Knowledge Management System of Institue of Mechanics, CAS
| Non-Gravitational Effects with Density-Matching in Evaluating the Influence of Sedimentation on Colloidal Coagulation | |
Liu J(刘捷) ; Sun ZW(孙祉伟); A Y(阿燕); Sun, ZW (reprint author), Chinese Acad Sci, Inst Mech, NML, Beijing 100080, Peoples R China.
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| 发表期刊 | Chinese Physics Letters
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| 2005 | |
| 卷号 | 22期号:12页码:3199-3202 |
| ISSN | 0256-307X |
| 摘要 | The method of density matching between the solid and liquid phases is often adopted to effectively eliminate the effect of sedimentation of suspensions in studies on dynamic behaviour of a colloidal system. However, the associated changes in the solvent composition may bring side effects to the properties investigated and therefore might lead to a faulty conclusion if the relevant correction is not made. To illustrate the importance of this side effect, we present an example of the sedimentation influence on the coagulation rate of suspensions of 2 μm (diameter) polystyrene. The liquid mixtures, in the proper proportions of water (H2O), deuterium oxide (D2O) and methanol (MeOH) as the liquid phase, density-matched and unmatched experiments are performed. Besides the influence of viscosity, the presence of methanol in solvent media, used to enhance the sedimentation effect, causes significant changes (reduction) in rapid coagulation rates compared to that in pure water. Without the relevant corrections for those non-gravitational factors it seems that gravitational sedimentation would retard the coagulation. The magnitude of the contribution from the non-gravitational factor is quantitatively determined, making the relevant correction possible. After necessary corrections for all factors, our experiments show that the influence of the sedimentation on coagulation rates at the initial stage of the coagulation is not observable. |
| 学科领域 | 力学 |
| 收录类别 | SCI ; EI ; CSCD |
| 语种 | 英语 |
| WOS记录号 | WOS:000233799600061 |
| 关键词[WOS] | PERIKINETIC COAGULATION ; RAPID COAGULATION ; SHEAR-FLOW ; GRAVITY ; AGGREGATION ; DISPERSION ; STABILITY |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Multidisciplinary |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/15979 |
| 专题 | 力学所知识产出(1956-2008) |
| 通讯作者 | Sun, ZW (reprint author), Chinese Acad Sci, Inst Mech, NML, Beijing 100080, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Liu J,Sun ZW,A Y,et al. Non-Gravitational Effects with Density-Matching in Evaluating the Influence of Sedimentation on Colloidal Coagulation[J]. Chinese Physics Letters,2005,22,12,:3199-3202. |
| APA | 刘捷,孙祉伟,阿燕,&Sun, ZW .(2005).Non-Gravitational Effects with Density-Matching in Evaluating the Influence of Sedimentation on Colloidal Coagulation.Chinese Physics Letters,22(12),3199-3202. |
| MLA | 刘捷,et al."Non-Gravitational Effects with Density-Matching in Evaluating the Influence of Sedimentation on Colloidal Coagulation".Chinese Physics Letters 22.12(2005):3199-3202. |
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