| Ag@SiO2纳米复合涂层在大肠杆菌作用下的电化学阻抗谱研究 |
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| 引用本文： | 张新生,王洁欣,乐园,陈建峰. Ag@SiO2纳米复合涂层在大肠杆菌作用下的电化学阻抗谱研究[J]. 北京化工大学学报(自然科学版), 2011, 38(5): 35-39 |
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| 作者姓名： | 张新生 王洁欣 乐园 陈建峰 |
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| 作者单位： | 北京化工大学纳米材料先进制备技术与应用科学教育部重点实验室,北京,100029;北京化工大学纳米材料先进制备技术与应用科学教育部重点实验室,北京,100029;北京化工大学纳米材料先进制备技术与应用科学教育部重点实验室,北京,100029;北京化工大学纳米材料先进制备技术与应用科学教育部重点实验室,北京,100029 |
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| 基金项目： | 国家自然科学基金,国家“863”计划 |
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| 摘 要： | 研究了添加不同含量Ag@SiO2 纳米材料的环氧树脂涂层在大肠杆菌溶液中浸泡前和浸泡110h后的电化学阻抗谱特征,分别提出了其等效电路模型,并比较了浸泡前和浸泡850h后的涂层形貌变化。结果表明,浸泡后未添加Ag@SiO2 的涂层的阻抗降低了96%,添加0.3%的Ag@SiO2 涂层的阻抗也下降了73%,且两者都出现了明显的锈斑;而添加0.1%的Ag@SiO2 涂层的阻抗和形貌在浸泡前后基本保持不变。可见,添加适量的Ag@SiO2 可以显著提高涂层的耐微生物腐蚀性能。
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| 关 键 词： | 纳米复合涂层 大肠杆菌 耐腐蚀性 电化学阻抗谱 |
| 收稿时间： | 2011-03-21 |
Electrochemical impedance spectroscopic studies of the effect of Ag@ SiO2 nanocomposites on the corrosion of epoxy coatings influenced in the presence of Escherichia coli |
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| ZHANG XinSheng,WANG JieXin,LE Yuan,CHEN JianFeng. Electrochemical impedance spectroscopic studies of the effect of Ag@ SiO2 nanocomposites on the corrosion of epoxy coatings influenced in the presence of Escherichia coli[J]. Journal of Beijing University of Chemical Technology, 2011, 38(5): 35-39 |
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| Authors: | ZHANG XinSheng WANG JieXin LE Yuan CHEN JianFeng |
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| Affiliation: | Key Laboratory for Nanomaterials, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China |
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| Abstract: | Electrochemical impedance spectra (EIS) of epoxy coatings pigmented with Ag@SiO2 nanoparticles at different concentrations were recorded before and after immersion for 110 h in Escherichia coli (E. coli ) solution. Corresponding equivalent circuits for the coatings were proposed, and their surface topography before and after immersion for 850 h in E. coli solution was compared. The results showed that after immersion, the resistance of coatings with zero and 0.3% mass ratio of Ag@SiO2 pigment to resin decreased by 96% and 73%, respectively. Obvious corrosion spots were found on the surfaces of both coatings. However, there was little change in either resistance or topography of the coating containing 0.1% Ag@SiO2. This shows that the addition of an appropriate amount of Ag@SiO2 can increase the microbiological corrosion resistance of coatings. nanoparticles at different concentrations were recorded before and after immersion for 110 h in Escherichia coli (E. coli solution. Corresponding equivalent circuits for the coatings were proposed, and their surface topography before and after immersion for 850 h in E. coli solution was compared. The results showed that after immersion, the resistance of coatings with zero and 0.3% mass ratio of Ag@SiO2 pigment to resin decreased by 96% and 73%, respectively. Obvious corrosion spots were found on the surfaces of both coatings. However, there was little change in either resistance or topography of the coating containing 0.1% Ag@SiO2. This shows that the addition of an appropriate amount of Ag@SiO2 can increase the microbiological corrosion resistance of coatings. |
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