界面偶联剂KH550在氧化石墨烯/白炭黑纳米杂化填料中的应用研究

Silica was modified by γ-aminopropyltriethoxysilane（coupling agent KH550），then mechanically mixed with aqueous suspension of graphene oxide（GO），and KH550 modified GO/Silica nano-hybrid filler（GO@SiO₂） was prepared by spray-drying method．The effect of KH550 amount on the properties of the solution-polymerized styrene-butadiene rubber（SSBR）/butadiene rubber（BR）/GO@ SiO₂ composite was investigated．The results showed that，when the mass fraction of KH550 was 7% or 10% of silica，the thermal stability of GO@SiO₂ was better.Addition of KH550 could significantly improve the crosslink density，filler dispersion，wear resistance and reduce heat build-up of the composites．When the mass fraction of KH550 was 5% of silica，the crosslink density was the highest and the comprehensive physical properties of the composite were the best．When the mass fraction of KH550 was 10% of silica，the wear resistance of the composite was the best and the heat build-up was the lowest.