Self-Assembly of Carbon Nanotubes Modified by Amphiphilic Block Polymers in Selective Solvent

✍ Scribed by Guojian Wang; Yuedong Liu

• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 722 KB
• Volume: 210
• Category: Article
• ISSN: 1022-1352
• DOI: 10.1002/macp.200900315

✦ Synopsis

Abstract

Block copolymers of polystyrene and poly(tert‐butyl methyacrylate) were prepared by ATRP. Halogen atoms at the chain ends were transformed into azide groups to obtain N~3~ terminated block copolymers, which were connected to the surface of multi‐walled carbon nanotubes (MWNTs) by reacting N~3~ with MWNT's surface. Amphiphilic diblock copolymer modified MWNTs were obtained after P__t__BMA blocks were hydrolyzed to polymethyacrylic acid (PMAA). Results showed that the amphiphilic diblock copolymer was grafted onto MWNTs by covalent bonds. TEM showed that they formed self‐assembly structures by hydrophilic/hydrophobic interaction in good solvents. As the block length of PMAA increased, the self‐assembly structures of amphiphilic MWNTs became increasingly ordered and uniform.

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