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나노물질 및 화학반응 연구단
나노물질 및 화학반응 연구단
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Liquid crystallinity driven highly aligned large graphene oxide composites

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Title
Liquid crystallinity driven highly aligned large graphene oxide composites
Author(s)
Kyung Eun Lee; Jung Jae Oh; Taeyeong Yun; Sang Ouk Kim
Publication Date
2015-04
Journal
JOURNAL OF SOLID STATE CHEMISTRY, v.224, no., pp.115 - 119
Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
Abstract
Graphene is an emerging graphitic carbon materials, consisting of sp2 hybridized two dimensinal honeycomb structure. It has been widely studied to incorporate graphene with polymer to utilize unique property of graphene and reinforce electrical, mechanical and thermal property of polymer. In composite materials, orientation control of graphene significantly influences the property of composite. Until now, a few method has been developed for orientation control of graphene within polymer matrix. Here, we demonstrate facile fabrication of high aligned large graphene oxide (LGO) composites in polydimethylsiloxane (PDMS) matrix exploiting liquid crystallinity. Liquid crystalline aqueous dispersion of LGO is parallel oriented within flat confinement geometry. Freeze-drying of the aligned LGO dispersion and subsequent infiltration with PDMS produce highly aligned LGO/PDMS composites. Owing to the large shape anisotropy of LGO, liquid crystalline alignment occurred at low concentration of 2 mg/ml in aqueous dispersion, which leads to the 0.2 wt% LGO loaded composites
URI
https://pr.ibs.re.kr/handle/8788114/2044
ISSN
0022-4596
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
Files in This Item:
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