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Start Over Author "Liu, Mingfang" Journal journal of polymer research
3 results on '"Liu, Mingfang"'

2. Influence of MWCNTs and nano-Fe3O4 on the properties and structure of MWCNTs/ Fe3O4/PLA composite film with electromagnetic interference shielding function

Author

Yifan Jing, Yao Zhang, Fu Li, Huimin Li, Man Zhang, Peng Wang, Bowen Wang, Liu Mingfang, Yong Yang, Jie Wu, Gaihong Wu, Kaiwen Wang, Jie Zhang, Shuqiang Liu, and Ya-Ru Yang

Subjects
Materials science, Polymers and Plastics, Organic Chemistry, Composite number, 02 engineering and technology, Carbon nanotube, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Electromagnetic radiation, 0104 chemical sciences, law.invention, chemistry.chemical_compound, Crystallinity, Polylactic acid, chemistry, law, EMI, Nano, Materials Chemistry, Crystallization, Composite material, 0210 nano-technology
Abstract

A large number of electronic devices could generate a lot of electromagnetic waves, which could interfere with other equipment and harm the human body. Therefore, an electromagnetic interference shielding (EMI) material is urgently needed to protect the human body and the electronic equipment. In this paper, the multi-wall carbon nanotubes (MWCNTs) and the nano-Fe3O4 were added into the polylactic acid (PLA) matrix to form the composite film with electromagnetic interference shielding performance. And the structure and properties of MWCNTs/Fe3O4/PLA composite films, such as the morphology, chemical structure, crystallization, mechanical property, conductive property, magnetic property and electromagnetic interference shielding property, were researched. The result shows that too much Fe3O4 could lead to agglomeration, and the coupling agent KH570 had grafted and modified the surface of MWCNTs. The MWCNTs and nano-Fe3O4 could increase the crystallinity of PLA matrix. With the increase of MWCNTs, the maximum tensile stress of composite films gradually increased, and the maximum tensile strain decreased, and the resistance value showed a significant downward trend. The Fe3O4 could improve the magnetic properties of composite film. The MWCNTs and Fe3O4 could improve the electromagnetic interference shielding efficiency (EMI SE). The MWCNTs played a more significant role than the Fe3O4 in the process of EMI, and the EMI SE of the composite film with 3:1 ratios of MWCNTs/Fe3O4 could rise to 22 dB.

Published
2020

3. Influence of MWCNTs and nano-Fe3O4 on the properties and structure of MWCNTs/ Fe3O4/PLA composite film with electromagnetic interference shielding function.

Author

Liu, Shuqiang, Wang, Peng, Yang, Yaru, Yang, Yong, Wu, Gaihong, Li, Huimin, Wang, Kaiwen, Wang, Bowen, Liu, Mingfang, Zhang, Yao, Wu, Jie, Zhang, Jie, Jing, Yifan, Li, Fu, and Zhang, Man

Subjects
ELECTROMAGNETIC shielding, ELECTROMAGNETIC interference, POLYLACTIC acid, ELECTRONIC equipment, CARBON nanotubes, ELECTROMAGNETIC waves, HUMAN body
Abstract

A large number of electronic devices could generate a lot of electromagnetic waves, which could interfere with other equipment and harm the human body. Therefore, an electromagnetic interference shielding (EMI) material is urgently needed to protect the human body and the electronic equipment. In this paper, the multi-wall carbon nanotubes (MWCNTs) and the nano-Fe3O4 were added into the polylactic acid (PLA) matrix to form the composite film with electromagnetic interference shielding performance. And the structure and properties of MWCNTs/Fe3O4/PLA composite films, such as the morphology, chemical structure, crystallization, mechanical property, conductive property, magnetic property and electromagnetic interference shielding property, were researched. The result shows that too much Fe3O4 could lead to agglomeration, and the coupling agent KH570 had grafted and modified the surface of MWCNTs. The MWCNTs and nano-Fe3O4 could increase the crystallinity of PLA matrix. With the increase of MWCNTs, the maximum tensile stress of composite films gradually increased, and the maximum tensile strain decreased, and the resistance value showed a significant downward trend. The Fe3O4 could improve the magnetic properties of composite film. The MWCNTs and Fe3O4 could improve the electromagnetic interference shielding efficiency (EMI SE). The MWCNTs played a more significant role than the Fe3O4 in the process of EMI, and the EMI SE of the composite film with 3:1 ratios of MWCNTs/Fe3O4 could rise to 22 dB. [ABSTRACT FROM AUTHOR]

Published
2020
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