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Flattened‐Top Domical Droplet Formed by a Poly(pyrrole) Membrane
Author(s) -
Kim Hyejeong,
Kim Kiwoong,
Lee Sang Joon
Publication year - 2019
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.201800707
Subject(s) - materials science , polypyrrole , fabrication , membrane , nanotechnology , polymer , biocompatibility , surface tension , surface modification , polyaniline , ammonium persulfate , thin film , conductive polymer , chemical engineering , composite material , polymerization , medicine , alternative medicine , physics , pathology , biology , engineering , metallurgy , genetics , quantum mechanics
Polypyrrole (PPy) is a promising conductive polymer (CP) with electrical versatility, easy synthesis and functionalization, stability, and biocompatibility. Diverse architectures have been adopted to improve PPy performance, but the direct and precise patterning of various architectures remains challenging. Here, the unique formation of a PPy membrane on the air/water interface of a droplet solution containing ammonium persulfate and phytic acid is investigated. When a PPy thin film forms on the air/water interface, the top of the droplet rapidly flattens. The formation procedure and final structure of the PPy thin film are visualized and quantitatively investigated. Unlike the typical globular structure of PPy, the self‐assembled PPy film surface fabricated in this study is very organized and regularly shaped. This well‐ordered membrane may have a very high buckling strength greater than the surface tension of the solution. The proposed precise fabrication method is simple and inexpensive for fabricating patterned functional membranes. These results provide new insight into the fabrication of CP and their applications in various practical electromaterial engineering fields.