Steam-chest molding of polypropylene/carbon black composite foams as broadband EMI shields with high absorptivity
文献类型：期刊论文
| 作者 | Li, Yang; Lan, Xiaoqin; Wu, Fei; Liu, Jingjing; Huang, Pengke; Chong, Yunkai; Luo, Haibin; Shen, Bin; Zheng, Wenge |
| 刊名 | COMPOSITES COMMUNICATIONS
 |
| 出版日期 | 2020 |
| 卷号 | 22 |
| 关键词 | SUPERCRITICAL CARBON-DIOXIDE STRUCTURAL EVOLUTION DRIVEN HIGH-PERFORMANCE ELECTROMAGNETIC PROPERTIES ELECTRICAL-PROPERTIES MICROWAVE-ABSORPTION POLYMER FOAMS GRAPHENE FOAM NANOCOMPOSITES LIGHTWEIGHT |
| 英文摘要 | Polypropylene (PP) composite pellets with 5-30 wt% carbon black (CB) were blowed with subcritical CO2, and then employed as building blocks to assemble into large-sized PPCB foam broad with dimension of 60x30x10 cm(3) by steam-chest molding. The resultant PPCB foams showed a closed-cell structure with cell size in hundreds of micrometers, which endowed them with low densities of 0.034-0.117 g/cm(3). Due to the high CB content of 30 wt%, the foam exhibited a high conductivity of 1.3 S/m and an electromagnetic interference (EMI) shielding effectiveness (SE) of 20-31 dB over the broadband frequency range of 6-18 GHz, corresponding to similar to 99%-99.92% shielded electromagnetic energy. Further increasing the sample thickness from 4 to 6 cm led to much higher SE of 41 dB (similar to 99.992% shielded power) over 8-12 GHz. More importantly, all PPCB foams possess an absorption-dominant shielding mechanism, and for the foams containing 25-30 wt% CB, their absorption coefficients are as high as 0.80-0.97, indicating similar to 80%-97% absorbed power. The unique features, as well as the foaming technologies, make our lightweight PPCB foams very potential in the scale-up manufacture of advanced EMI shields. |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/22394]  |
| 专题 | 中国科学院宁波材料技术与工程研究所 2020专题_期刊论文 2021专题_期刊论文 |
| 作者单位 | 1.Li, Y (corresponding author), Huanghuai Univ, Coll Chem & Pharmaceut Engn, Zhumadian 463000, Henan, Peoples R China. 2.Shen, B (corresponding author), Chinese Acad Sci, Ningbo Key Lab Polymer Mat, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Li, Yang,Lan, Xiaoqin,Wu, Fei,et al. Steam-chest molding of polypropylene/carbon black composite foams as broadband EMI shields with high absorptivity[J]. COMPOSITES COMMUNICATIONS,2020,22. |
| APA | Li, Yang.,Lan, Xiaoqin.,Wu, Fei.,Liu, Jingjing.,Huang, Pengke.,...&Zheng, Wenge.(2020).Steam-chest molding of polypropylene/carbon black composite foams as broadband EMI shields with high absorptivity.COMPOSITES COMMUNICATIONS,22. |
| MLA | Li, Yang,et al."Steam-chest molding of polypropylene/carbon black composite foams as broadband EMI shields with high absorptivity".COMPOSITES COMMUNICATIONS 22(2020). |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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