硅烷偶联剂改性纳米高岭土的研究

Surface Modification of Nanokaolin by Silane Coupling Agent

采用硅烷偶联剂对纳米高岭土进行表面改性，研究了改性剂用量、改性时间、改性温度等因素对改性效果的影响．并采用沉降体积、IR、XPS等手段研究了改性效果以及改性剂与高岭土之间的相互作用？结果表明．改性的最佳实验条件为：改性剂用量为1％-2％．改性温度为90℃；纳米高岭土经过改性处理后，在液体石蜡中的分散性和稳定性均得到明显改善；偶联剂与高岭土之间以化学键合作用为主.

The nanokaolin was surface modified with silane coupling agent. Many factors, including modifier dosage, modification time and temperature, were all considered in the detailed experiments. The prepared samples were characterized by sedimentation volume, FTIR and XPS techniques. The optimum technological conditions are obtained, which are as follows： modifier dosage is 1% to 2% and modification temperature is 90℃. In addition, the modified nanokaolin has good dispersibility and stability, in liquid paraffine, and the silane coupling agent was bound to the surface of nanokaolin particles.