| Hydrolysis and Dispersion Properties of Aqueous Y2Si2O7 Suspensions | |
| Sun, Ziqi1,2; Zhu, Xinwen3,4; Li, Meishuan1; Zhou, Yanchun1; Sakka, Yoshio3,4 | |
| Corresponding Author | Zhou, Yanchun(yczhou@imr.ac.cn) |
| 2009 | |
| Source Publication | JOURNAL OF THE AMERICAN CERAMIC SOCIETY
 |
| ISSN | 0002-7820 |
| Volume | 92Issue:1Pages:54-61 |
| Abstract | 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. |
| Funding Organization | 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 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 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 Research Area | Materials Science |
| WOS Subject | Materials Science, Ceramics |
| WOS ID | WOS:000262229500010 |
| Publisher | WILEY-BLACKWELL |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/99466 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Zhou, Yanchun |
| Affiliation | 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 |
| Recommended Citation 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. |
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