氢氧化铝镁正电溶胶稳定性研究

氢氧化铝镁正电溶胶 (以下简称溶胶 )是近几年研制开发的一种新型正电溶胶 ,在油田、化妆品、涂料、污水处理等领域具有广阔的应用前景 .我们曾对溶胶制备、组成、结构1～ 4] 及其在油田钻井液中的应用做了大量研究工作5 ,6] ,但关于溶胶的稳定性研究尚少 .本文从恒表面电荷密度模型出发 ,对溶胶进行了近似处理 ,得到了势能曲线 ,并采取动态法研究了无机电解质对溶胶的聚沉规律 .1　实验部分1 .1　氢氧化铝镁正电溶胶的合成　按文献 1 ]非稳态共沉淀法制备 ,ＡｌＣｌ3·6Ｈ2 Ｏ与ＭｇＣｌ2 ·6Ｈ2 Ｏ的物质的量比为 1∶1 .1 .2　组成和电…

Studies on the Stability of Aluminium Magnesium Hydroxide Positive Sol

The potential equation in the positive sol of aluminium magnesium hydroxide was deduced according to the model of constant surface charge density, and the potential curves in the NaBr solution were obtained. The studies of coagulation kinetics showed that the coagulation process of monovalent anions may be divided into a rapid and slow coagulation. The efficiencies in causing coagulation for monovalent anions followed the order Br-＞I-＞NO-3＞-3Cl-, which didn′t correspond to the lyotropic series. The coagulation value of polyanion had a discrepancy with Shulze-Hardy law. The higher the cation valent was, the stronger the stabilization of sol was.