Noncovalent functionalization of multi-walled carbon nanotubes with amphiphilic polymers containing pyrene pendants |
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| Authors: | Aibo ZhangMeng Tang Jingfan LuanJianying Li |
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| Affiliation: | a School of Nature and Applied Science, Northwestern Polytechnical University, Xi'an,710072, Chinab State Key Laboratory of Electrical Insulation and Power Equipment, Xian Jiaotong University, Xi'an,710049, China |
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| Abstract: | A novel noncovalent approach was developed for the functionalization of multiwalled carbon nanotubes (MWNTs) using an amphiphilic copolymer of PVP-co-PAH containing pyrene pendants. A homogeneous polymer layer was formed on the surface of MWNTs, and the wrapped copolymer layer with a thickness of about 17.7 nm was found. The noncovalent modified MWNTs were dispersed very well in solvent of dimethylformamide (DMF), water and chloroform (CHCl3), and the high stability of dispersed suspensions could be maintained for more than 2 months without observed MWNT precipitation. In addition, the dispersing behavior of the noncovalent functionalized MWNTs by PVP-co-PAH in a solvent mixture of water/CHCl3 was also investigated, and it was found that a carbon nanotube layer was formed at the water/CHCl3 interface. |
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| Keywords: | Polymers Carbon nanotubes Pyrene pendants Noncovalent modification |
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