Anti-aggregation dispersion of ultra fine particles by electrostatic technique |
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Authors: | Jun Ren Shouci Lu Jian Shen Chunhong Yu Boxing Hu |
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Affiliation: | REN Jun, LU Shouci, SHEN Jian, YU Chunhong & HU Boxing 1. Center of Research on Surface and Interface Chemical Engineering and Technology, Nanjing University, Nanjing 210093, China; 2. College of Resources Engineering, University of Science and Technology Beijing, Beijing 100083, China |
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Abstract: | The dispersion of ultrafine particles in the air can be achieved by mechanical method or surface modification. In this work, the electrostatic technique was first employed for anti-aggregation of ultrafine particles. When the relative humidity of the air is within the region of 70%-75%, effective storage time of ultrafine particles can reach 72 h after treatment by the electrostatic technique. The experimental results showed that this technique imparted ultrafine particles much more pronounced anti-aggregation property. In the dry air, the critical diameter of ultrafine particles anti-aggregated by the electrostatic technique is the function of particle property and charging field intensity. The critical diameter is inversely proportional to the square of the charging field intensity. |
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Keywords: | ultrafine particle anti-aggregation dispersion electrostatic technique dispersion degree. |
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