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《Materials Review》 2018-S1
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Effect of Dispersion Characteristics of Nano-SiO_2/CaCO_3/Al_2O_3 by Ultrasonic and Dispersants

XU Yaoqun;LI Shuguang;WANG Juan;WU Xiaopeng;College of Water Conservancy and Environment Engineering,Zhengzhou University;State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,China Institute of Water Resources and Hydropower Research;  
In the field of materials science,the uniform dispersion of particles is the basis for obtaining the material products with better microstructure and properties.In this paper,the dispersion properties of nano-SiO_2,nano-CaCO_3 and nano-Al_2O_3 particles under the combined action of ultrasonic and different dispersion stabilizers were studied,and the dispersion effect was characterized by spectrophotometer method.The dispersion mechanism was discussed in combination with DLVO theory,and the optimal dispersant solution was given.The results show that the ultrasonic can effectively break the agglomeration and different dispersants have different dispersion effects on different nano-particles,the effect of dispersant SHMP and SDBS increased first and then decreased with the increase of dosage,and the effect of dispersant PCS increased with the increase of dosage;the type and amount of dispersant will affect the double-layer thickness and the micro-environment around the particles,which will affect the stability of the dispersion.
【Fund】: 十三五计划(2016YFB0303601);; 国家自然科学基金(51409284;51309203);; 中国水利水电科学研究院流域水循环模拟与调控国家重点实验室课题(2016TS10;SKL2017CGS05;IWHR-SKL-201512)
【CateGory Index】: TB383.1
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