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TitleEffect of additives on the in situ laccase-catalyzed polymerization of aniline onto bacterial cellulose
Author(s)Shim, Euijin
Noro, Jennifer Martins
Cavaco-Paulo, Artur
Silva, Carla
Kim, Hye Rim
Issue date17-Oct-2019
PublisherFrontiers Media S.A.
JournalFrontiers in Bioengineering and Biotechnology
CitationShim, Euijin; Jennifer Noro; Cavaco-Paulo, Artur; Silva, Carla; Kim, Hye Rim, Effect of additives on the in situ laccase-catalyzed polymerization of aniline onto bacterial cellulose. Frontiers in Bioengineering and Biotechnology, 7(264), 2019.
Abstract(s)Laccase-mediated systems are a green route to accelerate the oxidation of aniline and obtain polyaniline with conductive properties. The synthesis of green polyaniline (emeraldinesalt)washereinimprovedbytheinclusionofadditiveslikesodiumbis(2–ethyl hexyl) sulfosuccinate (AOT) and potassium hexacyanoferrate (II) (KHCF) in the medium. The aniline polymerization was confirmed by the detection of the absorption band typical of emeraldine salt at 420nm, typical of the semiquinoid radical cation, and of the polaron absorption band at 700–800nm, corresponding to the distinctive signal of doped or partial doped aniline. The oligomers and/or polymers obtained were characterized by spectrometry techniques, namely 1H NMR and MALDI-TOF, and the bacterial cellulose (BC) conductivity was assessed by means of a four-point probe electrical conductivity technique. The best polymerization results were obtained with 5mM AOT, 10mM KHCF, and 25 U/mL of laccase. The synergistic effect between both additives in the presence of a catalyst leads to obtaining BC samples coated with green polyaniline with promising electric conductive properties.
DescriptionThe Supplementary Material for this article can be found online at: 2019.00264/full#supplementary-material
Publisher version
AccessOpen access
Appears in Collections:CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series

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