Multiwalled carbon nanotubes grafted with polyamidoamine (PAMAM) dendrimers and their influence on polystyrene supercritical carbon dioxide foaming

- We prepared multiwalled carbon nanotubes (MCNTs) with various surface modifications.
- Nucleation effects of different MCNTs on polystyrene supercritical CO2 foaming.
- Short MCNTs showed more significant nucleation effect compared to the long ones.
- Introducing polyamidoamine dendrimers on MCNTs enhanced nucleation efficiency.