Toward an understanding of the turbidity measurement of fleterocoagulation rate constants of dispersions containing particles of different sizes

CORC > 力学研究所 > 中国科学院力学研究所 > 力学所知识产出(1956-2008)

	Toward an understanding of the turbidity measurement of fleterocoagulation rate constants of dispersions containing particles of different sizes
	Liu J(刘捷); Xu SH(徐升华); Sun ZW(孙祉伟)
刊名	Langmuir
	2007
通讯作者邮箱	sunzw@imech.ac.en
卷号	23 期号:23 页码:11451-11457
关键词	Heteroaggregation Rate Constants Dynamic Light-Scattering Polymer Colloids Heterocoagulation Coagulation Homocoagulation Aggregation Stability Kinetics Latex
ISSN号	0743-7463
通讯作者	Sun, ZW (reprint author), Chinese Acad Sci, Inst Mech, Beijing 100080, Peoples R China.
中文摘要	Our previous studies have shown that the determination of coagulation rate constants by turbidity measurement becomes impossible for a certain operating wavelength (that is, its blind point) because at this wavelength the change in the turbidity of a dispersion completely loses its response to the coagulation process. Therefore, performing the turbidity measurement in the wavelength range near the blind point should be avoided. In this article, we demonstrate that the turbidity measurement of the rate constant for coagulation of a binary dispersion containing particles of two different sizes (heterocoagulation) presents special difficulties because the blind point shifts with not only particle size but also with the component fraction. Some important aspects of the turbidity measurement for the heterocoagulation rate constant are discussed and experimentally tested. It is emphasized that the T-matrix method can be used to correctly evaluate extinction cross sections of doublets formed during the heterocoagulation process, which is the key data determining the rate constant from the turbidity measurement, and choosing the appropriate operating wavelength and component fraction are important to achieving a more accurate rate constant. Finally, a simple scheme in experimentally determining the sensitivity of the turbidity changes with coagulation over a wavelength range is proposed.
类目[WOS]	Chemistry, Multidisciplinary ; Chemistry, Physical ; Materials Science, Multidisciplinary
研究领域[WOS]	Chemistry ; Materials Science
关键词[WOS]	HETEROAGGREGATION RATE CONSTANTS ; DYNAMIC LIGHT-SCATTERING ; POLYMER COLLOIDS ; HETEROCOAGULATION ; COAGULATION ; HOMOCOAGULATION ; AGGREGATION ; STABILITY ; KINETICS ; LATEX
收录类别	SCI
语种	英语
WOS记录号	WOS:000250584500024
公开日期	2009-08-03
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/33875]
专题	力学研究所_力学所知识产出(1956-2008)
推荐引用方式 GB/T 7714	Liu J,Xu SH,Sun ZW. Toward an understanding of the turbidity measurement of fleterocoagulation rate constants of dispersions containing particles of different sizes[J]. Langmuir,2007,23(23):11451-11457.
APA	刘捷,徐升华,&孙祉伟.(2007).Toward an understanding of the turbidity measurement of fleterocoagulation rate constants of dispersions containing particles of different sizes.Langmuir,23(23),11451-11457.
MLA	刘捷,et al."Toward an understanding of the turbidity measurement of fleterocoagulation rate constants of dispersions containing particles of different sizes".Langmuir 23.23(2007):11451-11457.