Ahmad Ibrahim A, Koziol Krzysztof K K, Deveci Suleyman, Kim Hyun-Kyung, Kumar Ramachandran Vasant
Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Rd, Cambridge CB3 0FS, UK.
Enhanced Composites and Structures Centre, School of Aerospace, Transport and Manufacturing, Cranfield University, Cranfield MK43 0AL, UK.
Nanomaterials (Basel). 2018 Nov 17;8(11):947. doi: 10.3390/nano8110947.
The production of an innovative, high-performance graphene-based polymer nanocomposite using cost-effective techniques was pursued in this study. Well-dispersed and uniformly distributed graphene platelets within a polymer matrix, with strong interfacial bonding between the platelets and the matrix, provided an optimal nanocomposite system for industrial interest. This study reports on the reinforcement of high molecular weight multimodal-high-density polyethylene reinforced by a microwave-induced plasma graphene, using melt intercalation. The tailored process included designing a suitable screw configuration, paired with coordinating extruder conditions and blending techniques. This enabled the polymer to sufficiently degrade, predominantly through thermomechanical-degradation, as well as thermo-oxidative degradation, which subsequently created a suitable medium for the graphene sheets to disperse readily and distribute evenly within the polymer matrix. Different microscopy techniques were employed to prove the effectiveness. This was then qualitatively assessed by Raman spectroscopy, X-ray diffraction, rheology, mechanical testing, density measurements, thermal expansion, and thermogravimetric analysis, confirming both the originality as well as the effectiveness of the process.
本研究致力于采用经济高效的技术制备一种创新的、高性能的基于石墨烯的聚合物纳米复合材料。聚合物基体中分散良好且均匀分布的石墨烯片层，以及片层与基体之间牢固的界面结合，为工业应用提供了一种理想的纳米复合材料体系。本研究报道了利用微波诱导等离子体石墨烯通过熔体插层法增强高分子量多峰高密度聚乙烯的情况。定制的工艺包括设计合适的螺杆配置，并配合协调挤出机条件和共混技术。这使得聚合物能够充分降解，主要通过热机械降解以及热氧化降解，随后为石墨烯片层在聚合物基体中易于分散和均匀分布创造了合适的介质。采用了不同的显微镜技术来证明其有效性。然后通过拉曼光谱、X射线衍射、流变学、力学测试、密度测量、热膨胀和热重分析进行定性评估，证实了该工艺的创新性和有效性。
