Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (10): 3211.doi: 10.7503/cjcu20210249

• Polymer Chemistry • Previous Articles     Next Articles

Preparation and Properties of Light-weight Flexible Polyimide Paper-based Electromagnetic Shielding Composites

ZHANG Ruqiang1, ZHANG Guoliang1, LONG Zhu1,2(), ZHANG Dan1,2, LI Zhiqiang3, WANG Shihua3, HU Ailin3   

  1. 1.Key Laboratory of Eco?Textiles,Ministry of Education,Jiangnan University,Wuxi 214122,China
    2.Laboratory of Paper Technology,Jiangnan University,Wuxi 214122,China
    3.Lianyungang Fiber New Materials Research Institute Co. ,Ltd. ,Lianyungang 222002,China
  • Received:2021-04-12 Online:2021-10-10 Published:2021-10-10
  • Contact: LONG Zhu E-mail:longzhu@jiangnan.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(31600478);the “555” Development Program of Lianyungang, China(2015?13)

Abstract:

Nickel/polypyrrole@polyimide fiber paper-based electromagnetic shielding composites(Ni/PPy@ PI-CP) with sandwich structure were prepared by means of polyimide fiber paper-based conductive framework via vapor deposition of polypyrrole(PPy) and palladium-free electroless plating on PI-CP. Its morphology, electrical conductivity, mechanical properties and electromagnetic shielding performance were characterized, and the effects of temperature, bending degree, and folding times on the electrical conductivity and electromagnetic shielding performance of Ni/PPy@PI-CP were investigated. The results show that the electromagnetic shielding performance of Ni/PPy@PI-CP-3 can reach more than 70 dB; Ni/PPy@PI-CP-3 exhibits excellent conductivity stability under bending deformation, and its conductivity loss can be ignored. Even after 200 times of repeated folding tests, the conductivity of Ni/PPy@PI-CP-3 remains around 92.4%. In addition, Ni/PPy@PI-CP-3 has the characteristics of light weight, easy processing, and has stable thermal properties, its electromagnetic shielding performance after 300 ℃ treatment is still maintained at more than 80%.

Key words: Flexibility, Polypyrrole, Conductivity, Electromagnetic shielding, Paper-based composites

CLC Number: 

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