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Multifold curdlan gel formation by dialysis into aqueous solutions of metal salts

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Abstract

We have found that the dialysis of curdlan dissolved in alkaline solution into aqueous solutions of metal salts yielded multifold gel structures. Aqueous sodium chloride and potassium chloride as well as pure water induced isotropic gels. Aqueous calcium salts induced liquid crystalline gel with refractive index gradient/amorphous gel alternative structure. Aqueous salts of trivalent aluminum and ferric cations induced a rigid liquid crystalline gel, which shrank above a threshold concentration of each salt. On the other hand, Liesegang ring-like pattern was observed with aqueous solutions of mixed salts of calcium chloride and magnesium chloride. The patterns have been classified to discuss the mechanism of forming the variety of structures.

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Acknowledgements

This work was partly supported by Grant-in-Aid for Science Research from The Ministry of Education, Culture, Sports, Science and Technology in Japan (Grant # 16540366).

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Authors and Affiliations

  1. Department of Biological and Chemical Engineering, Faculty of Engineering, Gunma University, 376-8515, Kiryu, Gunma, Japan

    Masumi Sato, Masahiro Nobe & Toshiaki Dobashi

  2. Department of Physics, Faculty of Enginnering, Gunma University, 376-8515, Kiryu, Gunma, Japan

    Takao Yamamoto

  3. Department of Food and Nutrition, Faculty of Human Life Sciences, Senri Kinran University, 563-0873, Suita, Osaka, Japan

    Akira Konno

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  1. Masumi Sato
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  2. Masahiro Nobe
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  3. Toshiaki Dobashi
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  4. Takao Yamamoto
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  5. Akira Konno
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Correspondence to Toshiaki Dobashi.

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Sato, M., Nobe, M., Dobashi, T. et al. Multifold curdlan gel formation by dialysis into aqueous solutions of metal salts. Colloid Polym Sci 284, 293–300 (2005). https://doi.org/10.1007/s00396-005-1375-5

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  • DOI: https://doi.org/10.1007/s00396-005-1375-5

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