Influence of silk fibroin content on cellulose blend film using LiBr Solution

Jiwook Yang, Gu Joong Kwon, Kyojung Hwang, Jihui Byeon, Gajanan S. Ghodake, Surendra K. Shinde, Seunghun Hyun, Dae Young Kim

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Cellulose-silk fibroin (CSF) films were prepared by blending cellulose and silk fibroin (SF) in different ratios (10:0, 10:3, 10:6, 10:9, and 10:12 wt%) in 60% LiBr aqueous solution. All of the blend films were transparent, and their coloration gradually increased with increasing SF content. Interestingly, cross-sections of all of the tested films were observed by scanning electron microscopy and exhibited similar morphologies. The silk II structure was not well developed in the CSF; however, regenerated SF affected the crystal structure of the cellulose and formed intermolecular hydrogen bonds with cellulose. EDS mapping showed that cellulose and silk in the film were distributed uniformly. The mechanical properties of the dry-state film was greatly improved with the addition of an appropriate amount of SF. In contrast with the dry-state films, the films in the wet state exhibited smaller tensile strengths and E-modulus as SF content increased; however, the elongation values were higher than those in the dry-state films.

Original languageEnglish
Pages (from-to)2459-2470
Number of pages12
Issue number2
Publication statusPublished - 2020 May 1

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. NRF-2019R1A2C1007661).

Publisher Copyright:
© 2020, North Carolina State University.


  • Blend
  • Cellulose
  • Film
  • Silk fibroin

ASJC Scopus subject areas

  • Environmental Engineering
  • Bioengineering
  • Waste Management and Disposal


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