Rapid sedimentation of poly(methyl methacrylate) spheres and montmorillonite particles in water upon application of a DC electric field of the order of a few V/mm
Rapid sedimentation of poly(methyl methacrylate) spheres and montmorillonite particles in water upon application of a DC electric field of the order of a few V/mm
复制标题
施加几伏/毫米量级的直流电场后，聚甲基丙烯酸甲酯球和蒙脱石颗粒在水中快速沉降
DOI：
10.1016/j.clay.2014.09.030
复制
发表时间：
2014
影响因子：
5.6
通讯作者：
Akira TSUCHIDA
中科院分区：
文献类型：
--
作者：
Hiroshi KIMURA;Shinya TAKAHASHI;Akira TSUCHIDA
研究发现，当施加几 V/mm DC 量级的电场时，胶体颗粒（聚甲基丙烯酸甲酯 (PMMA) 球和蒙脱石 (Mt) 颗粒）在水中的沉降速度急剧增加。当颗粒体积分数为0.0001-0.001、电场强度小于或等于1.0 V/mm DC时，这些颗粒的沉降速度可达其数百倍。颗粒很可能相互聚集并形成一些絮凝物，从而导致其沉降速度增加。对于其他各种胶体分散体也会出现这种现象。这一发现为利用电场控制液体中各种胶体颗粒的分散状态以及简单高效的颗粒去除装置的应用提供了巨大的潜力。
It was discovered that the sedimentation velocity of colloidal particles (poly(methyl methacrylate) (PMMA) spheres and montmorillonite (Mt) particles) in water increased drastically when an electric field of the order of a few V/mm DC was applied. These particles showed up to several hundred times its sedimentation velocity in the case that the volume fraction of particles was 0.0001–0.001, and the electric field strength was less than or equal to 1.0 V/mm DC. It is highly plausible that the particles gather each other and form some flocs, which leads to the increase in its sedimentation velocity. This phenomenon would appear for other various colloidal dispersions. This finding offers great potential for controlling the dispersion state of various colloidal particles in liquids using an electric field and application for a simple and efficient particle removal device.