State Key Laboratory of Polymer Materials Engineering of China, Polymer Research Institute, Sichuan University , Chengdu 610065, China.
ACS Appl Mater Interfaces. 2017 Mar 15;9(10):8996-9005. doi: 10.1021/acsami.6b15828. Epub 2017 Feb 28.
Recently, metallization on polymer substrates has been given more attention due to its outstanding properties of both plastics and metals. In this study, the metal oxide composite of copper-chromium oxide (CuO·CrO) was incorporated into the polymer matrix to design a good laser direct structuring (LDS) material, and the well-defined copper pattern (thickness =10 μm) was successfully fabricated through selective metallization based on 1064 nm near-infrared pulsed laser activation and electroless copper plating. We also prepared polymer composites incorporated with CuO and CrO; however, these two polymer composites both had very poor capacity of selective metallization, which has no practical value for LDS technology. In our work, the key reasons causing the above results were systematically studied and elucidated using XPS, UV-vis-IR, optical microscopy, SEM, contact angle, ATR FTIR, and so on. The results showed that 54.0% Cu in the polymer composite of CuO·CrO (the amount =5 wt %) is reduced to Cu (elemental copper) after laser activation (irradiation); however, this value is only 26.8% for the polymer composite of CuO (the amount =5 wt %). It was confirmed that to achieve a successful selective metallization after laser activation, not only was the new formed Cu (the catalytic seeds) the crucial factor, but the number of generated Cu catalytic seeds was also important. These two factors codetermined the final results of the selective metallization. The CuO·CrO is very suitable for applications of fabricating metallic patterns (e.g., metal decoration, circuit) on the inherent pure black or bright black polymer materials via LDS technology, which has a prospect of large-scale industrial applications.
最近，由于塑料和金属的优异性能，聚合物衬底上的金属化受到了更多的关注。在这项研究中，将铜-氧化铬（CuO·CrO）金属氧化物复合材料掺入聚合物基质中，设计出一种良好的激光直接成型（LDS）材料，并通过基于 1064nm 近红外脉冲激光激活和化学镀铜的选择性金属化成功制备了定义良好的铜图案（厚度=10μm）。我们还制备了掺入 CuO 和 CrO 的聚合物复合材料；然而，这两种聚合物复合材料的选择性金属化能力都非常差，对于 LDS 技术没有实际价值。在我们的工作中，使用 XPS、UV-vis-IR、光学显微镜、SEM、接触角、ATR FTIR 等系统地研究和阐明了导致上述结果的关键原因。结果表明，在激光激活（辐照）后，聚合物复合材料中 54.0%的 CuO·CrO（含量=5wt%）还原为 Cu（金属铜），而 CuO（含量=5wt%）的聚合物复合材料中仅为 26.8%。经确认，为了在激光激活后成功实现选择性金属化，不仅新形成的 Cu（催化种子）是关键因素，而且生成的 Cu 催化种子的数量也很重要。这两个因素共同决定了选择性金属化的最终结果。CuO·CrO 非常适合通过 LDS 技术在固有纯黑或亮黑聚合物材料上制造金属图案（例如，金属装饰、电路），具有大规模工业应用的前景。
