Document Detail

Effect of PPG-PEG-PPG on the tocopherol controlled release from films intended for food packaging applications.
MedLine Citation:
PMID:  22846036     Owner:  NLM     Status:  Publisher    
The feasibility of novel controlled release systems for the delivery of active substances from films intended for food packaging was investigated. Being polyolefins highly used for food packaging applications, the reported high retention degree of antioxidants has limited their use for active packaging. Thus, in this study, PP films modified with different chain extenders have been developed to favour and control the release rates of the low molecular weight antioxidant tocopherol. The use of different chain extenders as polymer modifiers (PE-PEG Mw: 575 and PPG-PEG-PPG Mw: 2000) has caused significant changes in tocopherol specific release properties. HPLC coupled to PDA-FL and PDA-MS were used to test tocopherol and chain extender migration, respectively. The release of tocopherol from the prepared films with two chain extenders into two food simulants was studied. Different temperatures and storage times were also tested. Varying the structural features of the films with the incorporation of different levels of PPG-PEG-PPG, the release of tocopherol (food packaging additive) into different ethanolic simulants could be clearly controlled. The effect of the temperature and storage time on the release of the antioxidant has been outstanding as their values increased. The migration of the chain extender, also tested, was well below the limits set by European legislation.
María Del Mar Castro López; Sonia Dopico-García; A Ares Prenas; J M López Vilariño; Maria Victoria González Rodriguez
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-7-30
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  -     ISSN:  1520-5118     ISO Abbreviation:  -     Publication Date:  2012 Jul 
Date Detail:
Created Date:  2012-7-31     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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