铝合金表面液相沉积抗菌层的性能研究

Antibacterial Film on Aluminum Alloy Surface Prepared by Liquid Phase Depositing

银可用作金属表面抗菌功能层的有效成分,从而拓宽金属材料在日用家电产品中的使用范围。为此,通过液相沉积的方法在铝合金表面制备出金属银的颗粒膜层,对沉积工艺、沉积膜层抗菌性能以及沉积层与基体结合力等进行了初步的探讨和研究。结果表明,通过液相沉积法在含1.0×10-3mol/L硝酸银、1.0mol/L己二胺配位剂、1.5×10-3mol/L硼氢化钾、pH值为13的溶液中,在300r/min搅拌下沉积1min,可在铝合金表面沉积出粒度为1μm以下的银颗粒,沉积层与铝合金基体有良好的结合力,蒸煮试验表明抗菌层无鼓泡、无脱落现象发生;铝合金抗菌层的表面抗菌测试结果表明,抗菌沉积层对大肠杆菌的杀菌率可达到96%以上。

As a kind of metal having good antibacterial properties, silver is characterized by high-efficiency, broad-spectrum resistance, nontoxicity and environmental protection. Therefore it is feasible to introduce Ag into the surface modification layer of metal materials so as to realize a wide application in household electric appliances. Thus Ag film was fabricated on aluminum alloy surface using liquid depositing method. The depositing process and the antibacterial properties and adhesion to the substrate surface of the Ag film were investigated. As the results, it was feasible to prepare Ag film of a particle size below 1 μm on the surface of aluminum alloy by stirring in the solution containing 1.0×10^-3 mol/L AgNO_3, 1.0 mol/L hexanediamine, and 1.5×10^-3 mol/L KHB with a pH value of 13 at a speed of 300 r/min for 1 min. The resulting Ag film had good adhesion to the Al alloy substrate and experienced no bubbling and cracking after tested in boiling steam. The surface antibacterial test results indicated that the Ag film formed on the aluminum alloy surface had a sterilizing rate above 96% against colibacillus.