The Research Of Modified Silicon Dioxide By Ionic Liquid In The Application Of The Tire And Rubber

Metal oxide and nitride oxide is a common rubber thermal conductive filler. But theyinfluence the processing performance of the rubber to a certain extent, and increase the weightof the rubber. At the same time, metal oxide’s and nitride oxide’s expensive price restrictedthe application. Therefore, this paper selects silicon dioxide reinforcing agent commonly usedin the the tire and rubber as a carrier thermal conductive additives. Although silicon dioxidedoesn’t have thermal conductivity or has small thermal conductivity, because of its internalpore, it can be modified by ionic liquids that have more available excellent chemical andthermodynamic stability, wide temperature range and excellent characteristics such as goodelectrical and thermal conductivity.This paper studies the thermal conductivity mechanism of different rubber filler. On thebasis of maintaining the good physical properties of rubber, silicon dioxide is modified by thegreen solvent of ionic liquid through load. And then put the modified silicon dioxide into therubber for mixed refining in order to improve the thermal conduction of rubber. Theexperiment analyzes FT-IR、TG、DSC and specific surface area of nitrogen adsorption-takeoff of these synthetic ionic liquids and silicon dioxide before and after the modification. Andthrough measuring of the coefficient of thermal conductivity, it inspects the influence ofmodified silicon dioxide to the thermal conductivity of rubber.The experimental results show that:[C5mim]PF6、[C6mim]PF6、[C8mim]PF6all the threekinds of hydrophobic ionic liquids are well loaded in silicon dioxide and improve thehydrophobicity of silicon dioxide. After the modification of the same numbers of carbonmolecule with different proportions and different numbers of carbon molecules with the sameproportion, the coefficient of thermal conductivity of the silicon dioxide is greater than theone before modification. The phenomenon explains the regularity of the silicon dioxide’sthermal conductivity that has been improved. Among them, the thermal conductivity ofsilicon dioxide modified by the [C5mim]PF630%has increased to the largest degree, whichreaches0.289W/(m.K). Compared to0.175W/(m.K) the coefficient of thermal conductivitybefore modification, the coefficient of thermal conductivity has increased65.14%. Taking reducing costs and saving energy consumption into consideration, this sample is most suitablefor the industrial production, which can achieve the requirements we use the technology ofionic liquids to produce rubber additives with high thermal conductivity and more improve"greening" level of tire rubber.