書誌事項
- タイトル別名
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- Colloid Science in Supercritical Fluid
- チョウリンカイ リュウタイ チュウ ニ オケル コロイド カガク
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抄録
Recent progress in our study on the behaviors of colloids in hot and compressed water is described. Dynamic light scattering measurements revealed that model colloids, which remain dispersed stably in water at ambient conditions, flocculate rapidly upon hrating under pressure. In order to obtain further insights into the colloidal dispersions at such extreme conditions, an optical microscope system equipped with a high-temperature and -pressure sample chamber was developed. Diffusion coeffcient of polystyrene latex (d＝2.092μm) that undergose Brownian motion near a quartz surface was measured successfully in water at temperatures between 298K and 573K at constant pressure of 24.6 MPa, and abalyzed in terms of a large temprature dependent change of the density of water. Our experomental setups allow performing the measurements even in supercritical water (Tc=647 K, Pc=22.1 MPa). It seems lilely that intense density fluctuation and anomalies of physical properties such as heat capacity and thermal expansion coefficient near the critical point affect the colloidal behaviors. Future sirections of the work in relation to the critical phenomena and possible applications of the experiments under microgravity are discussed.
収録刊行物
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- 日本マイクログラビティ応用学会誌
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日本マイクログラビティ応用学会誌 23 (3), 145-, 2006-07-31
日本マイクログラビティ応用学会
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詳細情報 詳細情報について
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- CRID
- 1391975831237546112
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- NII論文ID
- 10018210156
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- NII書誌ID
- AN10537663
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- NDL書誌ID
- 8057791
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- ISSN
- 09153616
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可
