کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1614256 1645420 2013 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of various surfactants on the dispersion stability and electrical conductivity of surface modified graphene
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Effects of various surfactants on the dispersion stability and electrical conductivity of surface modified graphene
چکیده انگلیسی

Ionic and non-ionic surfactant functionalized, water dispersible graphene were prepared to investigate the effects on the dispersion stability and electrical conductivity of graphene. In this study, sodium dodecyl benzene sulfonate (SDBS), sodium dodecyl sulfate and 4-(1,1,3,3-tetramethylbutyl) phenyl-polyethylene glycol (Triton X-100) were used as ionic and non-ionic surfactants. The effects of surfactant concentrations on the dispersibility and electrical conductivity of the surface modified graphene were investigated. The dispersion stability of SDBS functionalized graphene (SDBS-G) was found to be best in water at 1.5 mg ml−1. X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy analysis indicate that the presence of surfactants does not prevent the reduction of graphene oxide (GO). These measurements also demonstrated that the surfactants were present on the surface of graphene, resulting in the formation of functionalized graphene. The thickness of different functionalized graphene was measured by Atomic force microscopy and varied significantly with different surfactants. The thermal properties of the functionalized graphene were also found to be dependent on the nature of the surfactants. The electrical conductivity of SDBS-G (108 S m−1) was comparatively higher than SDS and Triton X-100 functionalized graphene.

.Figure optionsDownload as PowerPoint slideHighlights
► Water dispersible graphene has been prepared using ionic and non-ionic surfactants.
► XPS and FTIR spectra analysis confirm surface modification and reduction of GO.
► The highest water dispersibility is observed in the graphene modified with of SDBS.
► The best properties of modified graphene is achieved with GO/surfactant ratio of two.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 562, 15 June 2013, Pages 134–142
نویسندگان
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