Document Detail

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.
MedLine Citation:
PMID:  20672204     Owner:  NLM     Status:  MEDLINE    
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.
J L Koontz; R D Moffitt; J E Marcy; S F O'Keefe; S E Duncan; T E Long
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment     Volume:  27     ISSN:  1944-0057     ISO Abbreviation:  Food Addit Contam Part A Chem Anal Control Expo Risk Assess     Publication Date:  2010 Nov 
Date Detail:
Created Date:  2010-09-13     Completed Date:  2011-01-27     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101485040     Medline TA:  Food Addit Contam Part A Chem Anal Control Expo Risk Assess     Country:  England    
Other Details:
Languages:  eng     Pagination:  1598-607     Citation Subset:  IM    
Department of Food Science and Technology, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA.
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MeSH Terms
Antioxidants / analysis,  chemistry*
Ethanol / chemistry
Food Packaging / methods*
Food Preservation / methods
Models, Theoretical
Organometallic Compounds / chemistry
Peroxides / analysis
Plant Oils / chemistry*
Polyethylene / chemistry*
Quercetin / analysis,  chemistry*
alpha-Tocopherol / analysis,  chemistry*
beta-Cyclodextrins / chemistry*
Reg. No./Substance:
0/Antioxidants; 0/Organometallic Compounds; 0/Peroxides; 0/Plant Oils; 0/beta-Cyclodextrins; 0/metallocene; 117-39-5/Quercetin; 59-02-9/alpha-Tocopherol; 64-17-5/Ethanol; 7585-39-9/betadex; 8001-31-8/coconut oil; 9002-88-4/Polyethylene

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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