Nanoscale, zero valent iron particles for application as oxygen scavenger in food packaging
Zenon Foltynowicz , Alexander Bardenshtein , Sven Sängerlaub , Helle Antvorskov , Wojciech Kozak
AbstractOxygen scavengers which are based on oxidation of iron powder dispersed in a polymer matrix are established in the packaging industry. They protect foods from oxygen. The iron particles have a diameter of several micrometers, which is too high to allow thin layers in multilayer film structures. A promising alternative is a developed nanoscale oxygen scavenger which is subject of this study. The aim of this study was to evaluate the oxygen absorption rate and the oxygen absorption capacity of nanoscale iron at 100% relative humidity and at dry conditions. Nanoscale oxygen scavengers (zero valent iron particles) were synthesized. Their reactivity was tested. Furthermore, they were blended with a silicone matrix. The nanoscale oxygen scavenger absorbed oxygen in wet (100% relative humidity) and dry conditions. At 100% relative humidity the reaction rate of the powder was two to three times higher compared to non-nanoscale iron powder. The absorption rate of the nanoscale i ron dispersed in a silicon carrier was at least ten times higher at 100% relative humidity compared to a commercially available iron based oxygen scavenger in a polyethylene or polypropylene polymer matrix.
|Journal series||Food Packaging and Shelf Life, ISSN 2214-2894, (0 pkt)|
|Publication size in sheets||0.5|
|Keywords in English||Nanoparticle, Oxidation, Core-shell nanoparticle, Active packaging|
|ASJC Classification||; ; ; ;|
|Score||= 15.0, 17-03-2020, ArticleFromJournal|
|Publication indicators||= 8; : 2017 = 1.554; : 2017 = 3.347 (2)|
|Citation count*||18 (2020-06-29)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.