Huang Furong, Wang Yimeng, Wang Peiyu, Ma Hui-Ling, Chen Xibang, Cao Ke, Pei Yongmao, Peng Jing, Li Jiuqiang, Zhai Maolin
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
State Key Laboratory for Turbulence and Complex Systems, College of Engineering, Peking University Beijing 100871 China.
RSC Adv. 2018 Jul 4;8(43):24236-24242. doi: 10.1039/c8ra03314e. eCollection 2018 Jul 2.
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 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.
通过溶液浇铸，随后进行发泡和交联反应，将氧化多壁碳纳米管（o-MWCNTs）引入有机硅泡沫中，以制备具有高伽马辐射稳定性的电磁干扰（EMI）屏蔽材料。所制备的o-MWCNT/有机硅泡沫复合材料表现出优异的机械强度和有效的EMI屏蔽性能，在K波段中，当o-MWCNTs含量为30 wt%且厚度为0.5 - 6.4 mm时，具有26至73 dB的优异EMI屏蔽效能（SE）。此外，该复合材料具有良好的伽马辐射稳定性，在吸收剂量为500 kGy的伽马辐照后，表现出相对稳定的EMI屏蔽性能，并且硬度和耐压性有所提高。这些结果表明，o-MWCNT/有机硅泡沫复合材料是在某些电离辐射环境中进行EMI屏蔽的有吸引力的候选材料。
