Laccase‐catalyzed synthesis of conducting polyaniline‐lignosulfonate composite |
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| Authors: | Ya Zhang Aixue Dong Xuerong Fan Qiang Wang Ying Zhang Yuanyuan Yu Artur Cavaco‐Paulo |
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| Affiliation: | 1. Key Laboratory of Science and Technology of Eco‐Textile, Ministry of Education, Jiangnan University, Wuxi, Jiangsu, China;2. International Joint Research Laboratory for Textile and Fibre Bioprocesses, Jiangnan University, Wuxi, Jiangsu, China;3. Department of Biological Engineering, University of Minho, Campus De Gualtar, Braga, Portugal |
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| Abstract: | Enzymatic polymerization of aniline was first performed in lignosulfonate (LGS) template system. High‐redox‐potential catalyst laccase, isolated from Aspergillus, was used as a biocatalyst in the synthesis of conducting polyaniline/lignosulfonate (PANI‐ES‐LGS) complex using atmospheric oxygen as the oxidizing agent. The linear templates (LGS), also serving as the dopants, could facilitate the directional alignment of the monomer and improve the solubility of the conducting polymer. The process of the polymerization was monitored using UV‐Vis spectroscopy, by which the conditions for laccase‐catalyzed synthesis of PANI‐ES‐LGS complex were also optimized. The structure characterizations and solubility of the complex were carried out using corresponding characterization techniques respectively. The PANI‐ES‐LGS suspensions obtained was used as coating for cotton with a conventional padder to explore the applications of the complex. The variable optoelectronic properties of the coated cotton were confirmed by cyclic voltammetry and color strength test. The molecular weight changes of LGS treated by laccase were also studied to discuss the mechanism of laccase catalyzed aniline polymerization in LGS template system. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133, 42941. |
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| Keywords: | applications biosynthesis of polymers conducting polymers |
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