The supramolecular self-assembling of pyridine-containing amphiphilic block copolymers (PS-b- P4VP and PS-PI-P2VP) and 4-biphenylcarboxylic acid (BPCA) in selective solvents has been systematically studied. BPCA molecules are able to complex with the vinylpyridine (VP) moieties through hydrogen bonding, which leads to a transformation of spherical block copolymer micelles into structured nanofibers in solutions. The effects of molar ratio of BPCA to the VP repeat units, solvent selectivity, and copolymer composition on the supramolecular complex nanofiber formation have been systematically investigated by atomic force microscopy (AFM), transmission electron microscopy (TEM), and scanning electron microscopy (SEM). The formation mechanism of supramolecular self-assembly nanofibers was discussed.
Russian Journal of Applied Chemistry – Springer Journals
Published: Nov 24, 2016
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