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231224s2012 xx |||||o 00| ||eng c |
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|a 10.1021/la3009283
|2 doi
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|a eng
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1 |
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|a Zhang, Wen Ling
|e verfasserin
|4 aut
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|a Silica-graphene oxide hybrid composite particles and their electroresponsive characteristics
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|c 2012
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Completed 17.08.2012
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|a Date Revised 01.05.2012
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a Silica-graphene oxide (Si-GO) hybrid composite particles were prepared by the hydrolysis of tetraethyl orthosilicate (TEOS) in the presence of hydrophilic GO obtained from a modified Hummers method. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images provided visible evidence of the silica nanoparticles grafted on the surface of GO, resulting in Si-GO hybrid composite particles. Energy dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD) spectra indicated the coexistence of silica and GO in the composite particles. The Si-GO hybrid composite particles showed better thermal stability than that of GO according to thermogravimetric analysis (TGA). The electrorheological (ER) characteristics of the Si-GO hybrid composite based ER fluid were examined further by optical microscopy and a rotational rheometer in controlled shear rate mode under various electric field strengths. Shear stress curves were fitted using both conventional Bingham model and a constitutive Cho-Choi-Jhon model. The polarizability and relaxation time of the ER fluid from dielectric spectra measured using an LCR meter showed a good correlation with its ER characteristics
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|a Journal Article
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|a Choi, Hyoung Jin
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 28(2012), 17 vom: 01. Mai, Seite 7055-62
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|x 1520-5827
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|g volume:28
|g year:2012
|g number:17
|g day:01
|g month:05
|g pages:7055-62
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|u http://dx.doi.org/10.1021/la3009283
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