Abstract
As a typical double-crystalline diblock copolymer, polyethylene-b-poly(ethylene oxide) (PE-b-PEO) has been successfully modified on single-walled carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (MWCNTs) using a simple supercritical carbon dioxide (SC CO2) antisolvent-induced polymer epitaxy method. The characterization results of transmission electron microscopy (TEM) demonstrated that the unique double-crystalline block copolymer PE-b-PEO can be periodically decorated along carbon nanotubes (CNTs), leading to a novel amphiphilic nanohybird structure. The effect of different solvents on the decorated patterns of PE-b-PEO on CNTs has been discussed in this work. We found that the selectivity of solvent to the segments of block copolymer played a decisive role on the morphology of PE-b-PEO assembling on CNTs. When 1,2-dichlorobenzene (DCB) or p-xylene was used as the solvent, PE-b-PEO formed periodic patterns on CNTs, where the nanotube-induced PE crystallization was critical to the formation of...
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