TY - JOUR
T1 - Porous network carbon nanotubes/chitosan 3D printed composites based on ball milling for electromagnetic shielding
AU - Pei, Xiaoyuan
AU - Zhao, Mingyue
AU - Li, Ruixin
AU - Lu, Hao
AU - Yu, Rongrong
AU - Xu, Zhiwei
AU - Li, Diansen
AU - Tang, Youhong
AU - Xing, Wenjin
N1 - Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/6
Y1 - 2021/6
N2 - Carbon nanotubes (CNTs) are easy to agglomerate, which results in poor structure reproducibility, and seriously restricts the improvement of conductivity and electromagnetic interference (EMI) shielding properties of CNTs composites. In this study, CNTs were evenly dispersed in the chitosan (CS) matrix by a high energy mechanical ball milling method, and three-dimensional (3D) printing ink of CNTs/CS was obtained. The CNTs/CS composites with porous network structures are prepared by the 3D printing technology. The results show that the 3D porous network CNTs/CS composites can effectively absorb electromagnetic waves. The 3D printed CNTs/CS composites with porous networks show an exceptional EMI shielding effectiveness of 25.07 dB at a low density of 72 mg/cm3. According to the square hole grid structure of 3D printed products, the influence of pore size and conductivity of the composites on the EMI shielding performance is simulated and analyzed, which are consistent with the experimental results. For non-magnetic materials, conductivity has a greater influence on the EMI shielding performance than that of pore size. This study provides a new idea and method for the rapid and accurate preparation of polymer matrix composites with excellent EMI shielding properties as surface of electronic components.
AB - Carbon nanotubes (CNTs) are easy to agglomerate, which results in poor structure reproducibility, and seriously restricts the improvement of conductivity and electromagnetic interference (EMI) shielding properties of CNTs composites. In this study, CNTs were evenly dispersed in the chitosan (CS) matrix by a high energy mechanical ball milling method, and three-dimensional (3D) printing ink of CNTs/CS was obtained. The CNTs/CS composites with porous network structures are prepared by the 3D printing technology. The results show that the 3D porous network CNTs/CS composites can effectively absorb electromagnetic waves. The 3D printed CNTs/CS composites with porous networks show an exceptional EMI shielding effectiveness of 25.07 dB at a low density of 72 mg/cm3. According to the square hole grid structure of 3D printed products, the influence of pore size and conductivity of the composites on the EMI shielding performance is simulated and analyzed, which are consistent with the experimental results. For non-magnetic materials, conductivity has a greater influence on the EMI shielding performance than that of pore size. This study provides a new idea and method for the rapid and accurate preparation of polymer matrix composites with excellent EMI shielding properties as surface of electronic components.
KW - A. Polymer-matrix composites (PMCs)
KW - B. EMI shielding
KW - B. Electrical properties
KW - E. 3-D Printing
UR - https://www.scopus.com/pages/publications/85102481090
U2 - 10.1016/j.compositesa.2021.106363
DO - 10.1016/j.compositesa.2021.106363
M3 - 文章
AN - SCOPUS:85102481090
SN - 1359-835X
VL - 145
JO - Composites Part A: Applied Science and Manufacturing
JF - Composites Part A: Applied Science and Manufacturing
M1 - 106363
ER -