| 초록 |
We investigate the effect of casting solvent on the morphology of block copolymer / magnetic nanoparticle (NP) mixtures. Monodisperse maghemite NPs with surfaces modified with oleic acids have been synthesized and PS-b-PI, PS-b-PB, PS-b-PEO, and PS-b-P4VP, diblock copolymers showing cylindrical morphology were used as structure-directing matrices for the NPs. Four different solvents, hexane, toluene, THF, and CHCl3 were used to prepare film specimens by static casting and the interaction between mesophase-forming copolymers and NPs, which can be tuned by casting solvent, leads to remarkably different hybrid morphology. In order to characterize the structural change of block copolymers associated with different NP loadings small- angle x-ray scattering was performed and the structural information is in good agreement with transmission electron microscopy images. |
