NDLI: Reinforcement and interphase of polymer/graphene oxide nanocomposites

Content Provider	Royal Society of Chemistry (RSC)
Author	Wan, Chaoying Chen, Biqiong
Copyright Year	2012
Abstract	Polymer/graphene (oxide) nanocomposites exhibit enhanced mechanical properties at low volume fractions of graphene-based nanofillers. An understanding of the reinforcement behaviour was developed through the investigation of interfacial interactions between graphene oxide (GO) nanoplatelets and polymer matrix (PLLA, PCL, PS or HDPE) by combination of microstructure characterization and micromechanical modeling methods. The interfacial interaction determines the degree of dispersion of GO in polymers, interfacial adhesion strength as well as reinforcement efficiency, which can be tailored by the surface chemistry of GO and functionality of polymers. Homogeneous dispersion of GO nanoplatelets with high aspect ratios was found in PLLA and PCL matrices, as well as in lower polar polymer PS due to the preferable interactions between the aromatic rings and the graphene layers, while stacked GO layers with a lower aspect ratio were observed in HDPE matrix even with the presence of an organic compatibilizer. The theoretical elastic moduli of the four kinds of polymer/GO nanocomposites calculated by using the Halpin–Tsai model or a combination of Laminate theory and Mori–Tanaka model underestimated the experimental results. Considering the interfacial interactions, an effective volume fraction was introduced to the above composite models which interpreted the experimental data well. The interphase zone was thus quantified by using micromechanical modeling based on the measured mechanical properties of polymer/GO nanocomposites.
Starting Page	3637
Ending Page	3646
Page Count	10
File Format	HTM / HTML PDF
ISSN	09599428
Volume Number	22
Issue Number	8
Journal	Journal of Materials Chemistry
DOI	10.1039/c2jm15062j
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	PLLA PCL Halpin Tsai Tanaka Graphene Polymer Composite material Polyethylene London dispersion force Surface science Aspect ratio Elastic modulus Interphase
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry

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