Towards a unified understanding of water's anomalies and glass-forming ability based on a quantitative observation of medium-range order in liquids.

基于对液体中中程有序的定量观察，统一理解水的异常和玻璃形成能力。

• 批准号: 23840011
• 负责人: KOBAYASHI Mika
• 金额: $ 2.08万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Research Activity Start-up
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011-08-24 至 2013-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-23840011/
• 关键词: 物性実験; 液体論; 水; 電解質水溶液; ガラス転移; エイジング; 熱測定; 光散乱; 水和; 電解質溶液; 蛍光観察

Water is one of the fundamental substances on the earth and exhibits anomalous behavior such as the volume increase upon crystallization. In addition, water is known to be an exceptionally poor glass former. However, adding salt and applying pressure affect the tetrahedral locally favored structure of water molecules and the anomalies of water are weaken or disappear. These facts indicate that the medium range local ordering could be the key to understand the mechanism of the glass formation and the mystery of water. In this project, we investigated the aging of glasses and experimentally found that the aging kinetics at different annealing temperatures can be scaled on a single curve. There is a significant enthalpy decrease during aging, suggesting that the local ordering would be a key process of aging.

水是地球上的基本物质之一，表现出结晶后体积增大等反常行为。此外，众所周知，水是一种特别差的玻璃成型剂。而加盐和加压影响水分子的四面体局部择优结构，水的反常现象减弱或消失。这些事实表明，中程局域有序可能是理解玻璃形成机制和水的奥秘的关键。在这个项目中，我们研究了玻璃的老化，实验发现，不同温度下的老化动力学可以在一条曲线上标度。在老化过程中有一个显著的热焓降低，这表明局部有序化将是老化的关键过程。

项目成果

Liquid-glass transition and aging of a LiCl/water mixture

LiCl/水混合物的液体玻璃化转变和老化

• 作者: T.Shiono;R.Harada;Z.Cai;Y.Nakayama;Mika Kobayashi
• 通讯作者: Mika Kobayashi

亜リン酸トリフェニルにおける液体・液体転移の検証

亚磷酸三苯酯液-液转变的验证

• 发表时间: 2014
• 作者: 小林美加;田中肇
• 通讯作者: 田中肇

熱測定によるガラス転移とエイジング挙動の研究

通过热测量研究玻璃化转变和老化行为

• 作者: 本林健太;金有洙;上羽弘;川合眞紀;小林修;Y.Iwasa;小林美加
• 通讯作者: 小林美加

Relationship between the Phase Diagram, the Glass-Forming Ability, and the Fragility of a Water/Salt Mixture

• DOI: 10.1021/jp203855c
• 发表时间: 2011-12-08
• 期刊: JOURNAL OF PHYSICAL CHEMISTRY B
• 影响因子: 3.3
• 作者: Kobayashi, Mika;Tanaka, Hajime
• 通讯作者: Tanaka, Hajime

融解挙動からみた液体・液体転移

从熔化行为看出液/液转变

• 发表时间: 2013
• 作者: 小林美加;田中肇
• 通讯作者: 田中肇