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Cellulose

, Volume 25, Issue 4, pp 2217–2234 | Cite as

Dependence of dissolution, dispersion, and aggregation characteristics of cationic polysaccharides made from euglenoid β-1,3-glucan on degree of substitution

  • Motonari Shibakami
  • Tadashi Nemoto
  • Mitsugu Sohma
Original Paper
  • 130 Downloads

Abstract

Dissolution, dispersion, and aggregation characteristics of 2-hydroxy-3-trimethylammoniopropyl polysaccharides made from β-1,3-glucan extracted from Euglena (referred to as paramylon) differing in the degree of substitution (DS) of a 2-hydroxy-3-trimethylammoniopropyl group were examined. Freeze-dried solids made from cationic paramylon derivatives with a DS ranging from 0.07 to 0.16 spontaneously formed crystalline nanofibers upon being mechanically stirred in water. Derivatives with a DS greater than 0.31 lacked similar fiber formability. Nevertheless, they formed a distinctly outlined, transparent thin film featuring a nanometer-level flat surface using an aqueous solution casting method in which water is gradually removed from the aqueous homogeneous solution and a methanolic solution casting method featuring rapid removal of methanol from a heterogeneous solution. Those that had a DS less than 0.06 lacked solution solubility and dispersibility; they formed a thin film from a heterogeneous solution. These results demonstrate that cationic paramylon derivatives can be used as a constituent of well-organized polymeric materials.

Keywords

β-1,3-Glucan Paramylon Euglena Cationization Nanofiber Film 

Notes

Acknowledgments

The authors are grateful to KOBELCO Eco-Solutions Co. Ltd. for providing the paramylon. They are also grateful to Dr. Kijima (AIST) for technical assistance in obtaining the WAXD data.

Supplementary material

10570_2018_1740_MOESM1_ESM.pptx (590 kb)
Supplementary material 1 (PPTX 590 kb)

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© Springer Science+Business Media B.V., part of Springer Nature 2018

Authors and Affiliations

  1. 1.Biomedical Research InstituteNational Institute of Advanced Industrial Science and Technology (AIST)TsukubaJapan
  2. 2.Advanced Coating Technology Research CenterNational Institute of Advanced Industrial Science and Technology (AIST)TsukubaJapan

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