Controlled release of α-tocopherol, quercetin, and their cyclodextrin inclusion complexes from linear low-density polyethylene (LLDPE) films into a coconut oil model food system

J. L. Koontz, R. D. Moffitt, J. E. Marcy, S. F. O'Keefe, S. E. Duncan, Timothy Edward Long

Research output: Contribution to journalArticle

39 Citations (Scopus)


Polymer additive migration into a food product is dependent upon numerous factors including the original concentration of the additive in the polymer, its solubility in the food, its diffusion coefficient in the polymer, its partition coefficient between the polymer and food, temperature, and time. The limited solubility of quercetin in linear low-density polyethylene (LLDPE) did not allow release from the film due to phase segregation of the quercetin in the bulk polymer. Increasing the molecular weight of α-tocopherol by β-cyclodextrin inclusion complexation can greatly reduce its diffusion coefficient in LLDPE. Ziegler-Natta and metallocene LLDPE contain different crystalline structure morphologies and diffusion path networking arrangements that allow for differences in additive release rates. Effective controlled-release packaging should combine β-cyclodextrin complexation of additives and polymer morphology control to target delivery of an optimal antioxidant concentration to achieve prolonged activity, resulting in extended shelf life foods.

Original languageEnglish
Pages (from-to)1598-1607
Number of pages10
JournalFood Additives and Contaminants - Part A Chemistry, Analysis, Control, Exposure and Risk Assessment
Issue number11
Publication statusPublished - 2010 Sep 21
Externally publishedYes



  • Active
  • Antioxidants
  • Diffusion
  • High-performance liquid chromatography (HPLC)
  • Migration
  • Oils and fats
  • Packaging

ASJC Scopus subject areas

  • Food Science
  • Health, Toxicology and Mutagenesis
  • Public Health, Environmental and Occupational Health
  • Toxicology
  • Chemistry(all)

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