Innovative application of metal-organic frameworks for encapsulation and controlled release of allyl isothiocyanate

Elham Lashkari, Hao Wang, Linshu Liu, Jing Li, Kit Yam

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

This research investigated the technical feasibility of metal-organic frameworks (MOFs) as novel delivery systems for encapsulation and controlled release of volatile allyl isothiocyanate (AITC) molecules. We hypothesized that water vapor molecules could act as an external stimulus to trigger the release of AITC molecules encapsulated in MOFs. To test this hypothesis, three MOFs—HKUST-1, MOF-74(Zn), and RPM6-Zn—were selected based on their structural properties and AITC molecular characteristics. Results from adsorption-desorption and GC headspace analyses showed that these MOFs could encapsulate and retain AITC molecules within their pores under low (30–35%) relative humidity (RH) conditions. In contrast, the release of AITC molecules from all these MOFs was triggered under high RH (95–100%) conditions. These findings along with results from SEM, TEM, and XRPD studies support our hypothesis that water vapors could trigger the AITC release from these MOFs, indicating that development of the AITC-MOFs delivering system is technically feasible.

Original languageEnglish
Pages (from-to)926-935
Number of pages10
JournalFood Chemistry
Volume221
DOIs
Publication statusPublished - Apr 15 2017

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Keywords

  • Allyl isothiocyanate
  • Antimicrobial food packaging
  • Controlled release
  • Encapsulation
  • Metal-organic framework (MOF)
  • Moisture-trigger
  • Natural food preservative

ASJC Scopus subject areas

  • Analytical Chemistry
  • Food Science

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