Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
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Biodegradable Polylactic Acid Foams Modified by the Blending of Cellulose Acetate Butyrate

Cellulose Acetate Butyrate를 블렌드하여 개질한 생분해성 Polylactic Acid 발포체

  • Jeong-Hwan Kim (Department of Materials Design Engineering, Kumoh National Institute of Technology) ;
  • Dong-Jin Kim (Department of Materials Design Engineering, Kumoh National Institute of Technology) ;
  • Hyeji Kim (Department of Materials Design Engineering, Kumoh National Institute of Technology) ;
  • Minsu Park (Department of Materials Design Engineering, Kumoh National Institute of Technology) ;
  • Ji-Yun Baek (Department of Materials Design Engineering, Kumoh National Institute of Technology) ;
  • Jinho Jang (Department of Materials Design Engineering, Kumoh National Institute of Technology)
  • 김정환 (금오공과대학교 소재디자인공학과) ;
  • 김동진 (금오공과대학교 소재디자인공학과) ;
  • 김혜지 (금오공과대학교 소재디자인공학과) ;
  • 박민수 (금오공과대학교 소재디자인공학과) ;
  • 백지윤 (금오공과대학교 소재디자인공학과) ;
  • 장진호 (금오공과대학교 소재디자인공학과)
  • Received : 2023.08.16
  • Accepted : 2023.10.18
  • Published : 2023.10.31
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Abstract

The expanded polystyrene foams, often termed Styrofoam, are not biodegradable and susceptible to photo-oxidation in the ocean contributing to microplastic marine debris, resulting in a global ban as a single use plastic. As an eco-friendly polymer foam, Poly(lactic acid) and PLA/cellulose acetate butyrate (CAB) blends were foamed using an twin-screw extruder with azodicarbonamide (ADCA) as a chemical blowing agent. When cellulose acetate butyrate (CAB) was blended to modify the low melt strength of PLA, the PLA/CAB blend showed outstanding miscibility indicated by the loss of each melting peaks suggesting the amorphous nature of the blends. The foam density of PLA blend decreased from 1.20 g/cm3 to 0.63 g/cm3 with increasing CAB concentration at the adjusted ADCA concentration and extrusion temperature. The CAB blending ratio of 50:50 with 2% ADCA may enhance the foaming capability of PLA through the stabilization of the foam cell structures both by increasing melt viscosity and miscibility, as well as by the higher nonpolar surface energy of CAB compared to PLA.

Keywords

Acknowledgement

이 연구는 금오공과대학교 대학 연구과제비로 지원되었음(2022~2024).

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