KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY (한국포장학회지)

Korea Society of Packaging Science and Technology (한국포장학회)
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Preparation and Characterization of Low Density Polyethylene (LDPE) and Flower-like Zinc Oxide (FZnO) Composite Films

저밀도폴리에틸렌(LDPE)/꽃 모양 산화아연(FZnO) 복합필름의 제조 및 물성 분석

  • Kim, Insoo (Department of Packaging, Yonsei University) ;
  • Lee, Hojun (Department of Packaging, Yonsei University) ;
  • Kim, Dowan (Department of Packaging, Yonsei University) ;
  • Seo, Jongchul (Department of Packaging, Yonsei University)
  • 김인수 (연세대학교 과학기술대학 패키징학과) ;
  • 이호준 (연세대학교 과학기술대학 패키징학과) ;
  • 김도완 (연세대학교 과학기술대학 패키징학과) ;
  • 서종철 (연세대학교 과학기술대학 패키징학과)
  • Received : 2016.11.29
  • Accepted : 2016.12.26
  • Published : 2016.12.31
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Abstract

Flower-like zinc oxide (FZnO) was successfully synthesized via a sonochemical process. The chemical structure, morphology, and antimicrobial properties of as- prepared FZnO were investigated. Additionally, pure LDPE and five different LDPE/FZnO composite films were prepared with different FZnO content by using a twin screw extruder. According to the FTIR and SEM analyses, there exists weak interfacial interaction between LDPE and FZnO. Compared with pure LDPE, the LDPE/FZnO composite films showed UV barrier and enhanced antimicrobial activity against Escherichia coli (E. coli) as a Gram-negative micro-organism and Staphylococcus aureus (S. aureus) as a Gram-positive micro-organism. To enhance the interfacial interaction and good dispersion of FZnO into the LDPE matrix, and resultantly to such as UV barrier and antimicrobial properties of LDPE/FZnO composite films as the packaging materials, further efforts are required.

본 연구에서는 초음파합성법을 이용하여 항균성과 자외선 차단성이 있는 삼차원 꽃 모양의 구조를 가진 FZnO를 제조하였다. 제조한 FZnO 분말은 E. coli와 S. aureus에 대해 99.9%와 97.8%의 항균력을 나타내었다. 제조한 LDPE/FZnO 복합필름에 대한 FTIR 분석과 SEM 분석결과 LDPE/FZnO 복합필름이 성공적으로 만들어졌지만, LDPE 매트릭스와 FZnO 분말과의 상호작용은 약한 것으로 확인되었다. FZnO 함량이 증가할수록 자외선 차단성이 증가하는 것을 확인할 수 있었다. 또한, FZnO함량이 증가할수록 E. coli와 S. aureus에 대한 항균성이 증가하는 것을 확인하였다. 하지만, 복합필름 내 물성 극대화 및 포장소재로 적용을 위해서는 FZnO 분말과 고분자와의 혼화성 향상에 대한 추가적인 연구가 필요하다는 것을 확인하였다.

Keywords

References

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