• 文献标题:   Liquid crystallinity driven highly aligned large graphene oxide composites
  • 文献类型:   Article
  • 作  者:   LEE KE, OH JJ, YUN T, KIM SO
  • 作者关键词:   graphene, graphene oxide, composite, liquid crystal
  • 出版物名称:   JOURNAL OF SOLID STATE CHEMISTRY
  • ISSN:   0022-4596 EI 1095-726X
  • 通讯作者地址:   Inst for Basic Sci Korea
  • 被引频次:   10
  • DOI:   10.1016/j.jssc.2014.09.027
  • 出版年:   2015

▎ 摘  要

Graphene is an emerging graphitic carbon materials, consisting of sp(2) 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. Crown Copyright (C) 2014 Published by Elsevier Inc. All rights reserved.