Physical and Barrier Properties of Clove Essential Oil Loaded Potato Starch Edible Films

This study explores the effect of Clove essential oil (CEO) nanoemulsion on the physical and physicochemical properties of potato starch edible films. Mechanical properties at puncture tests, film thermal stability, morphology, color CIELAB parameters, water vapor permeability, and gas barrier properties towards oxygen and carbon dioxide were determined. Films were characterized with white color and high opacity. The films' surface morphology was examined by polarized microscopy, and homogeneous distribution of the incorporated nanoemulsion into the edible film was observed. The loaded CEO improved the water and gas barrier properties of the films. In this way, the formulated new multicomponent films are suitable for use in the design of active food packaging.

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Halloysite Nanotubes/Polyethylene Nanocomposites for Active Food Packaging Materials with Ethylene Scavenging and Gas Barrier Properties

Food and Bioprocess Technology ◽

10.1007/s11947-017-1860-0 ◽

2017 ◽

Vol 10 (4) ◽

pp. 789-798 ◽

Cited By ~ 41

Author(s):

C. Erdinc Tas ◽

Saman Hendessi ◽

Mustafa Baysal ◽

Serkan Unal ◽

Fevzi C. Cebeci ◽

...

Keyword(s):

Food Packaging ◽

Barrier Properties ◽

Halloysite Nanotubes ◽

Packaging Materials ◽

Gas Barrier ◽

Food Packaging Materials ◽

Active Food Packaging ◽

Gas Barrier Properties

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Impact of Backbone Amide Substitution at the Meta- and Para-Positions on the Gas Barrier Properties of Polyimide

Materials ◽

10.3390/ma14092097 ◽

2021 ◽

Vol 14 (9) ◽

pp. 2097

Author(s):

Qian Wen ◽

Ao Tang ◽

Chengliang Chen ◽

Yiwu Liu ◽

Chunguang Xiao ◽

...

Keyword(s):

Transmission Rate ◽

Barrier Properties ◽

Polyimide Film ◽

Flexible Display ◽

Gas Barrier ◽

Positron Annihilation Lifetime ◽

Barrier Materials ◽

Oxygen Transmission Rate ◽

Display Technology ◽

Gas Barrier Properties

This study designed and synthesised a meta-amide-substituted dianiline monomer (m-DABA) as a stereoisomer of DABA, a previously investigated para-amide-substituted dianiline monomer. This new monomer was polymerised with pyromellitic dianhydride (PMDA) to prepare a polyimide film (m-DABPI) in a process similar to that employed in a previous study. The relationship between the substitution positions on the monomer and the gas barrier properties of the polyimide film was investigated via molecular simulation, wide-angle X-ray diffraction (WXRD), and positron annihilation lifetime spectroscopy (PALS) to gain deeper insights into the gas barrier mechanism. The results showed that compared with the para-substituted DABPI, the m-DABPI exhibited better gas barrier properties, with a water vapour transmission rate (WVTR) and an oxygen transmission rate (OTR) as low as 2.8 g·m−2·d−1 and 3.3 cm3·m−2·d−1, respectively. This was because the meta-linked polyimide molecular chains were more tightly packed, leading to a smaller free volume and lower molecular chain mobility. These properties are not conducive to the permeation of small molecules into the film; thus, the gas barrier properties were improved. The findings have significant implications for the structural design of high-barrier materials and could promote the development of flexible display technology.

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