添加到聚脲涂层中的银纳米颗粒对硫酸盐还原菌活性和电化学性能的影响；一项环境纳米生物技术研究。
Effects of silver nanoparticles added into polyurea coating on sulfate-reducing bacteria activity and electrochemical properties; an environmental nano-biotechnology investigation.
作者信息
Karimi-Maleh Hassan, Mousavi Seyed Jafar, Mahdavian Majid, Khaleghi Mouj, Bordbar Sajjad, Yola Mehmet Lütfi, Darabi Rozhin, Liu Mei
机构信息
School of Resources and Environment, University of Electronics Science and Technology of China (UESTC), 611731, China; Department of Chemical Engineering and Energy, Quchan University of Technology, Quchan, Iran; Department of Chemistry, University of Johannesburg, P.O. Box 17011, Doornfontein Campus, Johannesburg, 2028, South Africa.
Department of Chemical Engineering and Energy, Quchan University of Technology, Quchan, Iran.
出版信息
Environ Res. 2021 Jul;198:111251. doi: 10.1016/j.envres.2021.111251. Epub 2021 Apr 30.
In the present work, Ag nanoparticles were added to polyurea coating in order to improve its antibacterial and electrochemical properties in sulfide-reducing bacteria-containing media. To this end, Ag nano-powder was mixed with two component polyuria, and then the antibacterial behavior of the nanocomposite coating was studied in sulfate-reducing bacteria (SRB)-containing medium. The results revealed the inhibitory effects of nanocomposite coating on the formation of SRB biofilms on the samples. Moreover, the SRB population decreased in contact with the Ag nanoparticles-mixed coating over 7 days. Investigation of the growth and activity of the bacteria represented the effective antibacterial properties of Ag nanoparticles in the polyurea matrix. Furthermore, EIS (electrochemical impedance spectroscopy) measurements indicated that the corrosion properties of the nanocomposite coating improved considerably over 7 days. The coating resistance increased 2 times by adding Ag nanoparticles after 1 day and 3.3 times after 7 days. In accordance with the same results, the charge transfer resistance increased 1.5 times and 1.1 times by adding Ag nanoparticles after 1 day and 7 days, respectively. The improvement in the protective properties of the nanocomposite coating are reflected in the increase in both film and charge transfer resistance.
在本研究中，将银纳米颗粒添加到聚脲涂层中，以改善其在含硫酸盐还原菌的介质中的抗菌和电化学性能。为此，将银纳米粉末与双组分聚脲混合，然后在含硫酸盐还原菌（SRB）的介质中研究了纳米复合涂层的抗菌行为。结果表明，纳米复合涂层对样品上SRB生物膜的形成具有抑制作用。此外，在7天内，与含银纳米颗粒的涂层接触后，SRB数量减少。对细菌生长和活性的研究表明，银纳米颗粒在聚脲基质中具有有效的抗菌性能。此外，电化学阻抗谱（EIS）测量表明，在7天内，纳米复合涂层的腐蚀性能有显著改善。添加银纳米颗粒后，1天时涂层电阻增加了2倍，7天时增加了3.3倍。根据相同的结果，添加银纳米颗粒后，1天时电荷转移电阻增加了1.5倍，7天时增加了1.1倍。纳米复合涂层防护性能的改善体现在膜电阻和电荷转移电阻的增加上。
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