Enhancement of electrical and mechanical properties with polypropylene/graphene nanocomposite = 폴리프로필렌 그래핀 나노복합체의 전기적, 기계적 물성 향상에 관한 연구

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Graphene is a nanofiller with outstanding mechanical, electrical, and gas barrier properties because it is considered a carbon nanofiller which has a two dimensional structure with a one-atom-thick planar sheet of sp2 bonded carbon atoms that are densely packed in a honeycomb crystal lattice. Graphene-based polymer composites have attracted attention among the various applications of graphene because of their extraordinary electrical, mechanical, thermal, and gas barrier properties, which can be achieved using very low graphene loadings. However, the performance of graphene-based polymer composites is limited by the problem of graphene’s low dispersibility in polymer matrices, and particularly in non-polar polymers. This low dispersibility occurs, because graphene tends to aggregate due to its strong $\pi - \pi$ and van der Waals interactions. In this thesis we prepared and characterized poly(propylene)/graphene nanoplatelet (PP)/(GNP) nanocomposites, using PP-grafted thermally reduced graphene oxide (TRGO) as a compatibilizer to enhance mechanical , electrical, gas barrier and melt strength properties. In chapter 2, we optimized the synthesis of the compatibilizers by controlling the temperature of the reduction of graphene oxide. And chapter 3, we synthesized the PP-g-TRGO for compatibilizer of PP/GNP nanocomposites. In chapter 4, we fabricated the PP/PP-g-TRGO/GNP nanocomposites by and characterized the crystallinity and mechanical, electrical, gas barrier and melt strength properties by melt blending method. The crystallinity, mechanical, electrical, gas barrier and melt strength properties of PP/GNP nanocomposites were enhanced by the presence of only 0.1 wt.% PP-g-TRGO compatibilizer.
Advisors
Park, O Okresearcher박오옥researcher
Description
한국과학기술원 :생명화학공학과,
Publisher
한국과학기술원
Issue Date
2017
Identifier
325007
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 생명화학공학과, 2017.8,[vii, 75 p. :]

Keywords

polypropylene▼agraphene▼ananocomposite▼acompatibilizer▼athermal reduction▼amelt blending; 폴리프로필렌▼a그래핀▼a나노복합체▼a상용화제▼a열적 환원▼a용융 혼합

URI
http://hdl.handle.net/10203/241896
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=718952&flag=dissertation
Appears in Collection
CBE-Theses_Ph.D.(박사논문)
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