Journal
PROGRESS IN ORGANIC COATINGS
Volume 111, Issue -, Pages 186-195Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.porgcoat.2017.05.016
Keywords
Pyrogallol; Oxygen scavenger; Polyurethane; Film coating; Active packaging
Funding
- One Jung Can (OJC) Manufacturing Co., Ltd. Seoul, South Korea
- project entitled Development of oxygen scavenging package for fish cake [2015-51-031]
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Oxygen scavenging films were prepared with 1, 3, 5, 10, and 20% pyrogallol coated onto a modified LDPE film. The color, mechanical, barrier, and surface properties of the LDPE/PG oxygen scavenging films were compared to those of a pure LDPE film. The results demonstrate that pyrogallol was well coated onto the surface of the modified LDPE film. The LDPE/PG films had a slightly rough film surface, which results in higher water and oxygen permeabilities as well as lower TS due to the addition and agglomerations of sodium carbonate and pyrogallol. The pyrogallol coating also caused color alterations of the LDPE/PG film. In addition, the oxygen scavenging properties of the LDPE/PG films were evaluated at different relative humidities (RH) and temperatures. The oxygen content (%) in the headspace of the absorption cell containing the LDPE/PG 20% film, which was initially 20.9%, decreased to 9.42% after 8 days at 23 degrees C. The LDPE/PG 20% film showed an effective oxygen scavenging capacity of 0.443 mL/cm(2) at 23 degrees C. Water was used as an activator to initiate the oxygen scavenging reaction.
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