Polymer brush synthesis on surface modified carbon nanotubes via in situ emulsion polymerization
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In situ emulsion polymerization was employed for synthesizing carbon nanotube (CNT) composites in a colloidal system with poly(styrene) or PS to form nanostructured brush. CNTs were initially functionalized with oleic acid, followed by silanization with (3-aminopropyl) triethoxysilane to impart cross-linking properties. Styrene monomers were efficiently grafted to surface modified CNT via emulsion polymerization with variable CNT concentrations. FTIR analyses of the functionalized CNT and PS/CNT composites confirmed the bond formation and effectiveness of the developed experimental method. X-ray photoelectron spectroscopy confirmed the presence of the desired bonds and the composition of the composites. Structural properties of the composites characterized by TEM confirmed excellent deagglomeration and dispersion of CNTs in PS/CNT composite. Thermal characteristics from TGA and DSC data showed enhanced properties for the nanocomposites as a function of the CNT content. BET measurements indicated significant improvements in surface area and pore volume with enhancements in gas sorption for the polymer nanocomposites.
KeywordsCarbon nanotube Nanocomposite Silanization Polymer brush Emulsion polymerization
Support from the University of Sydney is acknowledged for conducting part of the research. Assistance with the XPS analysis from UNSW is also acknowledged.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
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