## 3 Results and Discussion  
Figure 1 shows the SEM images of the fractured surfaces of SR/POE/CB-IL and SR/POE/CB-CNT-IL composites. The samples were first fractured in liquid nitrogen, and then the fractured surfaces were immersed into n-hexane at 90 \({}^{\circ}\)C for 12 h to remove the POE phase. All samples display typical co-continuous structures, and the collapsed surface morphology is attributed to the dissolution of the POE phase. Carbon fillers modified by ILs were premixed with SR and then mixed with POE. Most fillers were initially dispersed in the SR matrix because the localization of fillers is controlled by flow properties and dynamic factors. When CNTs were added, the viscosity of the SR phase increased \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline
**Sample** & **SR** & **POE** & **CB** & **MWCNTs** & **ILs** & **EVA** & **DBPH** \\ \hline SR/POE & 60 & 40 & - & - & - & 5 & 2 \\ SR/POE/5 CB-IL & 60 & 40 & 5 & - & 1 & 5 & 2 \\ SR/POE/10 CB-IL & 60 & 40 & 10 & - & 2 & 5 & 2 \\ SR/POE/15 CB-IL & 60 & 40 & 15 & - & 3 & 5 & 2 \\ SR/POE/20 CB & 60 & 40 & 20 & - & - & 5 & 2 \\ SR/POE/20 CB-IL & 60 & 40 & 20 & - & 4 & 5 & 2 \\ SR/POE/15 CB-CNT-IL & 60 & 40 & 10 & 5 & 3 & 5 & 2 \\ SR/POE/20 CB-CNT & 60 & 40 & 15 & 5 & - & 5 & 2 \\ SR/POE/20 CB-CNT-IL & 60 & 40 & 15 & 5 & 4 & 5 & 2 \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Composite compositions (weight ratio). significantly, and the volume fraction of the SR phase decreased significantly due to the large length and high surface area of CNTs. This caused the SR/POE/CB-CNT-IL composites to form regular and orderly co-continuous phase structures [16]. Figure 2 shows the FESEM images of the fracture surfaces of the SR/POE/CB-IL, SR/POE/CB, SR/POE/CB-CNT-IL and SR/POE/CB-CNT composites. When the ILs were added, the dispersion of carbon filler was improved significantly because the cation-\(\pi\) interactions between ILs and carbon fillers promoted the further dispersion of fillers and reduced agglomeration. In addition, when the CNTs were added, the cation-\(\pi\) interactions between ILs and CNTs were stronger than those between ILs and CBs due to the large length and high surface area of CNTs [17]. Figure 1: Scanning electron microscopy (SEM) images of the fracture surfaces of the silicone rubber/polyolefin elastomer/carbon black -ionic liquid (SR/POE/CB-IL) and silicone rubber/polyolefin elastomer/carbon black-carbon nanotube-ionic liquid (SR/POE/CB-CNT-IL) composites. Figure 2: Field-emission scanning electron microscopy (FESEM) images of the fracture surfaces of the SR/POE/CB-IL, SR/POE/CB, SR/POE/CB-CNT-IL, and SR/POE/CB-CNT composites. As the CB-IL content increased, the electrical conductivity of the SR/POE/15 CB-IL and SR/POE/20 CB-IL composites was \(3.6\times 10^{-1}\) and \(8.9\times 10^{-1}\) S/m, respectively. For the SR/POE/CB-CNT-IL composites, as the CB-CNT-IL content increased, the conductivity of the SR/POE/15 CB-CNT-IL and SR/POE/20 CB-CNT-IL composites was \(6.7\times 10^{-1}\) and \(3.5\) S/m, respectively. CB-CNT-IL can regulate and control the aggregation, dispersion and uniformity of carbon fillers to form three-dimensional conductive networks. This improves the electrical conductivity, and the EMI SE values increased as the amount of fillers in the composites increased. Figure 3a shows the EMI shielding effectiveness (SE) of the composites in the frequency range of 8.0 to 12.0 GHz. SR/POE/CB-CNT-IL composites have higher EMI SE values than the SR/POE/CB-IL composites at identical filler loadings [18]. The CNTs with larger aspect ratios helped form a more conductive network and improved the EMI performance of the SR/POE/CB-CNT-IL composites. Specifically, the shielding effectiveness of the SR/POE/20 CB-IL and SR/POE/20 CB-CNT-IL composites was 29.4 dB and 36.5 dB, over the frequency range of 8.0 to 12.0 GHz, respectively. This gives the SR/POE/20 CB-CNT-IL composite a novel potential electromagnetic interference that shields materials by eliminating electromagnetic pollution over a wide frequency range.