2012年8月
Synthesis and thermoreversible gelation of diblock methylcellulose analogues via Huisgen 1,3-dipolar cycloaddition
CELLULOSE
- ,
- ,
- 巻
- 19
- 号
- 4
- 開始ページ
- 1315
- 終了ページ
- 1326
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1007/s10570-012-9703-7
- 出版者・発行元
- SPRINGER
A novel synthetic method to link acetylated cellulose derivatives with methylated cellulose derivatives via Huisgen 1,3-dipolar cycloaddition was developed to produce 1,2,3-triazole-linked diblock copolymers consisting of hydrophilic cellobiose or low-molecular-weight cellulose and a hydrophobic 2,3,6-tri-O-methyl-cellulose. Huisgen 1,3-dipolar cycloaddition had the advantage over glycosylation reaction of being able to connect a hydrophilic block having higher molecular weight than cellobiose with a hydrophobic 2,3,6-tri-O-methyl-cellulose block. As a consequence, 2.0 wt% aqueous solutions of the 1,2,3-triazole-linked diblock methylcellulose analogues exhibited the thermoreversible gelation in water at around 25 A degrees C as same as that of beta-(1 -> 4)-linked diblock methylcellulose. Differential scanning calorimetry measurements of 2.0 wt% aqueous solutions of the diblock copolymers revealed that an important structural factor for its thermoreversible gelation was not a beta-(1 -> 4)-glycosidic linkage between hydrophilic and hydrophobic blocks of diblock methylcellulose, but a sequence of anhydro 2,3,6-tri-O-methyl-glucopyranosyl units and that of unmodified glucopyranosyl ones.
- リンク情報
- ID情報
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- DOI : 10.1007/s10570-012-9703-7
- ISSN : 0969-0239
- eISSN : 1572-882X
- Web of Science ID : WOS:000305236900024