Interplay between Caging and Bonding in Binary Concentrated Colloidal Suspensions

doi:10.1021/acs.langmuir.7b03965

	Interplay between Caging and Bonding in Binary Concentrated Colloidal Suspensions
	Cheng, H; Jia, D; Cheng H(程贺); Jia D(贾迪); Han, CC
刊名	LANGMUIR
	2018
卷号	34 期号:9 页码:3021-3029
ISSN号	0743-7463
DOI	10.1021/acs.langmuir.7b03965
文献子类	Article
英文摘要	When a liquid becomes dynamically arrested, a gel, a repulsive glass, or an attractive glass state will form. Bonding and caging mechanisms decide their static structures and dynamic properties. To better understand their interplay, the competition between bonding and caging in a binary mixture of polystyrene core/poly(N-isopropylacrylamide) shell (CS) microgels and sulfonated polystyrene (PSS) particles is studied. CS microgels have short-range attraction above the volume phase transition temperature, whereas PSS species experiences relatively long-range electrostatic repulsion. Adding more PSS into the binary mixture will, of course, increase the total effective volume fraction but lead to different properties in gel or glass states. For instance, in gels, it increases the localization length and weakens the gel, whereas in glass, it decreases the localization length and strengthens the glass. This thus implies that the static and dynamic properties of gels are mainly controlled by bonding and those of both repulsive and attractive glasses are governed by caging. On the other hand, increasing the temperature will decrease the effective volume fraction because of the volume phase transition of the CS microgels. A discontinuous repulsive glass-to-liquid-to-gel transition can be observed when the PSS concentration is low, but a continuous repulsive glass-to-gel transition can also be observed with the increase of the PSS concentration. This may hint that glass transition and physical gelation share a similar mechanism, whereas the former has a longer relaxation time.
WOS关键词	CORE-SHELL LATEX ; HARD-SPHERE SUSPENSIONS ; GLASS-TRANSITION ; ATTRACTIVE INTERACTIONS ; MICROGEL SUSPENSIONS ; VOLUME TRANSITION ; SOFT ; RHEOLOGY ; PARTICLES ; GELATION
WOS研究方向	Chemistry ; Materials Science
语种	英语
WOS记录号	WOS:000427095400013
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/285711]
专题	高能物理研究所_东莞分部高能物理研究所_实验物理中心
通讯作者	Cheng H(程贺)
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Cheng, H,Jia, D,Cheng H,et al. Interplay between Caging and Bonding in Binary Concentrated Colloidal Suspensions[J]. LANGMUIR,2018,34(9):3021-3029.
APA	Cheng, H,Jia, D,程贺,贾迪,&Han, CC.(2018).Interplay between Caging and Bonding in Binary Concentrated Colloidal Suspensions.LANGMUIR,34(9),3021-3029.
MLA	Cheng, H,et al."Interplay between Caging and Bonding in Binary Concentrated Colloidal Suspensions".LANGMUIR 34.9(2018):3021-3029.