Study On Rubber Filler Of Silica Preparation High Dispersion,High Thermal Conductivity And Modified With Ionic Liquid

In recent years, with the increasingly serious problems such as haze, more and more focus on the pollution emissions generated by the car, the development of green tire become an effective means to solve the air pollution. White carbon black(Si O2 n H2O) as rubber filled reinforcing agent, in rubber industry amount is very large, especially in high temperature vulcanized silicone rubber, add up to 40% ~ 50%. But due to the poor thermal conductivity of silica and its molecular structure of the surface very hydrophilic is strong, and the rubber hydrocarbon molecules cannot quite compatible, if the silica filler in rubber, not only reduces the reinforcing effect and rubber compression deformation, wear, extending stress and work performance were better than that of carbon black and other gum filler. Ionic liquid thermal stability(decomposition temperature is higher than 400 ℃), good thermal conductivity and according to the actual demand and different properties of any combination of yin and Yang ionic functional groups, the load in silica internal pore structure to be modified. The modified silica filled rubber can improve the thermal properties and mechanical properties of rubber.This paper use the [BMIM]Br, [BMIM]BF4, [BPy]Br, [BPy]BF4 four ionic liquid on the white carbon black load modification, on the modification of silica were by Fourier transform infrared(FT-IR) spectroscopy, scanning electron microscopy(SEM), DBP determination and nitrogen adsorption desorption-specific surface area analysis(BET), the application of modified silica and rubber refining mix colloid, and the effects of changes in the heat conduction coefficient of rubber.The experimental results show that 4 kinds of ionic liquids were supported on silica, and the rubber thermal conductivity has been improved. The quality scores for 20% of the [BMIM]BF4 modified white carbon black mixed refined rubber thermal conductivity effect best, heat conduction coefficient by changing the 0.1783 W/(m2·K) increased to the 0.2955 W/(m2·K), thermal conductivity improve 65.7%, mass fraction of ionic liquid for 20% of the [BMIM]BF4 modified silica hydrophobic also by original 2.00 m L / g increased to 300 m L / g; modified white carbon black filled rubber, the tensile strength of rubber from the original 13.5/MPa to 14.3/MPa.