| 超微SiO2的分散机理 |
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| 引用本文： | 黄苏萍,张清岑.超微SiO2的分散机理[J].中国有色金属学报,2001,11(3):522-526. |
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| 作者姓名： | 黄苏萍 张清岑 |
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| 作者单位： | 中南大学矿物工程系, |
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| 摘 要： | 用沉降法研究了超微SiO2在水溶液中的分散行为，探讨了超分散剂PSE与传统分散剂的分散效果，并通过颗粒间相互作用能计算进一步研究了超分散剂PSE的作用机理。结果表明：A－B嵌段型超分散剂PSE的分散效果最好，且不受介质pH的影响，其分散稳定作用的实质是增强了微粒间的静电排斥作用和空间位阻排斥作用，并减弱了范德华吸引作用。
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| 关 键 词： | 超分散剂 分散 沉降法 超微粉体 二氧化硅 分散剂 水熔液 |
| 文章编号： | 1004-0609(2001)03-0522-05 |
| 修稿时间： | 2000年7月8日 |
Dispersion mechanism of
ultrafine silica |
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| HUANG Su-ping,ZHANG Qing-cen.Dispersion mechanism of
ultrafine silica[J].The Chinese Journal of Nonferrous Metals,2001,11(3):522-526. |
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| Authors: | HUANG Su-ping ZHANG Qing-cen |
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| Abstract: | The dispersion behavior of ultrafine silica in aqueous system was investigated by the sedimentation test， and the effect of hyperdispersant PSE was studied comparing with traditional dispersants. Furthermore， the mechanism of PSE in the systems was revealed through calculating the interaction energies between particles. It is showed that the diblock hyperdispersant PSE is efficient and not affected by the pH of medium, and its main action is to increase the electrostatic force and the steric force and decrease the Van der Waals force due to adsorption dispersants. |
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