Abstract Buckypapers (BPs) were generally laid up interleaved with polyethylene (PE) films to form BPs/PE composites after hot press. However, the mechanical properties of BPs/PE composites as-prepared were not good enough owing to poor impregnation and weak interfacial interactions between the matrix and carbon nanotube (CNT). In this paper, controlled microwave radiation treatment was applied on the BPs/PE composites. It is found that the microwave irradiation can effectively improve the tensile strength and stiffness of BPs/PE composites. Specifically, the tensile strength of BPs/PE composites increases from 20.9 MPa upto 34.1 MPa, 2.8 times that of pure PE, while the modulus increases from 880 MPa to 1778 MPa, 3.0 times that of pure PE. In addition, the structures (including fractured morphology, the interfacial composition between CNT and PE, structure of CNT and PE matrix, and crystallization) of BPs/PE nanocomposites with and without microwave irradiation were observed by SEM, FTIR, Raman, X-ray, and DSC, and then a mechanism of microwave irradiation to enhance the mechanical properties of BPs/PE composites was also proposed.

中文翻译：

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微波辐射增强巴克纸/聚乙烯复合材料的力学性能

摘要 Buckypapers (BPs) 通常与聚乙烯 (PE) 薄膜交织，热压后形成 BPs/PE 复合材料。然而，由于浸渍差和基体与碳纳米管 (CNT) 之间的界面相互作用弱，所制备的 BPs/PE 复合材料的机械性能不够好。在本文中，可控微波辐射处理应用于 BPs/PE 复合材料。结果表明，微波辐照可以有效提高BPs/PE复合材料的拉伸强度和刚度。具体而言，BPs/PE 复合材料的拉伸强度从 20.9 MPa 增加到 34.1 MPa，是纯 PE 的 2.8 倍，而模量从 880 MPa 增加到 1778 MPa，是纯 PE 的 3.0 倍。此外，结构（包括断裂形态、CNT 和 PE 之间的界面组成、