摘要: The preparation of lightweight materials with electromagnetic interference-shielding effect- iveness higher than 30dB is critical for most industrial and consumer applications. Compounding polymer resin with conductive filler can generate excellent electromagnetic interference-shielding effectiveness but usually leads to a high-sample density, while the foaming of polymer composite suffers from the significant-reduced electromagnetic inter- ference-shielding effectiveness. In this study, polyetherimide composite foams with loading of 10–80 phr (parts per hundred of resins) nickel particles were fabricated to meet the gap. The polyetherimide/nickel composite foams possessed uniform cell structure and low- sample density such as 0.86 g/cm3 at 70 phr nickel. The coupling effects of gravity settle- ment and cell-structure solidification led to the formation of gradient distribution of nickel particles across the foams. The formed novel structure facilitated the enhancement of multi-reflection and multi-scattering among nickel particles and cells. As a consequence, polyetherimide/nickel foam with 70 phr nickel (PEIN70) possessed a high-electromagnetic interference shielding effectiveness of 86.7–106.5 dB over a frequency range of 50–3000MHz. When the sample density was considered, the specific electromagnetic interference shielding effectiveness of PEIN70 foam was as high as 121.3 dB/(g/cm3) at 1 GHz, which was higher than the reported electromagnetic interference-shielding materials. The excellent electromagnetic interference-shielding properties, lightweight, well-defined resin proper- ties ensure polyetherimide/nickel composite foams useful in many advanced applications.
-
期刊:
JOURNAL OF CELLULAR PLASTICS
-
分类:
物理学
>>
普通物理:统计和量子力学,量子信息等
-
引用:
ChinaXiv:201705.00402
(或此版本
ChinaXiv:201705.00402V1)
DOI:10.12074/201705.00402V1
CSTR:32003.36.ChinaXiv.201705.00402.V1
- 推荐引用方式:
Zhai, WT [Zhai, Wentao][ 1 ],Chen, YJ [Chen, Yuejuan][ 1 ],Ling, JQ [Ling, Jianqiang][ 1 ],Wen, BY [Wen, Bianying][ 2 ],Kim, YW [Kim, Young-Wook][ 3 ].(2017).Fabrication of lightweight, flexible polyetherimide/nickel composite foam with electromagnetic interference shielding effectiveness reaching 103 dB.JOURNAL OF CELLULAR PLASTICS.[ChinaXiv:201705.00402]
(点此复制)