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Large-compound vesicle-encapsulated multiwalled carbon nanotubes: A unique route to nanotube composites Part A Polymer chemistry
- Zou, Peng, Shi, Gang-Yin, Pan, Cai-Yuan
- Journal of polymer science 2009 v.47 no.14 pp. 3669-3679
- carbon nanotubes, composite polymers, encapsulation, hydrolysis, nanocomposites, silicon
- A simple and unique strategy for preparation of large-compound vesicle (LCV)-encapsulated multiwalled carbon nanotubes (MWCNTs) has been developed, and this involves dispersion of MWCNTs in H-shaped copolymers solution in DMF and encapsulation of MWCNTs with LCVs formed from hydrolysis and polycondensation of ----Si(OCH₃)₃ groups in the amphiphilic H-shaped copolymers, (PTMSPMA)₂PEG(PTMSPMA)₂. This unique noncovalent approach is nondestructive, and the original structure of MWCNTs remains in the resultant MWCNTs/LCVs nanocomposites. The morphologies of nanocomposites LCVs/MWCNTs are controlled by the chain length ratio (NPTMSPMA/NPEG) of PTMSPMA to PEG. For the H-shaped copolymers with NPMSPMA/NPEG [less-than or equal to] 1.7, they self-assembled to form LCVs with dense cavities in the presence of MWCNTs in a mixture of DMF/H₂O. When this ratio was more than 2.0, the large-compound micelle-wrapped MWCNTs were produced. This approach is potentially useful for preparation of MWCNTs encapsulated with various morphologies of polymers.