尼龙无铬粗化与无钯活化的金属化过程

Metallization process of PA10T with chrome-free roughening and palladium-free activation

摘要:

为取代传统的铬酐粗化和胶体钯活化的化学镀前处理工艺，通过一种绿色环保的方法实现尼龙 (PA10T) 表面金属层的制备.利用傅里叶红外光谱仪、X射线光电子能谱仪研究前处理过程中尼龙表层官能团分布及价键变化，并建立模型阐述金属化过程.结果表明：采用硫酸-乙醇的粗化体系可达到粗化效果，使PA10T中酰胺键断裂并生成氨基和羧基; 采用无钯活化工艺时通过Cu²⁺与氨基、羧基的配位使尼龙表面活化得以实现.通过上述简易、环保的方法可以在PA10T表面得到结合力良好的镀层，采用电子万能材料试验机测试镀层结合力达到537 N·cm^-2.

Abstract:

In order to replace the traditional pretreatment process for electroless plating of chromic acid roughening and colloid palladium activation, the metal layer was prepared on the surface of nylon (PA10T) through a green method. The distribution of functional groups and the change of valence bonds on the nylon surface were characterized by Fourier transform infrared spectrometry and X ray photoelectron spectrometry, and then a model was established to illustrate the metallization process. The results show that the roughening system of sulphuric acid-ethanol can be used to achieve the effect of roughening, make the amide bond rupture and generate amino and carboxyl in PA10T. When the palladium-free activation process is adopted, the surface activation of nylon could be achieved by the coordination of Cu²⁺ with amino groups and carboxyl groups. The simple and environmentally friendly method mentioned above could get a good adhesion of the metal coating on the PA10T surface, the coating binding force reaches 537 N·cm^-2 which is tested by electronic universal material testing machine.