https://scholars.lib.ntu.edu.tw/handle/123456789/409360
標題: | Stability of a dispersion of particles covered by a charge-regulated membrane: Effect of the sizes of charged species | 作者: | Hsu J.-P. Huang S.-W. Kuo Y.-C. Tseng S. |
關鍵字: | Amphoteric surface;Charge-regulated surface;Ionic sizes;Stability ratio | 公開日期: | 2003 | 卷: | 262 | 期: | 1 | 起(迄)頁: | 73-80 | 來源出版物: | Journal of Colloid and Interface Science | 摘要: | The influence of the sizes of charged species on the stability of a colloidal dispersion is investigated theoretically. We consider the case where a particle comprises a rigid core and an amphoteric, charge-regulated membrane layer, which simulates biocolloids and particles covered by artificial membranes. A modified Poisson-Boltzmann equation, which takes the sizes of all the charged species into account, is adopted to describe the electrical field. The effects of other key parameters such as electrolyte concentration, pH, and the valence of counterions on the behavior of a dispersion are also examined. We show that the larger the effective size of the counterions, the greater the stability ratio, which is consistent with experimental observations in the literature. ? 2003 Elsevier Science (USA). All rights reserved. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/409360 | ISSN: | 00219797 | DOI: | 10.1016/S0021-9797(03)00197-8 |
顯示於: | 化學工程學系 |
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