Study of Barrier Properties of Polymeric Films to Various Organic Aromatic Vapors

Gilbert, Seymour G.; Hatzidimitriu, E.; Lai, Christopher C.; Passy, N.

doi:10.1016/b978-0-12-168901-8.50030-7

Cited by 19 publications

(7 citation statements)

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“…DeLassus' stated that the permeability of limonene in Saran@ film is 9000 times less than in polyolefins, such as polyethylene and polypropylene (PP). According to Gilbert et a1., 6 permeation of ethyl acetate is much less in glassine and nylon than in PE, PP and polyvinylidene chloride. Nielsen et al 4 reported that the level of sorption of apple aromas in aqueous solution was considerably less in the polar polymers polyethylene terephthalate (PET) and polyamide (PA) than in the nonpolar polyolefins.…”

Section: P = D X Smentioning

confidence: 97%

The sorption of limonene/ethyl acetate binary vapour mixtures by a biaxially oriented polypropylene film

Nielsen

Giacin

1994

Packag Technol Sci

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The sorption of ethyl acetate and limonene as individual sorbates and in binary vapour mixtures by an oriented polypropylene was determined by t w o independent methods, namely by gravimetric and thermal stripping/thermal desorption procedures. The t w o methods showed excellent agreement. The solubility coefficients for the t w o species were found t o be independent of sorbate concentration within the ranges studied, indicating that sorption followed Henry's law. Calculated and experimentally obtained sorption profile curves agreed well for both ethyl acetate and limonene at low vapour activities. At a limonene vapour activity of 0.29 there was a lack of agreement between experimental and calculated results. This was attributed t o the onset of non-Fickian relaxation effects occurring within the polymer matrix at this limonene concentration. The results of sorption studies involving binary vapour mixtures indicated that at the concentration levels evaluated, the co-permeant did not effect the sorption characteristics of the other sorbate.Keywords: sorption; diffusion; permeation; limonene; ethyl acetate; binary mixture; vapours; packaging material; polypropylene; thermal stripping; thermal desorption; electrobalanceLoss of flavour constituents from foodstuffs due to sorption into and permeation through plastic packaging materials can result in the loss of product quality and a concomitant reduction in shelf-life for the packaged product. Permeation is described by Equation 1. P = D x S(1)The permeability coefficient (P) expresses the transport rate at steady-state, the diffusion coefficient (D) describes how quickly the permeant molecules move in the film and the solubility coefficient *To whom correspondence should be addressed.( S ) is a measure of the amount of a substance that will be absorbed by the polymer. Various investigators have shown that the diffusion, solubility and, therefore, the permeability coefficients are dependent upon a number of parameters. Landois-Garza and Hotchkiss' reported that an increase in permeant molecular weight resulted in an increase in the solubility of ethyl esters in polyvinyl alcohol (PVA), while the diffusivity decreased. Similar effects were found by Shimoda et a1.,2 who studied the transport of esters, aldehydes, alcohols and alkanes in polyethylene (PE) films. The type of functional group characteristic of the penetrant molecule is also of great importance in determining the extent of sorption by the packaging material. For example, esters

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Section: P = D X Smentioning

confidence: 97%

The sorption of limonene/ethyl acetate binary vapour mixtures by a biaxially oriented polypropylene film

Nielsen

Giacin

1994

Packag Technol Sci

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“…Early work focused on volatile absorption from sources external to the package (Gilbert and Pegaz, 1969). Haydanek et al (1970) and Gilbert et al (1982) examined volatile uptake by various packaging polymers. The tendency for absorption varied with polymer type.…”

Section: Introductionmentioning

confidence: 99%

Absorption of Citrus Flavor Volatiles by Low Density Polyethylene

Sadler

Braddock

1991

Journal of Food Science

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The ability of low density polyethylene (LDPE) to absorb citrus flavor compounds was examined. The LDPE sample was mounted on an oxygen electrode. As volatiles were absorbed, oxygen permeation through the polymer increased. Limonene, ethyl butyrate, myrcene, and a-pinene were readily absorbed by LDPE. Octanal, citral, lina-1001, and c+terpineol were absorbed at much lower levels. Time-course changes in readings were used to calculate diffusion coefficients of volatiles in the polymer. Diffusion coefficients were proportional to the volatile's solubility in the polymer.

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“…from the expression: D lag = 4T2/6 0 where D,,, = apparent lag time diffusion coefficient, f? = film thickness and 0 = lag time.The transport of organic vapors through polymeric packaging materials has been the subject of several recent investigations(Zobel, 1982(Zobel, , 1984(Zobel, , 1985Gilbert et al, 1983in Glassine base structure at 2.5 ppm and 20.5"C.…”

mentioning

confidence: 99%

Permeability and Solubility of d‐Limonene Vapor in Cereal Package Liners

Mohney

Hernández

Giacin

et al. 1988

Journal of Food Science

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Studies were carried out on the solubility and permeability of limonene vapor in two cereal package liners. The effect of limonene partial pressure on the permeation rate and permeability coefficient was determined over a concentration range of 0.3 to 7 ppm (wt/v). The equilibrium sorption concentration and solubility coefficient of limonene in the liner films were also determined by a micro-balance gravimetric technique. Data obtained provided information necessary for the estimation of the storage quality of a packaged fruit-flavored cereal product whose quality is related to the retention of volatile aroma constituents within the package headspace.

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Study of Barrier Properties of Polymeric Films to Various Organic Aromatic Vapors

Cited by 19 publications

References 0 publications

The sorption of limonene/ethyl acetate binary vapour mixtures by a biaxially oriented polypropylene film

The sorption of limonene/ethyl acetate binary vapour mixtures by a biaxially oriented polypropylene film

Absorption of Citrus Flavor Volatiles by Low Density Polyethylene

Permeability and Solubility of d‐Limonene Vapor in Cereal Package Liners

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