Document Detail


Effect of high-pressure food processing on the physical properties of synthetic and biopolymer films.
MedLine Citation:
PMID:  19723193     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The effect of high-pressure processing on 2 plastic food packaging films, a biopolymer (PLASiOx/PLA) and a synthetic polymer (PET-AlOx), was studied. Samples in direct contact with olive oil, as a fatty food simulant, and distilled water, as an aqueous simulant, were subjected to a pressure of 500MPa for 15 min at 50 degrees C. The mechanical, thermal, and gas barrier properties of both films were evaluated after the high-pressure processing (HPP) and compared to control samples that have not undergone this treatment. Significant changes in all properties were observed in both films after the HPP treatment and in contact with the food simulants. In both films an induced crystallization was noticed. In the PLASiOx/PLA film the changes were larger when in contact with water that probably acted as a plasticizer. In the PET-AlOx film the changes in properties were attributed to the formation of pinholes and cracks during the HPP treatment. In this film, most of the properties changed more in the presence of oil as the food simulant.
Authors:
M J Galotto; P A Ulloa; A Guarda; R Gavara; J Miltz
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of food science     Volume:  74     ISSN:  1750-3841     ISO Abbreviation:  J. Food Sci.     Publication Date:  2009 Aug 
Date Detail:
Created Date:  2009-09-02     Completed Date:  2010-01-12     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0014052     Medline TA:  J Food Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  E304-11     Citation Subset:  IM    
Affiliation:
LABEN-CHILE, Packaging Lab, Dept. of Science and Food Technology, Faculty of Technology, Univ. of Santiago de Chile, Santiago, Chile. maria.galotto@usach.cl
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MeSH Terms
Descriptor/Qualifier:
Aluminum Oxide / chemistry
Biopolymers / chemistry*
Elasticity
Food Handling / methods*
Food Technology / methods
Lactic Acid / chemistry*
Membranes, Artificial*
Oxygen / chemistry
Permeability
Plant Oils / chemistry
Polyethylene Terephthalates / chemistry*
Polymers / chemistry*
Pressure*
Silicon Dioxide / chemistry
Steam
Surface Properties
Temperature
Tensile Strength
Water / chemistry
Chemical
Reg. No./Substance:
0/Biopolymers; 0/Membranes, Artificial; 0/Plant Oils; 0/Polyethylene Terephthalates; 0/Polymers; 0/Steam; 1344-28-1/Aluminum Oxide; 26100-51-6/poly(lactic acid); 50-21-5/Lactic Acid; 7631-86-9/Silicon Dioxide; 7732-18-5/Water; 7782-44-7/Oxygen; 8001-25-0/olive oil

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


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