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Facile Synthesis of Aqueous‐dispersible Nano‐PEDOT:PSS‐ co ‐MA Core/Shell Colloids Through Spray Emulsion Polymerization
Author(s) -
Han YuKai,
Yih JenqNan,
Chang MeiYing,
Huang WenYao,
Ho KoShan,
Hsieh TarHwa,
Lou JhihGong
Publication year - 2011
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201000495
Subject(s) - pedot:pss , materials science , polymerization , chemical engineering , scanning electron microscope , emulsion polymerization , x ray photoelectron spectroscopy , raman spectroscopy , aqueous solution , polymer chemistry , nanotechnology , chemistry , polymer , organic chemistry , composite material , physics , optics , engineering , layer (electronics)
This paper describes a novel spray emulsion polymerization technique for the preparation of aqueous‐dispersible nanoscale core/shell poly(3,4‐ethylenedioxythiophene) (n‐PEDOT) colloids doped with poly[(4‐styrenesulfonic acid)‐ co ‐(maleic acid)] (PSS‐ co ‐MA). Scanning electron microscopy and transmission electron microscopy images revealed that these n‐PEDOT:PSS‐ co ‐MA colloids possessed sharp core/shell morphologies. X‐ray diffraction and Raman spectroscopy measurements revealed semi‐crystalline morphologies and quinoid‐dominated structures for these n‐PEDOT:PSS‐ co ‐MA colloids. The conductivities of n‐PEDOT and n‐PEDOT:PSS‐ co ‐MA pellets were ca. 3.2 and 0.29 S · cm −1 , respectively, suggesting that PSS‐ co ‐MA acted as a shell that blocked the hopping of charges from the n‐PEDOT core to neighboring latexes. The work functions of pristine n‐PEDOT and n‐PEDOT:PSS‐ co ‐MA, measured using photoelectron spectroscopy, were ca. 4.7 and 5.05 eV, respectively; thus, they are close to that of indium tin oxide. The PSS‐ co ‐MA used in this study featured two different types of interactive functional groups, which acted as oxidative sites, dopants, and core/shell stabilizers during polymerization.