用于微波屏蔽的含FeO修饰石墨纳米颗粒的隔离导电聚合物复合材料

Segregated Conductive Polymer Composite with FeO-Decorated Graphite Nanoparticles for Microwave Shielding.

作者信息

Matzui Ludmila Yu, Syvolozhskyi Oleksii A, Vovchenko Ludmila L, Yakovenko Olena S, Len Tetyana A, Ischenko Olena V, Vakaliuk Anna V, Oliynyk Victor V, Zagorodnii Volodymyr V, Naumenko Antonina, Cojocari Maria, Fedorov Georgy, Kuzhir Polina

机构信息

Facultiy of Physics, Taras Shevchenko National University of Kyiv, Volodymyrska Str. 64/13, 01601 Kyiv, Ukraine.

Facultiy of Chemistry, Taras Shevchenko National University of Kyiv, Volodymyrska Str. 64/13, 01601 Kyiv, Ukraine.

出版信息

Materials (Basel). 2024 Jun 8;17(12):2808. doi: 10.3390/ma17122808.

DOI:10.3390/ma17122808

PMID:38930178

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11204437/

Abstract

Graphite nanoplatelets (GNPs)-the segregated ultra-high molecular weight polyethylene (UHMWPE)-based composites with hybrid filler-decorated with FeO were developed. Using X-ray diffraction and scanning electron microscopy, it was shown that the decorated component has the shape of separate granules, or their clusters were distributed evenly over the GNPs surface. The individual FeO nanoparticles are predominantly rounded, with diameters of approximately 20-60 nm. The use of GNPs/FeO as a filler leads to significant decreases in the percolation limit φc, 0.97 vol% vs. 0.56 vol% for GNPs/UHMWPE- and (GNPs/FeO)/UHMWPE segregated composite material (SCM), respectively. Modification of the GNP surface with FeO leads to an essential improvement in the electromagnetic interference shielding due to enhanced microwave absorption in the 26-37 GHz frequency range in its turn by abundant surface functional groups and lattice defects of GNPs/FeO nanoparticles.

摘要

开发了基于石墨纳米片（GNPs）的、用FeO修饰的混合填料隔离超高分子量聚乙烯（UHMWPE）复合材料。通过X射线衍射和扫描电子显微镜表明，修饰后的组分呈单独颗粒状，或其聚集体均匀分布在GNPs表面。单个FeO纳米颗粒主要呈圆形，直径约为20 - 60 nm。使用GNPs/FeO作为填料会导致渗流极限φc显著降低，对于GNPs/UHMWPE和（GNPs/FeO）/UHMWPE隔离复合材料（SCM），渗流极限分别为0.97 vol%和0.56 vol%。用FeO对GNP表面进行改性，由于GNPs/FeO纳米颗粒丰富的表面官能团和晶格缺陷，使得其在26 - 37 GHz频率范围内的微波吸收增强，进而显著改善了电磁干扰屏蔽性能。