Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, and School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710062 , China.
State Key Laboratory of Environmental Adaptability for Industrial Products , China National Electric Apparatus Research Institute Co., Ltd , Guangzhou 510663 , China.
ACS Appl Mater Interfaces. 2019 Feb 6;11(5):5517-5525. doi: 10.1021/acsami.8b18209. Epub 2019 Jan 24.
Fabrication of stable and functional patterns on the surface of PTFE remains a great technical challenge owing to its inertness and high hydrophobicity. Here, we report for the first time the fabrication of functional micropatterns on the PTFE surface by selectively irradiating plasma-treated PTFE coated with the monomer solution. A series of uniform highly dense poly(dopamine methacrylamide) (denoted as PDMA) line patterns with line/pitch widths of 20/20 and 50/50 μm are fabricated on the surface of PTFE (denoted as PDMA-p/PTFE) using dopamine methacrylamide (DMA) as the monomer. Surface graft copolymerization occurs and is attributed to the universal adsorption of DMA and the low grafting energy barrier, compared with the polymerization energy barrier, which is also demonstrated by the DFT calculations. Further, robust well-defined metal Ag or Cu patterns with strong adhesion strength are fabricated on the surface of the PTFE film by electroless deposition and are demonstrated for applications in flexible electronics. The approach is demonstrated to be versatile for fabrication of PDMA micropatterns onto a wide range of polymeric substrates, including polypropylene and acrylonitrile butadiene styrene.
由于聚四氟乙烯（PTFE）具有惰性和高疏水性，因此在其表面制造稳定且功能齐全的图案仍然是一项重大技术挑战。在这里，我们首次报道了通过选择性地辐照等离子体处理的涂覆有单体溶液的 PTFE 来在 PTFE 表面制造功能微图案。使用多巴胺甲基丙烯酰胺（DMA）作为单体，在 PTFE（表示为 PDMA-p/PTFE）表面上制造了一系列具有 20/20 和 50/50μm 线宽/线距的均匀高密度聚（多巴胺甲基丙烯酰胺）（表示为 PDMA-p/PTFE）线图案。表面接枝共聚的发生归因于 DMA 的普遍吸附和与聚合能垒相比的低接枝能垒，这也通过 DFT 计算得到了证明。此外，通过化学镀在 PTFE 薄膜表面上制造了具有强附着力的坚固、明确的金属 Ag 或 Cu 图案，并展示了在柔性电子中的应用。该方法被证明适用于在包括聚丙烯和丙烯腈丁二烯苯乙烯在内的各种聚合物基底上制造 PDMA 微图案。
