Self-assembled silane film and silver nanoparticles coating on magnesium alloys for corrosion resistance and antibacterial applications
Self-assembled silane film and silver nanoparticles coating on magnesium alloys for corrosion resistance and antibacterial applications
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DOI：
10.1007/s40195-013-0397-0
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发表时间：
2013-11
期刊：
影响因子：
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通讯作者：
R. Zeng;Li-Jun Liu;Shuoqi Li;Yu-hong Zou;Fen Zhang;Yanan Yang;H. Cui;E. Han
中科院分区：
文献类型：
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作者：
R. Zeng;Li-Jun Liu;Shuoqi Li;Yu-hong Zou;Fen Zhang;Yanan Yang;H. Cui;E. Han
微生物附着在镁合金上造成的污染在许多应用中是非常常见的。采用自组装技术将银纳米粒子（AgNPs）固定在镁合金表面制备抗菌复合涂层。通过部分质子化的氨基与带负电荷的柠檬酸盐修饰的AgNPs之间的静电相互吸引，将AgNPs固定在3-氨丙基三甲氧基硅烷（APTMS）修饰的镁合金AZ 31（APTMS/Mg）表面，得到AgNPs/APTMS/Mg（AgNPs/APTMS/Mg）。采用紫外-可见光谱（UV-vis）、傅里叶变换红外光谱（FTIR）、扫描电镜（SEM）和电化学方法对所制备的Ag胶体和功能化AZ 31合金进行了表征。最后，通过抑菌圈评价AgNPs/APTMS/Mg底物对大肠杆菌的杀菌活性。结果表明，Si-O-Si共价键存在于基体表面，形成了无机Si-O-Mg键。银纳米粒子被固定和良好的分散，形成一个均匀的亚单层的硅烷膜上的两个维度。经AgNPs/APTMS预处理的AZ 31合金具有较好的耐腐蚀性能和抗菌性能。
Contamination resulting from microbial adhesion on magnesium alloys is very common in many applications. Self-assembly technology was employed to prepare an antibacterial composite coating by fixing silver nanoparticles (AgNPs) onto the surface of magnesium alloys. The AgNPs were immobilized on the surface of 3-aminopropyltrimethoxysilane (APTMS)-modified magnesium alloy AZ31 (APTMS/Mg) through electrostatic inter-attraction between partially protonated amino groups and negatively charged citrate-capped AgNPs, resulting in the AgNPs attached APTMS/Mg (AgNPs/APTMS/Mg) substrate. The prepared Ag colloid and functionalized AZ31 alloy were characterized by ultraviolet-visible (UV-vis) spectroscopy, Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and electrochemical methods. Finally, the bactericidal activity of AgNPs/APTMS/Mg substrate againstEscherichia coliwas assessed by the inhibition zone. The results demonstrated that Si-O-Si covalent bonds existed on the substrate with the formation of inorganic Si-O-Mg bonds. AgNPs were immobilized and well-dispersed, forming a uniform submonolayer on the silane film in two dimensions. The AgNPs/APTMS-pretreated AZ31 alloys exhibited better corrosion resistance and excellent antibacterial performance.