# Preparation Methods and Properties of CNT/CF/G Carbon-Based Nano-Conductive Silicone Rubber
## 3 Results and Discussion
### Properties of Blended Carbon Nano-Conductive Silicone Rubber
Figure 17: Raman spectra of the LSR/CNT/CF/G. Figure 18: Comparative analysis of the Raman spectra of the blended and single-filler conductive silicone rubber. Figure 19: Thermogravimetric analysis of LSR/CNT/CF/G. Figures 20 and 21 show that the thermal stability of the carbon-based nano-conductive silicone rubbers is obviously higher than that of pure LSR. In T\({}_{\rm d.5\%}\) decomposition, the decomposition temperature of pure LSR, LSR/CNT/CF/G, LSR/CNT, LSR/CF, and LSR/G was 441 \({}^{\circ}\)C, 464 \({}^{\circ}\)C, 457 \({}^{\circ}\)C, and 470 \({}^{\circ}\)C, respectively. Compared to the other carbon-based nano-filler conductive silicone rubber, the thermal stability of LSR/CNT was the best, and the thermal stability of LSR/CNT/CF/G was similar to that of LSR/CNT. As shown in Figure 21, the initial decomposition temperature of pure LSR was 360 \({}^{\circ}\)C, while that of LSR/CNT/CF/G was about 400 \({}^{\circ}\)C. This is because the conductive fillers graphene, CNTs, and CFs all exhibit good thermal stability and thermal conductivity; thus, the carbon-based nano-conductive silicone rubber compounded by them has a higher initial decomposition temperature than pure LSR. When the mass loss was 10%, the temperature of pure LSR was 520 \({}^{\circ}\)C and of LSR/CNT/CF/G was 526 \({}^{\circ}\)C. This shows that the heat resistance of LSR improved due to the combination of the various fillers. LSR/CNT/CF/G has good heat resistance and can be used as a varistor sensor. is lower than the Tg value, the material is brittle, and when the material temperature is higher than the Tg value [28], the material is highly elastic. Figure 22 displays the Tg of LSR/CNT/CF/G obtained using DSC, and Figure 23 compares it with that of the other four silicone rubbers. As shown in Figure 22, the Tg of LSR/CNT/CF/G with 14.7 wt% conductive filler was \(-\)51.126 \({}^{\circ}\)C.  
As shown in Figure 23, the Tg of pure LSR, LSR/CNT/CF/G, LSR/CNT, LSR/G, and LSR/CF were \(-\)49 \({}^{\circ}\)C, \(-\)51.126 \({}^{\circ}\)C, \(-\)51.479 \({}^{\circ}\)C, \(-\)49.944 \({}^{\circ}\)C, \(-\)50.97 \({}^{\circ}\)C, and \(-\)50.72 \({}^{\circ}\)C, respectively. The Tg values were similar; all were around \(-\)50 \({}^{\circ}\)C. This is because silicone rubber accounts for a large mass fraction, and its cold resistance determines the Tg value. The working temperature of \(-\)50 \({}^{\circ}\)C meets the working environment of most varistors. (5) Crystal structure analysis of the LSR/CNT/CF/G. Figure 24 presents the XRD analysis of LSR/CNT/CF/G, and Figure 25 presents the XRD comparison analysis chart of the five kinds of silicone rubber. As shown in Figure 24, pure LSR exhibited two broad peaks in the center range of 20 = 10\({}^{\circ}\) and 22.5\({}^{\circ}\), which proves that the LSR polymer has an amorphous structure, and two broad peaks were also observed for LSR/CNT/CF/G in the center range of 20 = 10\({}^{\circ}\) and 22.5\({}^{\circ}\). Figure 25 shows that for  
Figure 23: DSC comparative analysis diagram of the blended and single-filler conductive silicone rubbers. Figure 12:0 DSC analysis of LSR/CNT/CF/G. LSR/CNT/CF/G, other than the above two characteristic peaks, the characteristic peak at 20 = 24\({}^{\circ}\) was absent and that at 20 = 28.2\({}^{\circ}\) was obviously diminished. This proves that due to the interaction of the conductive fillers, the fillers are uniformly dispersed during the ultrasonic dispersion and have strong interfacial force and the fillers are dispersed when the LSR solution is cured. The heat resistance, cold resistance, Raman spectra, and tensile sensitivity of the conductive silicone rubbers blended with multiple fillers and single filler were assessed.