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[篇名]
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粉煤灰制二氧化硅表面疏水改性机理研究
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[著者]
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朱建军; 谢吉民
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[机构]
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江苏大学化学化工学院，江苏 镇江 212013
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[中文关键词]
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粉煤灰; 纳米二氧化硅; 硅烷偶联剂;
表面改性
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[外文关键词]
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fly ash nanoosilica silane coupling
agent surface modification
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[分类号]
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[刊名]
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非金属矿
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[出版时间]
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2008年1月
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[来源]
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VOL31,NO.1._7—9
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[中文摘要]
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以粉煤灰为硅源制备的二氧化硅为原料,采用硅烷偶联剂KH560对其进行表面改性。结果表明:硅烷偶联剂与二氧化硅表面的羟基发生反应,纳米二氧化硅的分散性和表面疏水性大为提高。当mSCA/msilica为0.05、反应时间为6h,纳米二氧化硅的平均粒径最小,改性效果也最好;文中分析了硅烷偶联剂KH-560与二氧化硅的改性机理。
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[外文摘要]
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Silica based
on fly ash as precursor was modified with silane
coupling agent(KH-560). The research results
showed that because silane coupling agent had
reacted with hydroxyl group, dispersibilty and
surface hydrophobicity of silica were improved well.
When the ratio of mSCA /msilica
is 0.05 and reaction time is 6 hours, the mean diameter of silica particles
is the least and the modification effect is best. Reaction mechanism,
according to which silica reacts with silane
coupling agent, is analyzed.
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