Chem. J. Chinese Universities ›› 2023, Vol. 44 ›› Issue (4): 20220615.doi: 10.7503/cjcu20220615

• Polymer Chemistry • Previous Articles     Next Articles

Influence of Surface Wettability and Surface Charge on Microbial Adhesion of Electrospun Polyaniline Coatings

BA Didi, ZHAO Haizhou, ZHANG Zhiming(), YU Liangmin()   

  1. Key Laboratory of Marine Chemistry Theory and Technology,Ministry of Education,College of Chemistry and Chemical Engineering,Ocean University of China,Qingdao 266100,China
  • Received:2022-09-14 Online:2023-04-10 Published:2022-12-14
  • Contact: ZHANG Zhiming, YU Liangmin E-mail:zzmcyj@ouc.edu.cn;yuyan@ouc.edu.cn
  • Supported by:
    the National Key Research and Development Project of China(2019YFC0312102);the National Natural Science Foundation-Shandong Joint Fund, China(U1706225)

Abstract:

The surface wettability and surface charge of the materials have a very important influence on the attachment of microorganisms to the material surfaces. In this paper, two kinds of polyaniline fiber coatings, hydrophobic and hydrophilic, were prepared on the surface of stainless steel electrodes by electrospinning. Electrochemical impedance spectroscopy was used to monitor the adhesion of Escherichia coliE. coli) on the surfaces of the two polyaniline fiber coatings, and the results showed that the hydrophilic surface was beneficial to inhibit the adhesion of E. coli. Further, the hydrophilic surface was positively and negatively charged, respectively, by electrochemical polarization, and the bacteriostatic rate of two kinds of charge surface under different polarization times were studied by plate count method, and it was found that both positive and negative charges were beneficial to inhibit the attachment of microorganisms, and there was no significant difference between them. Moreover, under the same cathodic polarization conditions, the antibacterial properties of hydrophilic and hydrophobic polyaniline fiber coatings were not much different, indicating that the effect of electrochemical polarization on the inhibition of bacterial adhesion by electrospun polyaniline coatings is greater than that of surface wettability.

Key words: Surface wettability, Surface charge, Escherichia coli, Electrochemical impedance spectroscopy, Bacteriostatic rate

CLC Number: 

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