Improvement of platinum nanoparticles-immobilized a-zirconium phosphate sheets on tracking and erosion resistance of silicone rubber

摘要

Novel platinum nanoparticles immobilized on exfoliated a-zirconium phosphate (Pt@ZrP-E) was prepared and the structure of Pt@ZrP-E was characterized by SEM, TEM and XRD. The effect of Pt@ZrP-E on anti-tracking and erosion properties of Pt@ZrP-E/SiR was investigated. It was found that Pt@ZrP-E can be uniformly dispersed in SiR and SiR containing 0.3 ph Pt@ZrP-E could pass 1A 4.5 kV level. TG results showed that the residues of Pt@ZrP-E/SiR with 0.3 ph Pt@ZrP-E at 700 degrees C increased from 43.4 wt% to 54.0 wt% compared to SiR. According to the thermogravimetry-Fourier transform infrared spectroscopy (TG-FTIR) results, the release of carbonyl compounds of Pt@ZrP-E/SiR was decreased but that of CH4 was significantly increased, indicating that Pt@ZrP-E was capable of inhibiting the oxidation of methyl groups and facilitate the cross-linking of SiR under high temperature, which results in the formation of a protective ceramic layer, reduce the ablation from electrical arcing and improve the anti-tracking and erosion properties of SiR.