| 초록 |
Nano-scaled polyaniline (PANI) particles dispersed in poly(vinyl butyral) (PVB) matrix which is familiar as adhesives, films, and binders, were prepared by an in-situ butyralization reaction of the PANI dispersion in aqueous poly(vinyl alcohol) (PVA) solution. First, the PANI dispersion was obtained by polymerization of aniline in acidic solution of PVA of which is a steric stabilizer. The PANI particles were spherical with uniform diameter about 100nm. The butyalization was then carried out in a reactor with PANI dispersion. N-butyraldehyde was added to the dispersion at 10℃ and the reaction mixture was heated up to 55 ℃ for 3 hours with continuous stirring. During the reaction, PVB containing PANI particles was precipitated, because of the water insolubility of PVB. The separated PVB-PANI composite was then washed three times with deionized water. The PANI particles were analyzed by both a microscopic method and dynamic light scattering. Electric properties of composites were also investigated as functions of particle concentration, dopants for PANI, and particle diameter.
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