期刊
MATERIALS & DESIGN
卷 95, 期 -, 页码 119-126出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2016.01.086
关键词
Poly lactide; Graphene nanoplatelet; Electromagnetic interference shielding; Nanocomposite
Biodegradable poly lactide (PLA)/graphene nanoplatelet (GNP) nanocomposites with 0-15 wt% (0-9.1 vol%) of nanofiller were prepared. Scanning electron micrographs showed good dispersion of GNPs in PLA at low concentrations while above 6 wt%, GNPs were found to become physically in contact forming a 3D network within the matrix. X-ray diffraction showed that GNPs had a significant effect on the semi-crystalline structure of PLA which was also confirmed by differential scanning calorimetry measurements. Electromagnetic properties and electromagnetic interference shielding effectiveness of the nanocomposites were determined over C-and X-bands (5.85-12.4 GHz). It was observed that GNP embedding in PLA did not alter its magnetic permeability but enhanced its electrical permittivity and conductivity markedly leading to higher shielding effectiveness. The contributions of reflection and absorption to the overall shielding performance of the nanocomposites were determined and reflection was found to be the dominant shielding mechanism. However, the absorption potential of the samples increased by increasing GNP loading with the effective absorbance being more than 80% for a 1.5 mm-thick sample containing 15 wt% of GNPs compared to less than 0.6% for pristine PLA. (C) 2016 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据