Abstract
Highly ordered cellulose nanofibers/silk fibroin nanohybrid (CSN) honeycomb materials with multi-scale hierarchical architectures are successfully prepared from CSN hydrogel precursors using unidirectional freeze-drying technique. Cellulose nanofibers have an outstanding highly ordered honeycomb structure-directing function in composite hydrogel. However, silk fibroin does not have such function. Therefore, the properties of the CSN sponges can be effectively adjusted by simple changing the ratio of cellulose nanofibers to silk fibroin. When the content of silk fibroin reaches 50%, the CSN-50 sponge exhibits a nearly perfect highly ordered honeycomb structure with multi-scale hierarchical architectures. And the Brunauer–Emmett–Teller specific surface area is about 120 m2 g−1.
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Acknowledgments
Financial support was kindly supplied by grants from National Natural Science Foundation of China (Nos. 21501154, 21601162, and 21471135), Important Research Project at the University of Henan Province (16A430031), the Project of Henan Province Science and Technology Department (152102210352), Doctoral Research Foundation of Zhengzhou University of Light Industry (2014BSJJ059 and 2014BSJJ060), and Foundation of Zhengzhou University of Light Industry (2015XJJZ030 and 2015XJJY004).
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Gao, K., Guo, Y., Niu, Q. et al. Cellulose nanofibers/silk fibroin nanohybrid sponges with highly ordered and multi-scale hierarchical honeycomb structure. Cellulose 25, 429–437 (2018). https://doi.org/10.1007/s10570-017-1545-x
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DOI: https://doi.org/10.1007/s10570-017-1545-x