| Progress in coagulation rate measurements of colloidal dispersions | |
Xu SH(徐升华) ; Sun ZW(孙祉伟); Sun, ZW (reprint author), Chinese Acad Sci, Key Lab Micrograv, Inst Mech, Beijing 100190, Peoples R China
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| Source Publication | Soft Matter
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| 2011 | |
| Volume | 7Issue:24Pages:11298-11308 |
| ISSN | 1744-683X |
| Abstract | This article reviews recent advances in coagulation rate measurements of colloidal dispersions, with emphasis on the turbidity method. For turbidity method, measurement of the coagulation rate relies upon the turbidity change resulting from the coagulation process, and the measuring sensitivity significantly depends on particle size and the wavelength used. There exists a "zero sensitivity" blind point for measurement at a specific wavelength, suggesting that such measurements should be performed at a wavelength some distance from the blind point. The major difficulty in determining absolute coagulation rate constant (CRC) by light scattering and turbidity measurements is how to theoretically solve the scattering problem of 2-particle aggregates. The T-matrix method accurately solves this problem, showing its superiority over various earlier theoretical approximations (applicable only to small particles). Results from studies on effects of forward scattering, multiple scattering, etc., provide guidelines for choosing proper particle size and volume fraction for the allowed margin of measurement error. Most of these findings on turbidity methods are also valid or applicable to other scattering methods. Finally, we introduce a new microscopic approach to assess the colloidal stability at individual particle levels, by means of directly observing artificially induced collision with the aid of optical tweezers. |
| Keyword | Dynamic Light-scattering Heteroaggregation Rate Constants Collision Efficiency Factor Aggregation Rate Constants Turbidity Measurement Cross-sections Microscopic Approach Polystyrene Latex Optical Tweezers Particle Dimers |
| Subject Area | Chemistry ; Materials Science ; Physics ; Polymer Science |
| DOI | 10.1039/c1sm06237a |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000297425700002 |
| WOS Keyword | DYNAMIC LIGHT-SCATTERING ; HETEROAGGREGATION RATE CONSTANTS ; COLLISION EFFICIENCY FACTOR ; AGGREGATION RATE CONSTANTS ; TURBIDITY MEASUREMENT ; CROSS-SECTIONS ; MICROSCOPIC APPROACH ; POLYSTYRENE LATEX ; OPTICAL TWEEZERS ; PARTICLE DIMERS |
| WOS Research Area | Chemistry ; Materials Science ; Physics ; Polymer Science |
| WOS Subject | Chemistry, Physical ; Materials Science, Multidisciplinary ; Physics, Multidisciplinary ; Polymer Science |
| Funding Organization | We thank Mr Michael R. Honig for his help in editing this manuscript. This work is supported by Grants 10972217, 10932012 and 11032011 from the National Natural Science Foundation of China. |
| Department | NML复杂流体 |
| Classification | 一类 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/45107 |
| Collection | 微重力重点实验室 |
| Corresponding Author | Sun, ZW (reprint author), Chinese Acad Sci, Key Lab Micrograv, Inst Mech, Beijing 100190, Peoples R China |
| Recommended Citation GB/T 7714 | Xu SH,Sun ZW,Sun, ZW . Progress in coagulation rate measurements of colloidal dispersions[J]. Soft Matter,2011,7,24,:11298-11308. |
| APA | Xu SH,Sun ZW,&Sun, ZW .(2011).Progress in coagulation rate measurements of colloidal dispersions.Soft Matter,7(24),11298-11308. |
| MLA | Xu SH,et al."Progress in coagulation rate measurements of colloidal dispersions".Soft Matter 7.24(2011):11298-11308. |
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