Antimicrobial, mechanical, and physicochemical properties of ethylene vinyl alcohol (EVOH) extruded films blended with propolis
Antimicrobial, mechanical, and physicochemical properties of ethylene vinyl alcohol (EVOH) extruded films blended with propolis
نویسندگان: بی بی مرضیه رضوی زاده , راضیه نیازمند , سمیه حاجی نژاد , اسماعیل قاسمی
نشریه: INTERNATIONAL JOURNAL OF FOOD PROPERTIES , 1 , 23 , 2020
کد مقاله |
1836 |
عنوان فارسی مقاله |
Antimicrobial, mechanical, and physicochemical properties of ethylene vinyl alcohol (EVOH) extruded films blended with propolis |
عنوان لاتین مقاله |
Antimicrobial, mechanical, and physicochemical properties of ethylene vinyl alcohol (EVOH) extruded films blended with propolis |
نمایه علمی معتبر |
JCR |
IF |
2.727 |
عنوان نشریه |
INTERNATIONAL JOURNAL OF FOOD PROPERTIES |
شماره نشریه |
1 |
دوره |
23 |
سال انتشار شمسی |
1399/08/18 |
سال انتشار میلادی |
2020 |
Antimicrobial packaging is used for improving shelf life of food. Propolis is
a natural substance with antimicrobial effects that can be applied in packaging.
The current study investigated the mechanical and antimicrobial properties
of active packaging films of ethylene vinyl alcohol including propolis.
Crude propolis was added to the polymer matrix at different ratios (20%,
15%, 10%, 5%, and 0%; w/w) and the films were primed by extrusion method.
The mechanical attributes of the films showed that the incorporation of
propolis to the EVOH film reduced the elongation to tear of the films and
decreased the tensile strength. Scanning electron microscopy images also
demonstrated that the films had a more heterogeneous morphology than
pure ethylene vinyl alcohol and propolis particles had a good distribution
within the polymer matrixes. Agglomeration did not observe. In addition,
water permeability (WVP) and oxygen permeability (OTR) decreased with
raising propolis percentage in comparison with the control film significantly
(p < .05). Differential scanning calorimetry test showed that an increase
propolis in the polymer matrix reduced the crystallization temperature and
increased the crystallinity percentage. Antimicrobial effect on Aspergillus
Niger and Saccharomyces cerevisiae, Staphylococcus aureus, and Escherichia
coli was increased with increased percentage of propolis in the blended films.
However, its effect on Gram-positive Staphylococcus aureus was much more
than the other microorganisms studied. |