巯丙基三乙氧基硅烷改性白炭黑的研究

In this paper，silica particles were modified with 3-mercaptopropyltrimethoxysilane coupling agent.The effect of silane coupling agent, modified conditions, and hydrolysis conditions on the properties of modificated silica were studied. TGA and Particle Size Distribution analysis show that the weight loss from 200 ℃ ~ 800 ℃ of the modified silica is more than that without modificaton, and the hydrophobic wk coefficient is reduced. This revealed that silane coupling agent has grafted to the surface of silica.When the amount of modifier is 3%, modified temperature is 80 ℃, the modified time is 2h, hydrolysis time is 30min, and pH of hydrolysis is 4,the modified silica has a bigger weight loss,and its hydrophobic wk coefficient is significantly lower.