A unimolecular nanocapsule : Encapsulation property of amphiphilic polymer based on hyperbranched polythreitol
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概要
- 論文の詳細を見る
Hyperbranched polythreitol (1) with different molecular weights (Mw,SLS: 1.18 × 10 4 and 4.79 × 10 4) was reacted with trityl chloride in DMF to afford a novel amphiphilic polymer (2) consisting of 1 as the hydrophilic core and the trityl groups as the hydrophobic shell. Compound 2 was tested for its ability to act as a unimolecular nanocapsule toward the water-soluble dye, rose bengal (RB). Their encapsulation and release properties were also evaluated by comparison with the degree of substitution (DS) of the trityl groups, i.e., the hydrophobic shell density. The polymers were found to have very good unimolecular nanocapsule characteristics even at extremely low concentrations. The average number of RBs per polymer molecule depended on the hydrophilic core size and the hydrophobic shell density. The increasing DS value led to a decrease in the encapsulated amount due to the decrease in the hydrophilic core space, while the low DS value (less than ca. 20 mol%) led to a destabilization as a unimolecular nanocapsule and a lower encapsulation ability. In particular, 2 with ca. 23% DS value showed an efficient encapsulation. Based on a release test of the RB-loaded unimolecular nanocapsules, the polymers showed a high RB-holding ability in water.
- Elsevier Ltd.の論文
- 2007-07-27
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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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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Matsuda Takeshi
Division Of Molecular Chemistry Graduate School Of Engineering Hokkaido University
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