Textile Coloration and Finishing (한국염색가공학회지)

The Korean Society of Dyers and Finishers (한국염색가공학회)
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Color Stability of the Bioplastic containing Sorghum Extract Chelated by Fe(II) and Cu(II)

Fe(II)와 Cu(II)에 의해 킬레이트화 된 수수추출물 함유 바이오플라스틱의 색상 안정성

  • Lee, Ga Hyun (Nano and Bio Research Division, Daegu Gyeonbuk Institute of Science and Technology) ;
  • Lee, Sung June (Nano and Bio Research Division, Daegu Gyeonbuk Institute of Science and Technology) ;
  • Jeong, Sang Won (Nano and Bio Research Division, Daegu Gyeonbuk Institute of Science and Technology) ;
  • Kim, Hyun-Chul (Nano and Bio Research Division, Daegu Gyeonbuk Institute of Science and Technology) ;
  • Choi, Jin Hyun (Department of Bio-fibers and Materials Science, Kyungpook National University) ;
  • Bae, Do Gyu (Department of Bio-fibers and Materials Science, Kyungpook National University) ;
  • Han, Sang Ik (Department of Functional Crop, National Institute of Crop Science) ;
  • Lee, Se Geun (Nano and Bio Research Division, Daegu Gyeonbuk Institute of Science and Technology)
  • 이가현 (대구경북과학기술원 나노바이오연구부) ;
  • 이성준 (대구경북과학기술원 나노바이오연구부) ;
  • 정상원 (대구경북과학기술원 나노바이오연구부) ;
  • 김현철 (대구경북과학기술원 나노바이오연구부) ;
  • 최진현 (경북대학교 바이오섬유소재학과) ;
  • 배도규 (경북대학교 바이오섬유소재학과) ;
  • 한상익 (국립식량과학원 기능성작물부) ;
  • 이세근 (대구경북과학기술원 나노바이오연구부)
  • Received : 2014.08.25
  • Accepted : 2014.12.19
  • Published : 2015.03.27
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Abstract

To improve the color stability of the bioplastic containing sorghum extract, sorghum extract was chelated by a metal ion. The chelating activity was quantitatively evaluated under the various conditions. Chelation of sorghum extract by Cu(II) was determined by reaction with pyrocatechol violet, whereas Fe(II) chelation was investigated by forming complexes with ferrozine. Chelation of sorghum extract was increased rapidly with increasing concentrations of metal salt and sorghum extract. At a 0.1g/L metal salt addition level, the chelating activity of Fe(II) and Cu(II) were 66.7% and 54.2%, respectively. According to the chelation pH conditions, the sorghum extract was chelated almost 100% by Fe(II) above the pH 6.5. It was confirmed that Fe(II) was a strong chelator of sorghum extract than Cu(II). The sorghum extract chelated with metal salt exhibit higher thermal stability. The bioplastic containing chelated sorghum extract showed relatively less color change than the control.

Keywords

References

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