Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 72, Issue -, Pages 32-39Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2015.01.009
Keywords
Layered structures; Chemical properties; Physical properties; Thermal analysis
Funding
- National Natural Science Foundation of China [21104050]
- China Postdoctoral Science Foundation [2013M541715, 2014T70541]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
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Pyrene-terminated liquid crystalline polymers (poly [8-(4-cyano-4'-biphenyl)-1-octanoylacrylate] and poly [6-(4-cyano-4'-biphenyl)-1-hexanoylacrylatel) were synthesized and used to functionalize graphene sheets via pi-pi interactions. The resulting liquid crystalline polymers functionalized graphene sheets were characterized by UV-vis spectroscopy, fluorescence spectroscopy, thermal gravimetric analysis, Fourier transform infrared spectroscopy, X-ray diffraction, atomic force microscopy and Raman spectroscopy. It was found that an intercalated layer structure was formed when polymer was grafted onto graphene sheets. The liquid crystalline polymers were able to effectively disperse graphene in N,N-dimethylformamide that were stable for months. Additionally, a remarkable smaller distance of adjacent mesogenic units was observed, which is attributed to the confinement of the polymer chains between 2D reduced graphene oxide sheets. (C) 2015 Elsevier Ltd. All rights reserved.
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