Surface modification of carbon black and its effect on the thermal conductivity of carbon black/silicone rubber

Carbon black (CB) was modified with hydroxyl silicone oil to improve the compatibility between CB and silicone rubber (SR), which resulted in diminishing the thermal interfacial resistance between CB and silicone rubber, for preparing CB/SR composites with high thermal conductivity. The compatibility between CB and SR, as well as the thermal conductivity of the CB/SR composites was investigated. The results show that the surface modified CB has a better compatibility with silicone rubber compared with the origin CB. When the loading of the modified CB was 36.59%, the thermal conductivity of the modified CB/SR composites can be as high as 0.591 W?(m稫)^-1, 38.7% higher than that of the origin CB/SR composites with the same loading.