Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 140, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2020.106188
Keywords
Polymer-matrix composites (PMCs); Electrical properties; Interface/interphase; Compression moulding
Funding
- Natural Science Foundation Project of Chongqing [cstc2020jcyj-msxm0541]
- Fundamental Research Funds for the Central Universities [XDJK2020D020, XDJK2019B071]
- Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing [20191001]
- Chongqing primary and secondary school innovative talents training project plan, China [CY200217]
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Elastomer composites with temperature and strain-induced tunable EMI shielding effectiveness were successfully obtained by introducing temperature-sensitive microspheres (TSM) into PDMS/CNT mixture. The mechanism of temperature and strain-induced regulation on EMI shielding was investigated, showing that TSM particles could rearrange the CNT conductive network at specific temperature and strain levels. Temperature-induced regulation led to a decrease in EMI SE at 120°C, partially recovering at 150°C, while strain-induced regulation resulted in reduced EMI SE after 70% compression, partially recovering at 120°C.
Herein, the elastomer composites with temperature and strain-induced tunable electromagnetic interference (EMI) shielding effectiveness (SE) were successfully obtained by introducing temperature-sensitive microspheres (TSM) into the mixture of polydimethylsiloxane/multi-walled carbon nanotube (PDMS/CNT). The EMI shielding performance of the composites under different temperature and compression strain was evaluated carefully to investigate the mechanism of temperature and strain-induced regulation on EMI shielding. The TSM particles in the PDMS/TSM/CNT composites could be easily adjusted by specific temperature and strain, which resulted in the rearrangement of CNT conductive network and exhibited different electrical conductivity and EMI shielding performance. For temperature-induced regulation, the EMI SE of the composites decreased after being treated at 120 degrees C and then partly recovered at 150 degrees C. For strain-induced regulation, the EMI SE of the composites was reduced after being compressed 70%. Furthermore, the strain-induced reduction of the composites could partly recover once heating at 120 degrees C again.
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