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Polystyrene grafted multi-walled carbon nanotubes.

M S P Shaffer¹, K Koziol

¹Department of Materials Science & Metallurgy, University of Cambridge, Pembroke Street, Cambridge, UK CB2 3QZ. msps100@cam.ac.uk

Chemical Communications (Cambridge, England)

|October 3, 2002

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Oxidised, multi-walled, carbon nanotubes were grafted with polystyrene using radical polymerisation. This modification significantly enhanced their solubility and suitability for advanced nanocomposite applications.

Area of Science:

Materials Science
Polymer Chemistry
Nanotechnology

Background:

Carbon nanotubes (CNTs) possess unique properties but often suffer from poor solubility.
Improving CNT solubility is crucial for their integration into various applications, especially nanocomposites.

Purpose of the Study:

To graft polystyrene onto oxidised, multi-walled carbon nanotubes (o-MWCNTs).
To enhance the solubility and processability of o-MWCNTs for nanocomposite fabrication.

Main Methods:

In situ radical polymerisation was employed to graft polystyrene chains onto the surface of o-MWCNTs.
The reaction conditions were optimised to achieve efficient grafting.

Main Results:

Successful grafting of polystyrene molecules onto oxidised, multi-walled carbon nanotubes was confirmed.

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The modified CNTs exhibited dramatically improved solubility in common organic solvents.

Enhanced dispersibility and compatibility within polymer matrices were observed.

Conclusions:

Grafting polystyrene onto o-MWCNTs via in situ radical polymerisation is an effective strategy to improve their solubility.
This surface modification significantly broadens the potential applications of CNTs in nanocomposite materials.