Production of carbon black/silica composite particles by adsorption of poly(vinyl pyrrolidone)

Conclusions

To reinforce the mechanical and electrical properties of materials, carbon black has been widely used as a filler in polymer industry because of its excellent properties such as heat, chemical, and weathering resistance, lightweight, electroconductivity, and low thermal expansion.^1,2 The dispersibility of carbon black is important to show such abilities in organic solvents and polymer matrices. Therefore, many researches have been reported that the dispersibility of carbon black in solvents and polymer matrices is remarkably improved by grafting of polymers on the surface of carbon black.^3,4 Silica offers a unique combination of tear strength, abrasion resistance, and aging resistance compared to carbon black.⁵ In tire treads, silica yields a lower rolling resistance at an equal wear resistance and wet grip than carbon black.⁶ Therefore, the use of a dual filler system separately composed of carbon black and silica in polymer matrices can give the benefits from each component.⁷ To the best of our knowledge, carbon black/silica hybrid composite particles have not prepared to date.