A Polyethylene Base Moisture Activating Oxygen Scavenging Film Co-Extruded with Tea Polyphenols-β-Cyclodextrin Inclusion Complex

Abstract

Antioxidant packaging is an effective method to protect oxygen-sensitive food from oxidation. In order to concurrently obtain a storage stability and excellent oxygen scavenging of antioxidant film for the high moisture food, a moisture activating oxygen scavenging film was prepared by using tea polyphenols as the oxygen scavenger. The moisture activating function was achieved by introducing the β-cyclodextrin embedding technology, and the tea polyphenols–β-cyclodextrin inclusion complex was co-extruded with low-density polyethylene (LDPE) to improve the storage stability. The results indicate that the tea polyphenols is well embedded by β-cyclodextrin according to the Fourier transform infrared spectra (FT-IR), and a relatively homogeneous dispersion of oxygen scavenger is observed while the oxygen scavenger content is less than 5%. The oxygen scavenging increases with the increase of oxygen scavenger from 1% to 5%, and a maximal oxygen absorption of 0.0150 mol/m2 is exhibited at oxygen scavenger content value of 5%. Then, the oxygen scavenging significantly decrease under the oxygen scavenger content of 7% and 10%. Moreover, the oxygen scavenging amount sharply increase after steeping in water or storage in extremely high humidity of RH 84% while the oxygen scavenging is restrained under RH 32–75%, indicating that the moisture activating oxygen scavenging is functioning. The oxygen scavenging is obvious restrained under low temperature of 4 °C while the oxygen scavenging is activated at 23 °C and 50 °C with similar oxygen scavenging amount. Besides, both of the tensile and heat-sealing strength deteriorative with the increase of oxygen scavenger content, while they are acceptable at oxygen scavenger content of 5%. Finally, the prepared oxygen scavenging film was used for packaging orange juice and received a good antioxidant effect. Thus, the acquired moisture activating oxygen scavenging film has a good stability under regular storage condition, and shows a potentially application for oxygen-sensitive food with high moisture content.

Environmentally Friendly Polymer Compositions with Natural Amber Acid

“…Despite the high price, α-tocopherol is used to stabilize polyethylene medical devices [ 11 , 12 , 13 ]. Moreover, compounds of natural origin that have been proposed in the scientific literature as stabilizers for polymer materials include carotenoids, polyphenolic compounds (flavonoids, curcuminoids, phenolic acids) and phenolic polymers (lignin, tannin) [ 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 ].…”

β-Cyclodextrin-Tethered Butein, a Greener Redox-Active Biomaterial for Electrochemical Enzymatic Sensing of Sialic Acid

“…Assynthesized Bt in ethanol solution (5 mM) was further used for conjugation with BCD (5 mM) in DI H 2 O using a 1:1 molar ratio. The conjugate was prepared by adding the ethanolic solution of Bt in a dropwise manner into the aqueous BCD solution while stirring at 500 rpm, 80 °C for 4 h. Then, the mixture was lyophilized at −80 °C for 48 h. 27 After lyophilization, the residual solvents in the conjugated materials were removed by evaporation at 60 °C for 2 h to obtain the BCD-Bt bioconjugates. The final conjugated sample of BCD-Bt appeared to be a pale yellow-colored powder.…”

Designing an Oxygen Scavenger Multilayer System Including Volatile Organic Compound (VOC) Adsorbents for Potential Use in Food Packaging

“…Figure 3b showed that the scavenging activity of the 3-layer active film was slightly slower and lower at lower temperature (7 • C), and higher deviation values between samples were found. The increase in oxygen scavenging activity with the temperature has also been observed when using antioxidants as oxygen scavenger, such as gallic acid and tea polyphenols, because their activities increased at higher temperatures [28,29].…”