KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY (한국포장학회지)

Korea Society of Packaging Science and Technology (한국포장학회)
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Preparation and Characterization of ClO2 Self-Releasing Smart Sachet

이산화염소 자체 방출 스마트 샤쉐의 제조 및 특성 연구

  • Junseok Lee (Department of Packaging & Logistics, Yonsei University) ;
  • Hojun Shin (Department of Packaging & Logistics, Yonsei University) ;
  • Sadeghi Kambiz (Department of Packaging & Logistics, Yonsei University) ;
  • Jongchul Seo (Department of Packaging & Logistics, Yonsei University)
  • 이준석 (연세대학교 패키징 및 물류학과) ;
  • 신호준 (연세대학교 패키징 및 물류학과) ;
  • 사데기 캄비즈 (연세대학교 패키징 및 물류학과) ;
  • 서종철 (연세대학교 패키징 및 물류학과)
  • Received : 2022.11.11
  • Accepted : 2023.01.28
  • Published : 2023.04.30
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Abstract

Chlorine dioxide (ClO2) is widely used for post-harvest sterilization treatment. However, there are limitations in the retail application of ClO2 due to difficulties in handling, expensive facilities, and safety concerns. Therefore, it is necessary to develop a ClO2 technology that can be easily applied and continuously released for a long period. In this study, a series of ClO2 self-releasing sachets were developed. First, poly(ether-block-amide) (PEBAX) and polyethylene-glycol (PEG) composite films containing different ratios of citric acid (CA) were prepared using the solution casting method. The as-prepared PEBAX/PEG-CA composite films were evaluated using FT-IR, DSC, and TGA to confirm chemical structure and thermal properties. Subsequently, PEBAX/PEG-CA composite films were designed in the form of a sachet and NaClO2 powder was transferred into the sachet to achieve a ClO2 self-releasing system. The ClO2-releasing behavior of the sachet was investigated by measuring the release amount of the gas using UV-vis. The release amount of ClO2 increased with increasing CA contents owing to the existence of higher protons (trigger) in the polymer matrix. Further, ClO2 gas was released for a longer time. Therefore, the as-prepared smart sachet can be tuned according to applications and packaging sizes to serve an optimal sterilization effect.

본 연구에서는 PEBAX/PEG-CA 복합필름을 제조하여 내부에 아염소산나트륨 분말을 포함한 스마트 샤쉐를 제작하였다. 또한, TGA, DSC, FT-IR, UV-vis를 통해 샤쉐의 화학적 구조 및 열적 특성과 더불어 샤쉐 적용성 평가를 위해 이산화염소 가스 방출량을 측정하였다. PEBAX/PEG-CA 복합필름은 친수성 및 혼화성을 바탕으로 매트릭스 내에서 강한 화학적 상호작용을 하는 것을 확인하였다. 특히, 구연산의 함량이 높아질수록 복합필름의 열 안정성이 저하되었지만, 저온 및 상온의 유통환경과 필름 제작 온도 범위(<℃)에서 열분해가 발생하지 않았으므로 샤쉐의 제작 및 적용이 가능할 것으로 사료된다. 본 연구의 핵심인 이산화염소 가스 방출량 측정에서는 스마트 샤쉐가 측정 기간인 14일 동안 내부 아염소산나트륨의 이산화염소 가스 방출을 지속적으로 활성화했으며, 산층의 구연산 함량이 높아짐에 따라 방출량이 증가하는 것을 확인하였다. 따라서, 스마트 샤쉐 내부의 아염소산나트륨 함량 및 산층의 구연산 함량 조절 또는 포장크기의 변경 등을 통해 이산화염소 방출량을 효과적으로 조절할 수 있으며, 이는 별도의 설비 및 고가의 장비 없이도 살균 효과를 연장시키는 이점이 있다. 위 실험 결과에 따라 제품 특성 및 포장 용적에 따라 스마트 샤쉐의 응용 적용이 가능할 것으로 판단된다. 하지만, 확실한 소비자 안정성 확보와 스마트 샤쉐의 적용 확장성을 확인하기 위해 항균성 및 저장성 측면에서 향후 연구가 필요하다.

Keywords

Acknowledgement

본 결과는 농림축산식품부의 재원으로 농림수산식품기술기획평가원의 고부가가치식품기술개발 사업의 지원을 받아 수행되었음 (과제번호 321048041HD030)

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