International Journal of Industrial Entomology and Biomaterials

Korean Society of Sericultural Science (한국잠사학회)
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Effect of biofibers addition on the structure and properties of soy protein composite films

  • Ye Eun Kim (Department of Biofibers and Biomaterials Science, Kyungpook National University) ;
  • Su Jin Kim (Bio-Convergence Research Center, Korea Textile Machinery Convergence Research Institute) ;
  • Yong-Il Chung (Bio-Convergence Research Center, Korea Textile Machinery Convergence Research Institute) ;
  • Chae Hwa, Kim (Advanced Textile R&D Department, Korea Institute of Industrial Technology) ;
  • Tae Hee Kim (Advanced Textile R&D Department, Korea Institute of Industrial Technology) ;
  • In Chul Um (Department of Biofibers and Biomaterials Science, Kyungpook National University)
  • Received : 2023.12.27
  • Accepted : 2024.01.03
  • Published : 2024.03.31
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Abstract

Soy protein isolate (SPI) has garnered researchers' attention due to its abundance, costeffectiveness, excellent biocompatibility, hemo-compatibility, and biodegradability. However, SPI faces limitations in application due to poor processability and weak mechanical strength. Substantial efforts have been made to address these challenges. In this preliminary study, glycerol and biofibers were added to SPI to improve the mechanical properties and film forming, and glyoxal was employed to crosslink SPI molecules. The microstructure and mechanical properties of the resulting SPI/composite films were evaluated. A 15% addition of glycerol proved sufficient for good film formation. Among the biofibers, short SF microfibers were the most effective in enhancing breaking strength, while TEMPO-oxidized CNF (cellulose nanofiber) excelled among CNFs. Crosslinking with glyoxal significantly enhanced the mechanical properties, with the type of biofiber minimally affecting the mechanical properties of the crosslinked SPI composite films.

Keywords

Acknowledgement

This study was supported by the National Research Foundation of Korea Grant funded by the Korean government (Ministry of Science and ICT) (No. 2021R1A2C1006921).

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