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采用超声加热法合成了五配位硅化合物,并考察了超声辐射时间和脉冲方式对其产率的影响;以所得的五配位硅化合物为原料合成了苯乙烯基四配位硅化合物,并用其对沉淀法白炭黑进行了表面改性;采用傅里叶红外光谱仪、综合热分析仪、接触角测定仪和激光粒度分析仪对改性前后白炭黑的结构、形貌进行了表征,并测试了补强胶料的拉伸强度。结果表明:超声辐射10min,递增脉冲方式可使五配位硅化合物的产率达到84.5%;随苯乙烯基四配位硅用量的增加,改性白炭黑的水接触角逐渐增大;当四配位硅用量为白炭黑质量的10%时,用其补强的硫化硅橡胶的拉伸强度最大,达到6.71MPa;改性后白炭黑团聚现象明显改善,粒径分布变窄,团聚体平均粒径显著减小。
Five-coordinated silicon compounds were synthesized by ultrasonic heating. The effects of ultrasonic irradiation time and pulse mode on their yield were also investigated. Styryl tetra-coordination silicon compounds were synthesized from the resulting five-coordinated silicon compounds The surface modification of the precipitated silica was carried out. The structure and morphology of the silica before and after modification were characterized by Fourier transform infrared spectroscopy, thermal analysis, contact angle measurement and laser particle size analyzer. And tested the tensile strength of reinforcing compounds. The results showed that the yield of pentacene-silicon compound reached 84.5% by ultrasonic pulse for 10min, and the contact angle of modified silica increased with the increase of the amount of styryl tetra-coordinative silicon When the amount of four-coordination silicon is 10% of the mass of silica, the tensile strength of the vulcanized silicone rubber with the reinforcement is the highest, reaching 6.71MPa. After the modification, the agglomeration of silica improves obviously, the particle size distribution becomes narrower, The average aggregate size decreased significantly.