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Fabrication and Optical Properties of Electrospun Conductive Polymer Nanofibers from Blended Polymer Solution

2008; Institute of Physics; Volume: 47; Issue: 1S Linguagem: Inglês

10.1143/jjap.47.787

1347-4065

Surawut Chuangchote, Takashi Sagawa, Susumu Yoshikawa,

Advanced Sensor and Energy Harvesting Materials

Ultrafine poly[2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylene-vinylene] (MEH-PPV)/poly(vinyl pyrrolidone) (PVP) composite fibers with the average diameters ranging from 43 nm to 1.7 µm were prepared by electrospinning of blended polymer solutions in mixed solvent of chlorobenzene and methanol. The average diameter of the as-spun fibers was found to decrease into nanometer scale with decreasing the PVP concentration and/or addition of a volatile organic salt, pyridinium formate (PF). PVP was easily removed from MEH-PPV/PVP fibers by the Soxhlet extraction, and after the removal, pure MEH-PPV fibers were obtained as a ribbon-like structure aligned with wrinkled surface in fiber direction. Comparison with the cast film, as-spun fibers showed relatively higher crystallinity, higher conjugation length, and there was a remarkable blue shift of photoluminescence (PL) peak.