Abstract
In this study, shape memory polyurethane (SMP) foaming material is used as the main material that is incorporated with carbon fiber woven fabrics via two-step foaming method, forming sandwich-structured composite planks. The process is simple and efficient and facilitates any composition as required. The emphasis of this study is protection performances, involving puncture resistance, buffer absorption, and electromagnetic wave shielding effectiveness. The proposed soft PU foam composite planks consist of the top and bottom PU foam layers and an interlayer of carbon fiber woven fabric. Meanwhile, PU foam is incorporated with carbon staple fibers and an aluminized PET film for reinforcement requirements and electromagnetic wave shielding effectiveness, respectively. Based on the test results, the two-step foaming process can provide the PU foam composite planks with excellent buffer absorption, puncture resistance, and electromagnetic wave shielding effectiveness; therefore, the proposed composite planks contribute a novel structure composition to SMP, enabling it to be used as a protective composite. In addition, the composites contain conductive material and thus exhibit a greater diversity of functions.
Highlights
Owing to the development of technology, shape memory polymer is used as a smart material, demonstrating great application potential in major areas [1,2,3]
In the 3rd stage, after the APC composite plank is placed in a mold of 320 mm × 330 mm × 40 mm, a carbon fiber nonwoven fabric and a PU foam mixture are added in order
Buffer Absorption of PU Foam Composite Planks In order to buffer absorption, PU foam composite planks are impacted by an impact load of 9000 N for the falling weight impact test
Summary
Owing to the development of technology, shape memory polymer is used as a smart material, demonstrating great application potential in major areas [1,2,3]. The results indicated that the foaming models with a regular cell structure exhibited a greater compression resistance, while the presence of filler was pertinent to the final properties of the products [21]. The manufacturing process is simple, efficient, and fruitful, and allows the incorporation of carbon staple fibers and carbon fiber woven fabrics without jeopardizing the PU foam’s ability to take shape; it provides the composite planks with better impact resistance and durability than single-layered PU foam planks at the same mass. The proposed composite planks are mechanically robust and provide electromagnetic wave shielding, which qualify them for the EMSE use, required by aviation, aerospace, and portable electronic products, especially for use in extreme environments
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