by varying the degree of crosslinking. Polypyrrole layers are constructed on the surfaces of the membranes by chemical polymerization, creating CP actuators. CP actuators based on the resulting polymer electrolyte membranes operate properly in air and show highly enhanced performance such as a large displacement and long operation time. This approach, therefore, has great potential to extend the applications of CP actuators.
Jung, Seung Chai,Yoon, Bye-Ri,Oh, Jin Sun,Choi, Seung Hong,Han, Moon Hee,Lee, Jang Yeol,Cho, Hye Rim,Rhee, Kyehan,Jho, Jae Young Ovid Technologies (Wolters Kluwer) - Lippincott Wi 2012 ASAIO journal Vol.58 No.5
<P>In this study, we propose a new method for the enhancement of intraarterial thrombolysis by use of an endovascular vibrating polymer actuator probe (VPAP), which is fabricated from an ionic polymer metal composite (IPMC) actuator. The endovascular VPAP was fabricated by combining 0.8 0.8 10 mm3 IPMC samples, 0.22 mm 50 cm copper wires, and 40 cm of Teflon tube. The purpose of this study was to evaluate the thrombolysis efficiency of an endovascular VPAP in a dog model. Both renal arteries of the enrolled dogs (n = 5) were used in the current study. A distal portion of the renal artery in a mongrel dog was occluded by a blood clot from autologous venous whole blood. Intraarterial thrombolysis was performed by use of a VPAP without the actuation force (control group), by a VPAP-only (VPAP-only group), or with a combination of recombinant tissue plasminogen activator (rtPA) and a VPAP (VPAP + rtPA group). The thrombolysis efficiency was evaluated by the modified Thrombolysis in Myocardial Infarction (TIMI) grading system based on the consensus between two radiologists. The grading scales were compared according to each intraarterial thrombolysis method. The VPAP + rtPA and VPAP-only groups showed a significantly higher thrombolysis efficiency than did the control group (p < 0.05). The VPAP-only group also showed a significantly higher thrombolysis efficiency than did the control group (p < 0.05). The VPAP+ rtPA group showed a significantly higher thrombolysis efficiency than did the VPAP-only group (p < 0.05). The use of an endovascular VPAP was a feasible and useful method for intraarterial thrombolysis, and it enhanced the thrombolysis efficiency when combined with the thrombolytic agent rtPA.</P>
이정현,오진선,정광훈,이장열,Bye Ri Yoon,조재영,이계한 한국정밀공학회 2011 International Journal of Precision Engineering and Vol.12 No.4
Predicting of electro-mechanical behavior of ionic polymer metal composites (IPMCs) is important in many actuator design applications, but a general model for such predictions has not been successfully developed yet. A simple but versatile modeling method based on the concentrated ion boundary layer model was developed to advance the modeling of the bending behavior of IPMCs of different sizes. IPMC beams with different thicknesses and sizes were fabricated by stacking and hot-pressing method, and their mechanical bending characteristics were measured. Finite element analysis of the beams was performed using a concentrated ion boundary layer model that uses a thermal analogy. The calculated deformation and tip blocking force agreed well with the measured values for specimens of different sizes. This study shows that the proposed modeling method is simple but general enough to simulate the deformation characteristics of IPMC actuators of various sizes.