Encapsulation-release property of amphiphilic hyperbranched d-glucan as a unimolecular reverse micelle
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概要
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The synthesis of a novel unimolecular reverse micelle, the hyperbranched d-glucan carbamate (3), was accomplished through the carbamation reaction of the hyperbranched d-glucan (1) with the N-carbonyl l-leucine ethyl ester (2) in pyridine at 100 °C. Polymer 3 was soluble in a large variety of organic solvents, such as methanol, acetone, chloroform, and ethyl acetate, and insoluble in water, which remarkably differed from the solubility of 1. The degree of carbamate substitution (DS) for 3 was controlled by the feed rate of 2, and the DS values were in the range of 46.0–93.7%. Polymer 3 possessed the encapsulation ability for water-soluble molecules, such as rose bengal, thymol blue, and alizarin yellow in chloroform, and the encapsulation ability depended on the hydrophilicity of 3 and the molecular size of the dye. The rose bengal (RB) encapsulated polymer (RB/3) showed a slow release from the RB/3 system into water at neutral pH, while the release rate was significantly accelerated by the hydrolysis of the hydrophobic polymer shell under basic conditions.
- Elsevierの論文
- 2007-02-23
著者
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佐藤 敏文
北海道大学大学院工学研究科
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Kakuchi T
Division Of Bioscience Graduate School Of Environmental Earth Science Hokkaido University
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Kakuchi T
Hokkaido Univ. Sapporo Jpn
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佐藤 敏文
Division Of Biotechnology And Macromolecular Chemistry Graduate School Of Engineering Hokkaido Unive
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Haraguchi K
National Inst. Of Advanced Industrial Sci. And Technol. (aist) Sapporo Jpn
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Haraguchi K
Hokkaido National Industrial Research Institute
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Haraguchi Kensaku
Hokkaido National Industrial Research Institute
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佐藤 敏文
北海道大学大学院工学研究科生物機能高分子専攻
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覚知 豊次
Division Of Biotechnology And Macromolecular Chemistry Graduate School Of Engineering Hokkaido Unive
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Satoh Toshifumi
Division Of Biotechnology And Macromolecular Chemistry Graduate School Of Engineering Hokkaido Unive
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Tsuji Masashi
Department Of Nuclear Engineering Graduate School Of Engineering Hokkaido University
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Matsuda Takeshi
Department Of Materials Science Kitami Institute Of Technology
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Narumi Atsushi
Department Of Polymer Science And Engineering Graduate School Of Science And Engineering Yamagata Un
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Takahashi Kenji
Division Of Material Sciences Graduate School Of Natural Science And Technology Kanazawa University
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Kakuchi Toyoji
Division Of Biotechnology And Macromolecular Chemistry Graduate School Of Engineering Hokkaido Unive
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Narumi Atsushi
Department Of Polymer Science And Engineering Graduate School Of Science And Engineering Yamagata Un
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