Miscibility, structural characteristics, and thermal behavior of wet spun regenerated silk fibroin/nylon 6 blend filaments

Jae Sang Ko, Kee Hoon Lee, Do Gyu Bae, In Chul Um

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

In this study, the regenerated silk fibroin (SF)/nylon 6 blend filaments were fabricated by the wet spinning and miscibility, structural characteristics, and thermal behavior of blend filaments were elucidated. The XRD results implied that the amount of crystalline region of each polymer did not change linearly with the blend ratio suggesting that there are some changes in the miscibility depending on the mixing ratio. The SEM observation revealed that the miscibility of blend decreased with an increase of nylon 6 resulting in a severe phase separation in 50/50 SF/nylon 6 filament. The miscibility governed the thermal behavior of blend filaments. The melting point of nylon 6 remained constant until 50 % nylon 6 content, whereas the melting point depression appeared in 30 % nylon 6 implying miscibility. Interestingly, the thermal decomposition of the nylon 6 component was accelerated by the presence of SF and the acceleration action of SF became stronger as the miscibility increased.

Original languageEnglish
Pages (from-to)14-20
Number of pages7
JournalFibers and Polymers
Volume11
Issue number1
DOIs
StatePublished - Mar 2010

Keywords

  • Miscibility
  • Nylon 6
  • Silk fibroin
  • Structural characteristics
  • Thermal behavior
  • Wet spinning

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