雾化喷射压力对氧化石墨烯-SiO2/天然橡胶复合材料性能的影响

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

  • 摘要: 采用自主研发的雾化溅射干燥法制备氧化石墨烯(GO)-SiO2/天然橡胶复合材料,基于雾化法中物料液柱在高压作用下撞击高温金属壁面发生溅射爆破,实现液滴的二次分散和水分的瞬间脱除,保持填料GO-SiO2在天然胶乳中的高分散状态。探究了雾化溅射干燥法喷射压力大小对填料GO-SiO2分散的影响及对GO-SiO2/天然橡胶复合材料性能的影响。实验表明,过高或过低的压力都不利于高性能GO-SiO2/天然橡胶母胶的制备,当喷射压力为0.8 MPa时,填料GO-SiO2在天然橡胶的分散效果最好,制备的GO-SiO2/天然橡胶复合材料的综合性能最优,其中拉伸强度为31.2 MPa,撕裂强度达到89.01 kNm-1,断裂伸长率为670.90%,在60℃左右损耗因子更低。

     

    Abstract: 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℃.

     

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