Journal
MACROMOLECULAR CHEMISTRY AND PHYSICS
Volume 214, Issue 13, Pages 1415-1422Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/macp.201300054
Keywords
core-shell materials; electrorheological fluids; graphene oxide; microspheres
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Funding
- National Research Foundation, Korea [39704-1]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10037237] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2009-0080253, 2009-0076451] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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This paper reports a facile approach for fabricating core-shell structured graphene oxide (GO)-wrapped amine-modified poly(glycidyl methacrylate) (ami-PGMA) microspheres. The resulting core-shell structure is confirmed by scanning electron micsroscopy (SEM) and transmission electron microscopy (TEM), whereas the coexistence of GO and PGMA is confirmed by FTIR spectroscopy. The thermal stability of the ami-PGMA/GO microspheres is enhanced compared with that of pure PGMA microspheres. The novel ami-PGMA/GO composite microsphere-based electrorheological (ER) fluid shows typical ER characterization, using a rotational rheometer under an applied electric field. The dielectric analysis results along with the relaxation time and achievable polarizability of the fluid are correlated with the ER performance using a LCR meter.
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