Baikousi Maria, Gioti Christina, Vasilopoulos Konstantinos C, Drymiskianaki Argyri, Papadakis Vassilis M, Viskadourakis Zacharias, Ntaflos Angelos, Moschovas Dimitrios, Paipetis Alkiviadis S, Kenanakis George, Karakassides Michael A
Department of Materials Science and Engineering, University of Ioannina, GR-45110 Ioannina, Greece.
Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, N. Plastira 100, Vasilika Vouton, GR-70013 Heraklion, Greece.
Molecules. 2024 Sep 13;29(18):4363. doi: 10.3390/molecules29184363.
Developing materials for efficient energy storage and effective electromagnetic interference (EMI) shielding is crucial in modern technology. This study explores the synthesis and characterization of carbonaceous shape-stabilized octadecane/MWCNT (multi-walled carbon nanotube) composites, utilizing activated carbon, expanded graphite or ceramic carbon foam, as shape stabilizers for phase change materials (PCMs) to enhance thermal energy storage and EMI shielding, for energy-efficient and advanced applications. The integration of octadecane, a phase change material (PCM) with carbonaceous stabilizers ensures the material's stability during phase transitions, while MWCNTs contribute to improved thermal storage properties and EMI shielding capabilities. The research aims to develop novel composites with dual functionality for thermal storage and EMI shielding, emphasizing the role of carbon matrices and their MWCNT composites. SEM and CT microtomography analyses reveal variations in MWCNT incorporation across the matrices, influenced by surface properties and porosity. Leaching tests, infrared spectroscopy (FT-IR) and differential scanning calorimetry (DSC) confirm the composite's stability and high latent heat storage. The presence of nanotubes enhances the thermal properties of octadecane and ΔH values almost reached their theoretical values. EMI shielding effectiveness measurements indicate that the composites show improved electric properties in the presence of MWCNTs.
开发用于高效储能和有效电磁干扰（EMI）屏蔽的材料在现代技术中至关重要。本研究探索了含碳形状稳定的十八烷/多壁碳纳米管（MWCNT）复合材料的合成与表征，利用活性炭、膨胀石墨或陶瓷碳泡沫作为相变材料（PCM）的形状稳定剂，以增强热能存储和EMI屏蔽性能，用于节能和先进应用。十八烷（一种相变材料）与含碳稳定剂的结合确保了材料在相变过程中的稳定性，而多壁碳纳米管有助于改善热存储性能和EMI屏蔽能力。该研究旨在开发具有热存储和EMI屏蔽双重功能的新型复合材料，强调碳基质及其多壁碳纳米管复合材料的作用。扫描电子显微镜（SEM）和计算机断层扫描（CT）显微分析揭示了多壁碳纳米管在不同基质中的掺入差异，这受到表面性质和孔隙率的影响。浸出试验、红外光谱（FT-IR）和差示扫描量热法（DSC）证实了复合材料的稳定性和高潜热存储能力。纳米管的存在增强了十八烷的热性能，其焓变值几乎达到了理论值。EMI屏蔽效能测量表明，在存在多壁碳纳米管的情况下，复合材料的电学性能得到了改善。
