Mechanical property enhancement of graphene liquid crystalline fibers via nanodiamond addition = 나노다이아몬드 도입을 통한 그래핀 액정 섬유의 물리적 성질 향상에 관한 연구

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Graphene oxide, which is 2-dimensional material, has lots of oxygen functional groups making the graphene oxide be dispersed in water and organic solvents. And the dispersed graphene oxide shows liquid crystallinity. The liquid crystalline graphene oxide is possible to be spun in fiber and because the fiber has excellent tensile strength and electrical conductivity, graphene fiber is considered as a candidate material for smart fabric which is next-generation application. To be applied on smart fabric, graphene fiber needs to show excellent elongation performance. Thus, many researches have been conducted to improve mechanical performance of graphene fiber. In this work, nanodiamond, which has a spherical structure in nanoscale, was introduced to fabricate graphene/nanodiamond composite fiber. The composite fiber showed improved elongational performance maintaining excellent tensile strength and electrical conductivity. By atomic force microscopy and rheology measurement, it is confirmed that nanodiamond worked as nano-bearing between graphene sheets resulting in reduced frictional force. Through this work, it is suggested that improved graphene/nanodiamond composite fiber is applicable to smart fabric.
Advisors
Kim, Sang Oukresearcher김상욱researcher
Description
한국과학기술원 :신소재공학과,
Publisher
한국과학기술원
Issue Date
2020
Identifier
325007
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 신소재공학과, 2020.2,[iv, 38 p. :]

Keywords

Graphene liquid crystalline fiber▼asmart fabric▼ananodiamond▼anano-bearing▼africtional force; 그래핀 액정섬유▼a스마트 패브릭▼a나노다이아몬드▼a나노베어링▼a마찰력

URI
http://hdl.handle.net/10203/283776
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=901478&flag=dissertation
Appears in Collection
MS-Theses_Master(석사논문)
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