Hydrolysis and Dispersion Properties of Aqueous Y2Si2O7 Suspensions

doi:10.1111/j.1551-2916.2008.02860.x

IMR OpenIR

	Hydrolysis and Dispersion Properties of Aqueous Y2Si2O7 Suspensions
	Sun, Ziqi 1,2; Zhu, Xinwen 3,4; Li, Meishuan 1; Zhou, Yanchun 1; Sakka, Yoshio 3,4
通讯作者	Zhou, Yanchun(yczhou@imr.ac.cn)
	2009
发表期刊	JOURNAL OF THE AMERICAN CERAMIC SOCIETY
ISSN	0002-7820
卷号	92 期号:1 页码:54-61
摘要	The dispersion of aqueous gamma-Y2Si2O7 suspensions, which contain only one component but have a complex ion environment, was studied by the introduction of two different polymer dispersants, polyethylenimine (PEI) and polyacrylic acid (PAA). The suspension without any dispersant remains stable in the pH range of 9-11.5 because of electrostatic repulsion, while it is flocculated upon stirring due to the readsorption of hydrolyzed ions on the colloid surface. However, suspensions with 1 dwb% PEI exhibit greater stability in the pH range of 4-11.5. The addition of PEI shifts the isoelectric point (IEP) of the suspensions from pH 5.8 to 10.8. Near the IEP (pH(IEP)=10.8), the stability of the suspensions with PEI is dominated by the steric effect. When the pH is decreased to acid direction, the stabilization mechanism is changed from steric hindrance to an electrosteric effect little by little. PAA also has the effect of reducing the hydrolysis speed via a "buffer effect" in the basic pH range, but the lack of adsorption between the highly ionized anionic polymer molecules and the negative colloid particle surfaces shows no positive effect on hydrolysis of colloids and on the stabilization of Y2Si2O7 suspensions.
资助者	National Outstanding Young Scientist Foundation ; Natural Sciences Foundation of China ; National Institute for Materials Science, Japan ; Japanese Ministry of Education, Culture, Sports, Science and Technology ; World Premier International Research Center Initiative (WPI Initiative) on Materials Nanoarchitronics, MEXT, Japan
DOI	10.1111/j.1551-2916.2008.02860.x
收录类别	SCI
语种	英语
资助项目	National Outstanding Young Scientist Foundation[59925208] ; Natural Sciences Foundation of China[50232040] ; Natural Sciences Foundation of China[50302011] ; Natural Sciences Foundation of China[90403027] ; Natural Sciences Foundation of China[50772114] ; National Institute for Materials Science, Japan ; Japanese Ministry of Education, Culture, Sports, Science and Technology ; World Premier International Research Center Initiative (WPI Initiative) on Materials Nanoarchitronics, MEXT, Japan
WOS研究方向	Materials Science
WOS类目	Materials Science, Ceramics
WOS记录号	WOS:000262229500010
出版者	WILEY-BLACKWELL
引用统计	被引频次：18[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/99466
专题	中国科学院金属研究所
通讯作者	Zhou, Yanchun
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 3.Natl Inst Mat Sci, Nano Ceram Ctr, Tsukuba, Ibaraki 3050047, Japan 4.Natl Inst Mat Sci, WPI Ctr MANA, Tsukuba, Ibaraki 3050047, Japan
推荐引用方式 GB/T 7714	Sun, Ziqi,Zhu, Xinwen,Li, Meishuan,et al. Hydrolysis and Dispersion Properties of Aqueous Y2Si2O7 Suspensions[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY,2009,92(1):54-61.
APA	Sun, Ziqi,Zhu, Xinwen,Li, Meishuan,Zhou, Yanchun,&Sakka, Yoshio.(2009).Hydrolysis and Dispersion Properties of Aqueous Y2Si2O7 Suspensions.JOURNAL OF THE AMERICAN CERAMIC SOCIETY,92(1),54-61.
MLA	Sun, Ziqi,et al."Hydrolysis and Dispersion Properties of Aqueous Y2Si2O7 Suspensions".JOURNAL OF THE AMERICAN CERAMIC SOCIETY 92.1(2009):54-61.