Oligoaniline-containing supramolecular block copolymer nanodielectric materials

Macromolecular Rapid Communications
Christopher G HardyChuanbing Tang

Abstract

We report a new generation of nanodielectric energy storage materials based on supramolecular block copolymers. In our approach, highly polarizable, conducting nanodomains are embedded within an insulating matrix through block copolymer microphase separation. An applied electric field leads to electronic polarization of the conducting domains. The high interfacial area of microphase-separated domains amplifies the polarization, leading to high dielectric permittivity. Specifically, reversible addition fragmentation transfer (RAFT) polymerization was used to prepare block copolymers with poly(methyl acrylate) (PMA) as the insulating segment and a strongly acidic dopant moiety, poly-(2-acrylamido-2-methyl-1-propanesulfonic acid) (PAMPSA), as the basis for the conducting segment. The PAMPSA block was complexed with an oligoaniline trimer to form a dopant-conjugated moiety complex that is electronically conductive after oxidation. For the undoped neat block copolymers, the increase of the PMA block length leads to a transition in dielectric properties from ionic conductor to dielectric capacitor with polarization resulting from migration of protons within the isolated PAMPSA domains. The oligoaniline-doped copolymers show remarkabl...Continue Reading

References

Jun 22, 2006·Journal of the American Chemical Society·Yingying LuQing Wang
Nov 16, 2006·Journal of the American Chemical Society·Meng GuoTheodore Goodson
Jun 10, 1983·Science·A J Lovinger
Sep 23, 2009·ACS Nano·Stephen Ducharme
Sep 29, 2011·The Journal of Physical Chemistry. B·Meng GuoTheodore Goodson

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