A facile method for grafting hyperbranched poly(thiol ether-ester) onto MWCNTs via thiol-yne click chemistry and their dispersion and oxidation responsive properties

摘要

A novel and facile approach was described to graft hyperbranched poly(thiol ether-ester) (HPTEE) onto the multi-walled carbon nanotubes (MWCNTs) via thiol-yne click chemistry. The covalent grafting between HPTEE and MWCNTs was characterized through FT-IR, TGA, XPS and TEM techniques. Experimental results indicate that HPTEE chains were covalently grafted onto MWCNTs surface. The grafting content of HPTEE is about 22.9%, and the thickness of HPTEE grafted on MWCNTs is about 3-5 nm. The results of dispersibility test indicate that the dispersion stability of the MWCNTs-HPTEE in water was greatly improved as compared with the raw MWCNTs. Additionally, we demonstrate that the obtained MWCNTs-HPTEE were tested to be oxidation responsive because of the presence of oxidizable thioether groups in the grafting of hyperbranched polymers on the MWCNTs surface.

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