天然橡胶/炭黑/二硫化钼复合材料的制备和性能研究

Preparation and Properties of NR/Carbon Black/Molybdenum Disulfide Composites

采用超声粉碎法制备二硫化钼(MoS2)纳米碎片,以不同用量的MoS2(纳米碎片)等量替代天然橡胶(NR)/炭黑(CB)复合材料中部分CB,制得NR/CB/MoS2复合材料,研究不同用量MoS2等量替代部分CB对复合材料Payne效应、硫化特性、物理性能、耐磨性能和动态力学性能的影响。结果表明:少量MoS2等量代替部分CB有助于复合材料中填料分散,MoS2用量过大则使填料又趋于聚集;少量MoS2等量代替部分CB会减弱复合材料的Payne效应,有利于提高复合材料的物理性能和耐磨性能,但对复合材料的滚动阻力和抗湿滑性能影响较小;过量MoS2等量代替部分CB,则其对复合材料的补强能力减弱,甚至导致复合材料性能下降。

Molybdenum disulfide(MoS2)nanoparticles were obtained by ultrasonic method,and the natural rubber(NR)/carbon black(CB)/MoS2 composites were prepared by using MoS2 nanoparticles to replace equal amount of CB in the NR/CB composites.The influence of MoS2 on the Panye effect,vulcanization characteristics,physical properties,wear resistance and dynamic mechanical properties of the composites was investigated.The results showed that adding a small amount of MoS2 could improve the filler dispersion.However,when the amount of MoS2 increased,the fillers tended to aggregate again.Payne effect of the composites was weakened by using a small amount of MoS2,the physical properties and wear resistance were enhanced,and the rolling resistance and wet-slip resistance of the composites were only slightly affected.When the amount of MoS2 increased to a large number,the reinforcement was weakened,and the performance of the composites deteriorated.