Effect of atomizing spray pressure on performance of graphene oxide-SiO₂/ natural rubber composite

The graphene oxide(GO)-SiO₂/natural rubber composite was prepared by a self-developed spray sputtering drying method. Based on the principle of sputter blasting of the liquid column at high pressure against the metal wall with high temperature, achieved the secondary dispersion of droplets and the instantaneous removal of moisture and keeping the high dispersion state of GO-SiO₂ fillers in the natural latex. The effect of the spray pressure on the dispersion of GO-SiO₂ fillers and on GO-SiO₂/natural rubber composite by spray sputtering drying method was investigated. The experimental results show that higher or lower pressure is not conducive to the preparation of high-performance masterbatch. When the spray pressure is 0.8 MPa, the dispersion effect of GO-SiO₂ filler in the rubber is the best, and GO-SiO₂/natural rubber composite has the best comprehensive properties. The tensile strength is 31.2 MPa, the tear strength is 89.01 kNm^-1, the elongation at break is 670.90%, and the loss factor is lower at about 60℃.