Journal of East China Normal University(Natural Sc ›› 2019, Vol. 2019 ›› Issue (2): 164-173.doi: 10.3969/j.issn.1000-5641.2019.02.018

• Chemistry and Chemical Engineering • Previous Articles     Next Articles

pH induced regulation of the morphology and properties of polybenzidine submicron rods

WANG Lin1,2, ZHANG Yan-hui1,2, Arzugul MUSLIM1,2, Abida ABDUNAZAR1,2, LAN Hai-die1,2   

  1. 1. School of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi 830054, China;
    2. Engineering Research Center of Electrochemical Technology and Application, Xinjiang Normal University, Urumqi 830054, China
  • Received:2018-03-02 Online:2019-03-25 Published:2019-03-27

Abstract: Polybenzidine was prepared using micelles of the triblock copolymer PnBA28-b-PS75-b-P2VP104 as a template. The effects of different pH values on the morphology and properties of polybenzidine (PBZ) were investigated by regulating the pH value of the micellar solution of the templates. The molecular weight distribution and structure of the triblock copolymer PnBA28-b-PS75-b-P2VP104 were determined by size exclusion chromatography (SEC) and nuclear magnetic resonance spectroscopy (1H-NMR). The morphology and structure of the composites were characterized using a scanning electron microscope (SEM), transmission electron microscope (TEM), and Fourier transform infrared spectroscopy (FT-IR). The electrochemical capacitance of the composites was evaluated by chronopotentiometry. The effects of the pH value on the morphology, structure and properties of PBZ were explored in this study. The PBZ particles were submicron and micron rods with uniform distribution and a smooth surface. PBZ rods obtained at pH=5 had an average diameter that ranged from several tens to 200 nm. The uniformity of particle morphologies was found to decrease with an increase in pH value; A electrochemical performance test showed that the specific capacitance of PBZ reached 339.06 F/g at pH=5.

Key words: pH induced regulation, polybenzidine, lock copolymer template, morphology, capacitance

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