Sandwich structured iPP/CNTs nanocomposite foams with high electromagnetic interference shielding performance

被引：41
作者：
Fu, Long [1 ]
Li, Kun [1 ]
Qin, Hua [2 ]
Hou, Junji [1 ]
Zhang, Xiaoli [1 ]
He, Guangjian [3 ]
Liu, Baochen [1 ]
Ren, Chenxing [1 ]
Chen, Jingbo [1 ]
机构：
[1] Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450001, Peoples R China
[2] Zhengzhou Rd & Bridge Construct Investment Grp Co, Zhengzhou 450001, Peoples R China
[3] South China Univ Technol, Guangdong Prov Key Lab Tech & Equipment Macromol, Guangzhou 510006, Peoples R China
来源：
COMPOSITES SCIENCE AND TECHNOLOGY | 2022年 / 220卷
关键词：
Polymer-matrix composites (PMCs); Carbon nanotubes; Sandwich material; Foam; Electromagnetic interference shielding (EMI); SEGREGATED CONDUCTIVE NETWORKS; COMPOSITE FOAMS; ULTRALOW-THRESHOLD; NUCLEATING-AGENT; LIGHTWEIGHT; CARBON; EFFICIENT; FACILE; GRADIENT; FILMS;
D O I：
10.1016/j.compscitech.2022.109297
中图分类号：
TB33 [复合材料];
学科分类号：
摘要：
Polymer-based nanocomposite foams with high electrical conductivity are promising alternatives to traditional metal materials in the field of electromagnetic interference (EMI) shielding due to their advanced properties. Herein we prepared nanocomposite foams based on isotactic polypropylene (iPP) and carbon nanotubes (CNTs), using a facile melt blending process combining with an environment friendly physical foaming method. A foamed iPP/CNTs nanocomposites sandwich structure is obtained by utilizing the varied viscoelastic properties of the iPP/CNTs blends with different CNTs contents, under a given foaming temperature schedule. The manufactured sandwich structure possesses a micro-foamed core layer (low CNTs content) and nano-foamed skin layers (high CNTs content), which can provide a synergistic effect on the EMI shielding performance. A total electromagnetic shielding effectiveness of 38.0 dB for the foamed iPP-10CNTs/iPP-3CNTs/iPP-10CNTs was achieved, of which 84.5% was found to be attributed to the absorption mechanism, leading to a superior EMI shielding performance, with respect to either the single layered microcellular foams or their solid counterparts.
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页数：10
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