超分散剂对超细SiO2分散稳定性的影响

来源期刊:中南大学学报(自然科学版)2005年第2期

论文作者:张清岑 肖奇 刘建平

文章页码:225 - 228

关键词:超分散剂; SiO2;分散稳定性

Key words:dispersant; SiO2; dispersion stabilizatio

摘    要:研究了超分散剂PSE加入前、后pH值变化对超细SiO2分散稳定的影响,测量了分散体系吸光度和ζ电位,探讨了分散剂浓度与超分散剂吸附量的关系。应用扩展的DLVO理论,对影响系统分散稳定的各种因素进行了分析。研究结果表明,当超分散剂质量浓度为1.6 mg/L时最有利于SiO2分散;超分散剂对于超细SiO2的分散稳定主要受空间位阻支配,受pH值影响较小。

Abstract: The dispersion stabilization of ultra-fine SiO2was studied. Theζpotential and absorbency of solutions with and without dispersants were analyzed respectively. The relationship between concentration of dispersant PSE and its absorption on the surface of SiO2particles was studied. The influencing factors were discussed, according to Extent-DLVO theory. The results show that the optimal dosage of PSE is 1.6 mg/L and the steric hindrance instead of the pH value is the main influencing factor.

基金信息:国家自然科学基金资助项目

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