Sathish Kumar M, Joseph Andrews, James Raju K C, Jayavel R
Crystal Growth Centre, Anna University, Chennai 600025, India.
Centre for Advanced Studies in Electronics Science and Technology (CASEST), School of Physics, Central University of Hyderabad, Telangana 500046, India.
J Colloid Interface Sci. 2025 Jan 15;678(Pt A):407-420. doi: 10.1016/j.jcis.2024.08.193. Epub 2024 Aug 29.
As technology advances, the demand for effective microwave-absorbing materials (MAM) to mitigate electromagnetic wave interference is growing. Two-dimensional (2D) materials are increasingly favored across various fields for their high specific surface area, electrical conductivity, low density, and dielectric loss properties. This study presents lightweight nanocomposites composed of graphene nanoplatelets blended with epoxy resin (ER) and cardanol with silane-functionalized (SFC) as a toughening agent. The resulting nanocomposites exhibit a high surface roughness of 130 nm and an enhanced hydrophobicity, as evidenced by a high contact angle. Notably, the ER/SFC/GNP sample at 3 wt% (0.075 g) achieves a minimum reflection loss value of -18 dB at a thickness of 10 mm, indicating improved impedance matching and enhanced dielectric loss capability. The increasing damping factor ratio to approximately 0.95 further augments the reflection loss performance. The research aims to develop cost-effective, efficient, lightweight graphene-based nanocomposite absorbers.
随着技术的进步，减轻电磁波干扰的有效微波吸收材料（MAM）的需求日益增长。二维（2D）材料因其高比表面积、导电性、低密度和介电损耗特性，在各个领域越来越受到青睐。本研究提出了由石墨烯纳米片与环氧树脂（ER）和硅烷功能化腰果酚（SFC）作为增韧剂混合而成的轻质纳米复合材料。所得纳米复合材料表现出130nm的高表面粗糙度和增强的疏水性，高接触角证明了这一点。值得注意的是，3wt%（0.075g）的ER/SFC/GNP样品在10mm厚度时实现了-18dB的最小反射损耗值，表明阻抗匹配得到改善，介电损耗能力增强。阻尼因子比增加到约0.95进一步提高了反射损耗性能。该研究旨在开发具有成本效益、高效、轻质的石墨烯基纳米复合吸收剂。
