Cellulose nanofiber-reinforced silk fibroin composite film with high transparency |
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Authors: | Se Youn Cho Min Eui Lee Youngeun Choi Hyoung-Joon Jin |
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Affiliation: | 1. Department of Polymer Science and Engineering, Inha University, Incheon, 402-751, Korea
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Abstract: | We successfully prepared optically transparent silk fibroin-cellulose nanofiber (CN) composite films from solvent casting using a stable CN suspension in an aqueous silk fibroin solution. The transmittance of the silk fibroin composite films was observed by a UV-visible spectrophotometer. The secondary structural change of the silk fibroin caused by the incorporation of CNs was characterized using Fourier transform infrared spectroscopy. A tensile test was carried out to investigate the mechanical properties. The results showed that the composite film exhibited visible-light transmittance of 75 %, and its mechanical strength and Young’s modulus were increased by 44 % and 35 %, respectively, as compared to a neat silk fibroin film. |
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