Oxidized multiwall carbon nanotube/silicone foam composites with effective electromagnetic interference shielding and high gamma radiation stability

Furong Huang; Yimeng Wang; Peiyu Wang; Hui-Ling Ma; Xibang Chen; Ke Cao; Yongmao Pei; Jing Peng; Jiuqiang Li; Maolin Zhai

doi:10.1039/c8ra03314e

Oxidized multiwall carbon nanotube/silicone foam composites with effective electromagnetic interference shielding and high gamma radiation stability

RSC Adv. 2018 Jul 4;8(43):24236-24242. doi: 10.1039/c8ra03314e. eCollection 2018 Jul 2.

Authors

Affiliations

¹ Beijing National Laboratory for Molecular Sciences, Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science, The Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education, College of Chemistry and Molecular Engineering, Peking University Beijing 100871 China mlzhai@pku.edu.cn.
² State Key Laboratory for Turbulence and Complex Systems, College of Engineering, Peking University Beijing 100871 China.
³ Beijing Key Laboratory of Radiation Advanced Materials, Beijing Research Center for Radiation Application Beijing 100015 China.

Abstract

Oxidized multiwall carbon nanotubes (o-MWCNTs) were introduced into silicone foam to fabricate an electromagnetic interference (EMI) shielding material with high gamma radiation stability by solution casting followed by foaming and cross-linking reactions. The as-prepared o-MWCNT/silicone foam composites exhibited excellent mechanical strength and effective EMI shielding properties with superior EMI shielding effectiveness (SE) ranging from 26 to 73 dB at a 0.5-6.4 mm thickness with 30 wt% o-MWCNTs in the K_u band. Moreover, the composites have good gamma radiation stability, showing relatively stable EMI shielding properties and an improvement of hardness and pressure resistance after gamma irradiation with the absorbed dose of 500 kGy. These results indicate that the o-MWCNT/silicone foam composite is an attractive candidate for EMI shielding in some ionizing radiation environments.