醇酯法表面改性超细二氧化硅的研究

The Effect of Normal Alcohols on the Hydrophobicity of Fine Silica

研究了几种不同的正烷醇对二氧化硅超细颗粒进行改性时,改性剂的链长、用量、反应温度、反应时间等条件对改性后二氧化硅的疏水性的影响,找出了改性反应的最佳条件,并对其影响原因做了分析。研究结果表明,醇酯法对二氧化硅超细颗粒进行改性时的最佳条件是: 正烷醇的碳链长度大于8,改性剂用量10％～15％,反应温度225℃,反应时间3 H。

When modified with normal alcohols, the hydrophobicity of silica is influenced by many factors, including the chain length of normal alcohols, the amount of alcohols, reaction temperature and time. The research results show that the optimal conditions are the chain length of normal alcohols Cs, the amount of alcohol between 10-15wt%, the temperature of 225 ℃ and the reaction time of 3h.