Preparation and Electromagnetic Shielding Properties of Polypropylene/Carbon Nanotubes Composites with Segregated Structure

doi:10.11944/j.issn.1000-0518.2020.08.200083

Chinese Journal of Applied Chemistry ›› 2020, Vol. 37 ›› Issue (8): 904-911.DOI: 10.11944/j.issn.1000-0518.2020.08.200083

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Preparation and Electromagnetic Shielding Properties of Polypropylene/Carbon Nanotubes Composites with Segregated Structure

QIU Jian^a,b, JIANG Zhiwei^a, XING Haiping^a*, LI Minggang^a, LIU Jie^a, TANG Tao^a*

^aState Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of Applied Chemistry, Chinese Acdemy of Sciences,Changchun 130022,China;
^bUniversity of Chinese Academy of Sciences,Beijing 100039,China

Received:2020-03-20 Published:2020-08-01 Online:2020-08-07
Contact: TANG Tao, professor; Tel:0431-85262004; Fax:0431-85262827; E-mail:ttang@ciac.ac.cn; Research interests:polymerization, polymer nanocomposites and polymer foams; XING Haiping , associate professor; Tel:0431-85262683; Fax:0431-85262827; E-mail:hpxing@ciac.ac.cn; Research interests:modification of polymer and foam materials
Supported by:
National Natural Science Foundation of China(No.51573179, No.51991353), and the Plan of Science and Technology of Jilin Province(No.20170203006GX)

Abstract

Abstract: Constructing segregated structure in polypropylene (PP)/carbon nanotubes (CNTs) composites via co-extrusion coating-compression molding technique is an effective way to achieve high electromagnetic interference shielding with low percolation threshold. Among them, CNTs are randomly distributed inside PP matrix to form conductive composites, which is coated on the outer surface of pure PP to form a segregated structure. The results show that the PP/CNTs composites exhibit an excellent electromagnetic interference shielding effectiveness (EMI SE) of 25.6 dB at 5.6% (mass fraction) of CNTs, and high-performance electrical conductivity with a low percolation threshold of 0.28% (volume fraction) CNTs. Furthermore the PP/CNTs composites have excellent mechanical properties. In a word, the co-extrusion coating-compression molding technique is a facile and green method, which plays a role in developing high-performance electromagnetic shielding composites.

Key words: segregated structure, carbon nanotubes, polypropylenes, percolation threshold, electromagnetic interference

QIU Jian, JIANG Zhiwei, XING Haiping, LI Minggang, LIU Jie, TANG Tao. Preparation and Electromagnetic Shielding Properties of Polypropylene/Carbon Nanotubes Composites with Segregated Structure[J]. Chinese Journal of Applied Chemistry, 2020, 37(8): 904-911.

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Preparation and Electromagnetic Shielding Properties of Polypropylene/Carbon Nanotubes Composites with Segregated Structure

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