Abstract
Six types of CNCs with different sizes were prepared from tunicins by sulfuric acid hydrolysis and subsequent sonication in water. The size distributions of CNCs were comprehensively evaluated by turbidimetry, small angle X-ray scattering, and microscopy to predict their intrinsic viscosities. Experimental intrinsic viscosities [η] of the CNC dispersions were evaluated by shear viscosity measurement, and then compared with their theoretical [η] values based on theories for rotational motions of rigid rods. The experimental [η] values for the straight CNCs were in good agreement with their theoretical [η] values, irrespective of the size and distributions. On the other hand, the experimental [η] value of the kinked CNC was higher than the theoretical [η] value, in agreement with a theoretical calculation giving higher intrinsic viscosities for bent fibers.
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Acknowledgments
This research was supported by the Core Research for Evolutional Science and Technology of the Japan Science and Technology Agency and Grants-in-Aid for Scientific Research (Grant Numbers JP 16J05556 and 15H04524) from the Japan Society for the Promotion of Science. We thank the NanoBio-ICMG platform (FR 2607 Grenoble) for granting access to the electron microscopy facility and Okasei Ltd., Onagawa, Japan for supplying tunicate samples.
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Tanaka, R., Kuribayashi, T., Ogawa, Y. et al. Ensemble evaluation of polydisperse nanocellulose dimensions: rheology, electron microscopy, X-ray scattering and turbidimetry. Cellulose 24, 3231–3242 (2017). https://doi.org/10.1007/s10570-017-1334-6
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DOI: https://doi.org/10.1007/s10570-017-1334-6