高等学校化学学报 ›› 2023, Vol. 44 ›› Issue (4): 20220615.doi: 10.7503/cjcu20220615

• 高分子化学 • 上一篇    下一篇

电纺聚苯胺涂层表面浸润性和表面荷电对微生物附着的影响

巴迪迪, 赵海洲, 张志明(), 于良民()   

  1. 中国海洋大学化学化工学院, 海洋化学理论与工程技术教育部重点实验室, 青岛 266100
  • 收稿日期:2022-09-14 出版日期:2023-04-10 发布日期:2022-12-14
  • 通讯作者: 张志明,于良民 E-mail:zzmcyj@ouc.edu.cn;yuyan@ouc.edu.cn
  • 基金资助:
    国家重点研发计划项目(2019YFC0312102);国家自然科学基金-山东联合基金(U1706225)

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)

摘要:

材料表面浸润性和表面荷电对微生物在材料表面的附着有着非常重要的影响. 本文采用静电纺丝法在不锈钢电极表面分别制备了疏水和亲水的聚苯胺纤维涂层, 利用电化学阻抗谱监测大肠杆菌在两种聚苯胺纤维涂层表面的附着情况. 结果表明, 亲水表面有利于抑制大肠杆菌的附着. 通过电化学极化使亲水表面分别带正电荷和负电荷, 利用平板涂布计数法研究了不同极化时间下两种荷电表面的抑菌率, 发现无论正电荷还是负电荷都有利于抑制微生物附着, 而且二者没有明显差异. 在相同的阴极极化条件下, 亲水和疏水的聚苯胺纤维涂层抑菌性能相差不大, 说明对于电纺聚苯胺涂层抑制细菌附着而言, 电化学极化的影响大于表面浸润性的影响.

关键词: 表面浸润性, 表面电荷, 大肠杆菌, 电化学交流阻抗谱, 抑菌率

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

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