Abstract: The large energy consumption and high cost in the fields of transportation and electronics industries have been triggering the urgent demand for lighter and stronger products. Especially in the field of electronics packaging, metal/polymer compo-sites have gradually prevailed over metallic or polymer materials due to their lightweight, easy processing and high strength. Metal/polymer composites consist of metal and polymer phases which combined with each other by interpenetrating interfaces. The chemical interaction and physical anchor effect endow with high bonding strength of the resultant composites. Despite of the interfaces between two phases, metal and polymer still exhibit their own intrinsic properties. How to achieve the strong bonding between metals and polymers is the biggest challenge to the fabrication of metal/polymer composites. Owing to the property disparity between metals and polymers, the processing techniques applicable for metal/polymer composites are quite different from either welding for metals or melt mixing for polymers. The development of an efficient and low-cost processing technique to obtain high-performance metal/polymer composites has hence become a hot topic in this field. The currently feasible routes to produce metal/polymer composites include lamination, laser bonding, friction stitch welding, friction stir welding, ultrasonic bonding and nano-molding. Among them, lamination can only be used to fabricate products with simple and large-size structure. Laser bonding, friction stitch welding and friction stir welding could induce scars to the surfaces of products. Ultrasonic bonding needs relatively complicated processing procedures. In comparison, nano-molding technology (NMT) can achieve the integrated fabrication of metal/polymer composites while mutually ensure the strong bonding between metal and polymer as well as the flexible design of products. Therefore, NMT has acquired extensive research interest as a predominant processing technique for fabricating metal/polymer composites. For the sake of manufacturing more favorable metal/polymer composites, there have been continuous endeavors to explore and improve the mechanism and process regime of NMT. By now, the basically recognized mechanism of NMT is: Ⅰ. The heat generated by exothermic reactions between amine compounds and polymers promotes the flow of polymer melt in nanostructures on the metal surface; Ⅱ. The solidification of polymers embedded in the metals forms the “anchors” at the polymer/metal interface, thereby significantly enhancing the composite’s bonding strength. The metals applicatory for NMT have been extended from aluminum alloy to copper, stainless steel, titanium and magnesium, also, the polymer species which can be adapted for NMT have proliferated to a range of resins such as PPS, PBT, PEEK, PPA and PA. This review gives summary descriptions over the bonding mechanism, manufacture processes, performance test, technological advances and applications with respect to NMT, as well as a prospective discussion on the future development trends and some unresolved key problems.
李颖, 梅园, 王颖, 孟凡彬, 周祚万. 面向金属/树脂复合材料的纳米注塑成型技术综述[J]. 《材料导报》期刊社, 2018, 32(13): 2295-2303.
LI Ying, MEI Yuan, WANG Ying, MENG Fanbin, ZHOU Zuowan. The State-of-art of Nano-molding Technique Applying to the Production of Metal/Polymer Composites. Materials Reports, 2018, 32(13): 2295-2303.
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2018, Vol. 32 
