Migration phenomena of surfactants in polyethylene film

Lee, Kangseok; Cho, Kyucheol; Park, Inha; Lee, Byung H.; Rana, Dipak; Choe, Soonja

doi:10.1002/(sici)1099-0488(19990701)37:13<1387::aid-polb4>3.0.co;2-b

Cited by 18 publications

(7 citation statements)

References 30 publications

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“…The Arrhenius activation parameter, E D , has been shown to have a dependence on the size of the liquid molecules and is usually positive, corresponding to the diffusivity increasing with rising T. For the rate of diffusion of a liquid into a solid, the activation energy corresponds to the energy required for a diffusing molecule to push past the opposing molecules of the chocolate matrix. In general, higher activation energies are observed for larger migrating molecules [17,22,24]. Fig.…”

Section: Thermodynamic and Activation Parametersmentioning

confidence: 79%

“…One of the most common and direct methods used to measure migration is the mass gain probe; here, the mass of an amorphous polymer sample immersed in an infinite bath of a penetrant is monitored [22]. In order to simplify the boundary conditions, an appropriate geometry is chosen to affect the one-dimensional diffusion process.…”

Section: Migration Of Foreign Fatsmentioning

confidence: 99%

“…(iv) A value of n ,0.5 indicates a pseudo-Fickian behaviour of diffusion where sorption curves resemble Fickian curves, but the approach to final equilibrium is very slow [22].…”

Section: Migration Of Foreign Fatsmentioning

confidence: 99%

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Hazelnut oil migration in dark chocolate – kinetic, thermodynamic and structural considerations

Khan

Rousseau

2006

Eur. J. Lipid Sci. Technol.

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The objective of this study was to assess the effects of three storage temperatures (11, 20 and 26 7C) on the migration kinetics and equilibrium states of a model filled confection consisting of dark chocolate and a hazelnut oil-based filling. HPLC, atomic force microscopy and X-ray diffraction were used to study the migration behaviour of hazelnut oil into simulated filled confections and the associated changes in microstructure. Using a Fickean model, the mechanism for the migration of foreign triacylglycerols (TAG) into chocolate was evaluated. Deviations from Fickian diffusion were noted with increasing temperature, and resulted from the breakdown of the chocolate matrix. At higher temperatures, filled dark chocolate exhibited accelerated fat bloom formation due to the increased ingress of foreign incompatible TAG. The rate of migration and the diffusion coefficient increased 20 and 400 times, respectively, when the storage temperature was raised from 11 to 26 7C. The amplified rate of migration at elevated temperatures resulted in a confectionary product with a severe loss in quality. There was significant degradation in the texture and gloss of the product within 24 h of storage at 26 7C. However, the storage of filled dark chocolate at 11 and 20 7C showed negligible deterioration over 8 wk. Overall, the results from this study offer some insight into the optimisation for the production and storage of filled chocolates.

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Section: Thermodynamic and Activation Parametersmentioning

confidence: 79%

Section: Migration Of Foreign Fatsmentioning

confidence: 99%

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Hazelnut oil migration in dark chocolate – kinetic, thermodynamic and structural considerations

Khan

Rousseau

2006

Eur. J. Lipid Sci. Technol.

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“…9,10 Both internal and external approaches have been used to enhance its hydrophilicity. 6,11,12 Internal doping is generally realized by adding surfactants with suitable value of hydrophilic balance, which limited by slow migration of the additive to the surface and limits long-term storage. External super-hydrophilic coatings are fabricated by depositing functional materials, which usually contain hydrophilic groups such as hydroxyl, to spread water molecule.…”

Section: Introductionmentioning

confidence: 99%

Mussel‐inspired catechol‐based chemistry for direct construction of super‐hydrophilic and waterproof coatings on intrinsic hydrophobic surfaces

Zhang

Wang

Jiang

et al. 2019

J of Applied Polymer Sci

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Super‐hydrophilic coatings are useful in many applications such as agricultural greenhouses. However, the direct modification of super‐hydrophilic coatings on intrinsic hydrophobic surfaces is still a challenge, particularly without any pretreatment. Here, highly transparent super‐hydrophilic and waterproof coatings on intrinsic hydrophobic surfaces were prepared via layer‐by‐layer (LbL) assembly catechol‐grafted polymer‐branched poly(ethylenimine) (bPEI)‐3‐(3,4‐dihydroxyphenyl)propionic acid (denoted as C) and poly(acrylic acid) (PAA)‐dopamine (denoted as D) inspired by the mussel. The catechol‐functionalized polymer facilitates a mechanically robust coating that is tightly attached to the surface of the intrinsic hydrophobic polymers. This gives the coating excellent antifogging ability with a lowest contact angle of 0°. These coatings also demonstrated excellent stability after cross‐linking with Fe3+ or alkali species. The super‐hydrophilic and waterproof coatings on intrinsic hydrophobic surfaces can also be prepared by the spray method. The super hydrophilic coating exhibits favorable antifogging ability, making it potentially useful in numerous applications. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48013.

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“…Although the importance of these parameters in the antifog effect durability is clear, there is little literature data that relate the antifog effect durability to the film composition as well as to the service temperature. [5][6][7] The literature data show that, in polyethylene, the migration rate of the antifog additive decreases when the additive size increases. 8 Moreover, when the crystallinity of polyethylene is increased, the migration rate of the additive to the surface increases.…”

Section: Introductionmentioning

confidence: 99%

Migration of antifog additives in agricultural films of low‐density polyethylene and ethylene‐vinyl acetate copolymers

Irusta

González

Fernández‐Berridi

et al. 2008

J of Applied Polymer Sci

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In this work, polymer films of low density polyethylene and ethylene-vinyl acetate copolymers containing two types of antifog additives (nonionic surfactants) were exposed to two simulated horticultural greenhouse environments, reproducing hot and cold climate conditions. The evolution of the antifog effect was visually observed and that of the additive concentration measured using Fourier transform infrared spectroscopy (FTIR). All the films studied showed good antifog properties, but in all cases, the duration of the antifog effect was longer in the hot-climate test. From the FTIR, we can conclude that the additives studied showed a low migration rate and, therefore, when the antifog effect is lost, important quantities of the additive remain in the bulk.

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Migration phenomena of surfactants in polyethylene film

Cited by 18 publications

References 30 publications

Hazelnut oil migration in dark chocolate – kinetic, thermodynamic and structural considerations

Hazelnut oil migration in dark chocolate – kinetic, thermodynamic and structural considerations

Mussel‐inspired catechol‐based chemistry for direct construction of super‐hydrophilic and waterproof coatings on intrinsic hydrophobic surfaces

Migration of antifog additives in agricultural films of low‐density polyethylene and ethylene‐vinyl acetate copolymers

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