Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (8): 2627.doi: 10.7503/cjcu20210161

• Polymer Chemistry • Previous Articles     Next Articles

Preparation of MWCNTs/PEEK Electromagnetic Shielding Composites with Sandwich Structure

WU Tonghua, YUE Xigui, MEI Xiaohan, LIANG Liubo, PENG Xin, MA Youmei, ZHANG Shuling()   

  1. Key Laboratory of High?performance Plastics,Ministry of Education,College of Chemistry,Jilin University,Changchun 130012,China
  • Received:2021-03-10 Online:2021-08-10 Published:2021-08-05
  • Contact: ZHANG Shuling E-mail:zsl@jlu.edu.cn
  • Supported by:
    the Jilin Province Industrial Technology Research and Development Project, China(2021C036?1)

Abstract:

The multi-walled carbon nanotubes/polyether ether ketone electromagnetic shielding composites with sandwich-structure were prepared by using polyether sulfone(PES) as binder, multi-walled carbon nanotubes(MWCNTs) as core-layer, and polyether ether ketone(PEEK) film as surface-layer. As a result, the average thickness of PEEK/3(1PES∶4MWCNTs)/PEEK composite was only 0.28 mm when an appropriate amount of binder PES was introduced into the core-layer and the number of core-layers was increased to three. And its density, tensile strength, 5% mass loss temperature(Td,5%), conductivity, electromagnetic shielding value and specific electromagnetic shielding value can reach 1.349 g/cm3, 80 MPa, 581.8 ℃, 2.6 S/cm, 32 dB and 115 dB/mm, respectively, indicating that the composite has light weight, thin thickness, good mechanical properties and high electromagnetic shielding performance. These excellent comprehensive performances can be attributed to the introduction of appropriate amount of PES into the MWCNTs core-layer as binder during the preparation of composite with sandwich-structure, which can enhance the interface between the carbon nanotubes in the core-layer and between the core-layer and the surface-layer, followed by the improvement in the mechanical properties of the composite. At the same time, the dense conductive network formed by the carbon nanotubes in the core-layer can endow the composite with high electromagnetic shielding performance.

Key words: Carbon nanotube, Polyether ether ketone, Polyether sulfone, Binder, Electromagnetic shielding property

CLC Number: 

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