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Preparation of a novel antibacterial coating precursor and its antibacterial mechanism

机译：新型抗菌涂料前体的制备及其抗菌机理

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In this study, a novel antibacterial coating precursor was generated from multi-walled carbon nanotubes (MWCNTs) dispersed in an ethanol solution containing polysilazane. The antibacterial properties of this coating precursor were further improved by depositing silver nanoparticles on the surface of MWCNTs. The silver nanoparticles on Ag-MWCNTs were 3-10 nm in diameter and were attached tightly the surface of MWCNTs. A micro nanostructure was achieved on the surface of DH36 marine steel using this precursor. The prepared coating containing Ag-MWCNTs reveals an interwoven three-dimensional through-hole structure. Hydrophobic experiment results showed that the water contact angle of the as-prepared coating was over 150 degrees and sliding angle was below 1 degrees. The antibacterial property of superhydrophobic surface were characterized through an immersion test in the saturated E. coli bacteria solution. Flat colony counting method measurement indicated that the antibacterial rate of superhydrophobic surfaces modified by MWCNTs reached 85% compared to the untreated control group, and the antibacterial rate of superhydrophobic surfaces modified with Ag-MWCNTs increased to 92.9%.
机译：在这项研究中，从分散在含有聚硅氮烷的乙醇溶液中的多壁碳纳米管（MWCNT）产生了一种新型的抗菌涂层前体。通过在MWCNTs的表面沉积银纳米颗粒，可以进一步改善这种涂料前体的抗菌性能。 Ag-MWCNTs上的银纳米颗粒直径为3-10 nm，并紧密附着在MWCNTs的表面上。使用该前体在DH36船用钢的表面上实现了微纳米结构。所制备的包含Ag-MWCNT的涂层显示出交织的三维通孔结构。疏水性实验结果表明，所制备涂层的水接触角大于150度，滑动角小于1度。通过在饱和大肠杆菌溶液中的浸没测试来表征超疏水表面的抗菌性能。平板菌落计数法测量表明，与未处理的对照组相比，MWCNTs修饰的超疏水表面的抗菌率达到85％，而Ag-MWCNTs修饰的超疏水表面的抗菌率提高至92.9％。

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