An environmentally friendly strategy for preparing polydimethylsiloxane/multiwalled carbon nanotube composites with multilayer structures

This work showcases the production of flexible polydimethylsiloxane/multiwalled carbon nanotube (PDMS/MWCNT) composites with multilayer structures via the glucose template method followed by vacuum-assisted filtration and hot pressing. The properties of the single-layer and multilayer composites have been systematically investigated. In the X-band, thanks to the ohmic loss, the interfacial polarization loss at the interfaces and the multiple reflections between PDMS/MWCNT layers, the 5-layer PDMS/MWCNT composites achieves 65.9 dB. Furthermore, all multilayer PDMS/MWCNT composites present a high retention rate of about of 90% after repeated bending with curvature radius of 1.8 mm at a frequency of 1 cycle per 2 s for 1000 times.HighlightsThe PDMS/MWCNT composites are fabricated by the glucose template method.The 5-layer PDMS/MWCNT composites can reach 65.9 dB in X-band.The PDMS/MWCNT composites present high stability even after repeated bending. The mutilayer PDMS / MWCNT composites can reach great EMI SE.image