Application of reduced graphene oxide- molybdenum disulphide hybrid nano composites to magnetorheological fluid dampers and electromechanical actuators = 자기 유변 유체 댐퍼 및 전자기계 액츄에이터를 위한 환원된 그래핀 산화물-이황화 몰리브덴 복합 나노구조체

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The hybrid nano-composites offer a unique advantage of using the favorable properties of their constituent parts. Whereas, their properties can easily be tweaked by slightly changing the synthetic route. Reduced graphene-oxide (rGO) is a well-known two-dimensional material with supreme mechanical properties. On the other hand, Molybdenum Disulphide $(MoS_2)$ is a member of transition metal dichalcogenides (TMDCs) with semiconducting properties. In the present study, we utilized the supreme properties of $rGO/MoS_2$ hybrid nano composites in smart applications such as magnetorheological fluid (MRF) dampers and ionic polymer soft (IPS) actuators. The iron decorated $rGO/MoS_2$ (magnetic) out- performed (60% better yield stress than CIP) other additives in MRF applications. Moreover, the sedimentation rate was also improved. Similarly in IPS actuators, the $rGO/MoS_2$ composites, owing to the formation of nano-PN junctions (rapid charge transfer) and high charge storage (two Mo oxidation states), displayed exceptional performance (333% higher than rGO). Furthermore, a large bending displacement (4.69 mm) at high frequency (3 Hz) and low voltage (1.5 V) was obtained, which is desirable for future AI based robotic applications.
Advisors
Oh, Il Kwonresearcher오일권researcher
Description
한국과학기술원 :기계공학과,
Publisher
한국과학기술원
Issue Date
2018
Identifier
325007
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 기계공학과, 2018.8,[iv, 49 p. :]

Keywords

Magnetorheological fluids▼aIPS Actuators▼aMolybdenum Disulphide▼aReduced Graphene oxide▼aHybrid two dimensional materials.; 자기유변 유체▼aIPS 액추에이터▼a이황화 몰리브덴▼a환원된 그래핀 산화물▼a하이브리드 2차원 재료

URI
http://hdl.handle.net/10203/265895
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=828454&flag=dissertation
Appears in Collection
ME-Theses_Master(석사논문)
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