Study on mechanical properties of metal-polymer 3D composite structure fabricated by freeze-drying method = 동결건조법을 이용한 금속-폴리머 3D 복합 구조체의 기계적 특성 연구

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In this study, we suggest to fabricate high strength lightweight 3D porous structure based on polymer-metal composite using directional freeze-drying method. Ultralight cellulose nanofiber (CNF) reinforced with silver nanowire (AgNW) 3D porous structure was fabricated using one-step process of directional freeze-drying method. The strength of AgNW/CNF 3D porous structure increased by 14.3 times even when the relative density of the Ag nanowire increased by 0.29%. As the concentration of Ag nanowire increases, the stretch-dominant deformation property of AgNW/CNF 3D structure gradually increses. Metal coated polymer 3D porous structure was fabricated using copper electroless plating on the polyvinylalcohol (PVA) directional freeze-drying 3D structure. Sn-Ag activation condition for Cu electroless plating on non-conductive polymer was determined. Mechanical strength of Cu/PVA 3D structure was lower than expected because of tearing of copper coating layer. Further studies are needed to increase connectivity between metal and polymer to solve this problem.
Advisors
Han, Seung Minresearcher한승민researcher
Description
한국과학기술원 :신소재공학과,
Publisher
한국과학기술원
Issue Date
2019
Identifier
325007
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 신소재공학과, 2019.2,[v, 38 p. :]

Keywords

Freeze-drying▼acellulose nanofiber▼asilver nanowire▼apolyvinylalcohol▼aelectroless plating; 동결건조▼a셀룰로오스 나노섬유▼a은 나노선▼a폴리비닐알코올▼a무전해도금

URI
http://hdl.handle.net/10203/266526
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=843274&flag=dissertation
Appears in Collection
MS-Theses_Master(석사논문)
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