| Silica is an important reinforcing filler in the rubber industry,whose effect is only inferior to carbon black,ionic liquids is widely used in surface-modified inorganic filler as a"green solvent".In this paper,the ionic liquid,1-allyl-3-methylimidazolium chloride(AMI)was used to modify silica and graphene oxide(GO),which filled natural rubber(NR).The effect of modified filler and its content on the bound rubber,curing characteristics,mechanical properties,aging properties,dynamic properties and thermal conductivity were investigated.The results showed that the hydrogen bonding interactions occurred between AMI and silica.With the increasing of the amount of the modified silica,the content of bound rubber rose,cure time increased,the cure rate decreased,the crosslink density of the rubber rose.Compared to the unmodified silica-filled NR,the tensile strength,tear strength and abrasion resistance of the NR with 30phr modified silica were increased by 96.54%,27.94%and 16.93%,respectively.with the content of AMI increasing,the content of bound rubber first rose and then fell,cure time was reduced,the cure rate was increased,the crosslink density of the rubber rose,abrasion resistance and fatigue properties decreased significantly,and the best content for AMI was 2.0phr.With the increase of the content of the modified GO,abrasion resistance and fatigue properties of composite decreased,thermal diffusivity and thermal conductivity decreased gradually,meanwhile,the thermal conductivity achieved the best at 0.5phr modified GO.When the modified GO content was 1.Ophr,the storage modulus improved,tensile strength and tear strength was best,which were increased by 17.15%and20.04%,respectively,compared with the NR filled silica alone. |
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