Transaction : Critical Dissolution Ionic Strength of Aqueous Solution of Chitosan Hydrochloride Salt
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- Tanaka Kentaro
- Institute for Chemical Research, Kyoto University
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- Nishida Koji
- Institute for Chemical Research, Kyoto University
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- J. Gabrys Barbara
- Department of Materials, University of Oxford
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- J. Lawrence Margaret
- Department of Pharmacy, King's College London
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- Kanaya Toshiji
- Institute for Chemical Research, Kyoto University
書誌事項
- タイトル別名
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- Critical Dissolution Ionic Strength of Aqueous Solution of Chitosan Hydrochloride Salt
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抄録
The formation of aggregates of chitosan hydrochloride in aqueous solution, with and without added salt (i.e. NaCl), and the dissolution thereof have been studied using wide-dynamical range light transmittance measurements. The concentrations of chitosan and NaCl examined were 4 to 20 g/L and 0 to 2 mol/L, respectively. A large hysteresis loop was found for the formation of aggregates during cooling and the dissolution thereof during heating. In spite of the existence of the hysteresis, and regardless of the precise aggregation state and heating rate, the temperature at which the aggregates dissolved (namely the dissolution temperature) was uniquely determined for any given concentration of chitosan and NaCl. Further a critical dissolution ionic strength, below which no aggregation was detected, was established from the variation of dissolution temperature with ionic strength. The value of the Debye screening length, calculated at the critical dissolution ionic strength, corresponds fairly well to the size of the monomeric units comprising the chitosan chain. We therefore conclude that the aggregates of the chitosan are formed when electrostatic repulsive interactions between chitosan polyions are screened out allowing non-electrostatic attractive interactions to dominate.
収録刊行物
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- 繊維学会誌
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繊維学会誌 70 (9), 225-231, 2014
社団法人 繊維学会
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詳細情報 詳細情報について
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- CRID
- 1390001204895005056
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- NII論文ID
- 130004687325
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- NII書誌ID
- AN00131651
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- ISSN
- 18842259
- 00379875
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- NDL書誌ID
- 025769867
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可