2014 Fiscal Year Final Research Report
Interactions and phase change dynamics of water in limited space.
| Project/Area Number |
24651113
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Nanostructural science
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| Research Institution | Kanazawa University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
OHASHI Ryutaro 金沢大学, 理工研究域物質化学系, 助教 (50533577)
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| Co-Investigator(Renkei-kenkyūsha) |
KITTAKA Shigeharu 岡山理科大学, 理学部, 教授 (60068905)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | ナノ構造化学 / 制限空間 / 水 / NMR |
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| Outline of Final Research Achievements |
In the present investigation, the states of the water in the mesoporous materials were analyzed by NMR method in order to obtain new knowledge of the freezing process and the liquid-liquid transition of water in the limited space. For the water in the mesoporous silica MCM-41 with uniform pore size, the gradual transition from high density water to low density water was observed around freezing temperature of water at the outlet of cylindrical pores. The mesoporous silica SBA-16 possesses three- dimensional networks of cylindrical pores and cagelike pores. When the cylindrical pore size is sufficiently small compared to cagelike pore size, the water in the cagelike pores freezes at 232 K before the water in the cylindrical pores freezes. The water at the outlet of cylindrical pores, which exists around the water in the cagelike pore, plays an important role in lowering the freezing temperature of the water in the cagelike pore.
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| Free Research Field |
ナノ構造科学
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