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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
Source PublicationSoft Matter
2011
Volume7Issue:24Pages:11298-11308
ISSN1744-683X
AbstractThis 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.
KeywordDynamic Light-scattering Heteroaggregation Rate Constants Collision Efficiency Factor Aggregation Rate Constants Turbidity Measurement Cross-sections Microscopic Approach Polystyrene Latex Optical Tweezers Particle Dimers
Subject AreaChemistry ; Materials Science ; Physics ; Polymer Science
DOI10.1039/c1sm06237a
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000297425700002
WOS KeywordDYNAMIC 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 AreaChemistry ; Materials Science ; Physics ; Polymer Science
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Physics, Multidisciplinary ; Polymer Science
Funding OrganizationWe 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.
DepartmentNML复杂流体
Classification一类
Citation statistics
Cited Times:21[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/45107
Collection国家微重力实验室
Corresponding AuthorSun, 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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