Active bilayer films of thermoplastic starch and polycaprolactone obtained by compression molding

Ortega-Toro, Rodrigo; Morey, Iris; Talens, Pau; Chiralt, Amparo

doi:10.1016/j.carbpol.2015.03.080

Cited by 77 publications

(53 citation statements)

References 24 publications

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“…Comparable results have been obtained in a recent study, Ortega-Toro et al [33] have shown that ascorbic acid sprayed at the interface between layers of TPS and PCL can favor the layer adhesion. In our work this effect is all the more important when ascorbic acid is associated with iron particles.…”

Section: Mechanical Propertiessupporting

confidence: 60%

“…But this decrease remains low: coextrusion with PCL does not efficiently protect TPS-based layers from water absorption. Ortega-Toro et al [33] have measured a very little water vapor permeability of a PCL film. Their bilayer films of TPS-PCL have low water-vapor permeabilities too, but they were obtained by compression molding and not by coextrusion.…”

Section: Water Vapor Absorptionmentioning

confidence: 99%

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Research Article. Role of ascorbic acid and iron in mechanical and oxygen absorption properties of starch and polycaprolactone multilayer film

Mahieu¹,

Terrie²,

Leblanc³

2017

Packaging Research

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A trilayer film based on thermoplastic starch (TPS) for the core layer and poly(ϵ-caprolactone) (PCL) for the skin layers was obtained by coextrusion. Ascorbic acid and iron powder were added at respectively 15% and 1.5% w/w in the TPS layer for their capacity to act as oxygen scavenger, making the film usable as active food packaging. This study demonstrates that these compounds also play a role in the interactions between the different layers. FTIR measurements show that ascorbic acid migrates at the interface between TPS and PCL, where it acts as a compatibiliser between both polymers, probably by creating new interactions between polar functions of both polymers. This leads to a better adhesion of the different layers, demonstrated by the increase of the adhesion energy from 4.10 −3 N·mm −1 for the multilayer film TPS-PCL to 12.10 −3 N·mm −1 for the multilayer film containing the active components. Thanks to this compatibilising effect, the mechanical properties of the multilayer film containing ascorbic acid and iron are widely improved with an average maximal tensile strength of 7 MPa, against 3.7 MPa for the multilayer film without the active components and with an elongation at break of respectively 1450% against 290%. However, despite the hydrophobicity of PCL, the water sorption of the TPS-based layer is only slightly reduced. The multilayer film shows active oxygen scavenging properties but the rate of this reaction is divided by two compared to the active film without PCL layers (15 days to reach less than 1% oxygen for the active film without PCL layers and approximately 30 days to reach the same oxygen level with the multilayer active film).

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Section: Mechanical Propertiessupporting

confidence: 60%

Section: Water Vapor Absorptionmentioning

confidence: 99%

Research Article. Role of ascorbic acid and iron in mechanical and oxygen absorption properties of starch and polycaprolactone multilayer film

Mahieu¹,

Terrie²,

Leblanc³

2017

Packaging Research

View full text Add to dashboard Cite

show abstract

“…Moreover, processing ability of PCL by extrusion as well as its compatibility with other materials, make it an attractive polymer for several applications 8,9 . PCL-starch blends have been studied and the effects of starch on mechanical properties and biodegradation time were evaluated [10][11][12][13] . In addition, PCL-natural-organic fillers (eggshell, coconut, abaca, kenaf, seaweed, rice straw, sisal) composites have also been investigated 2,[14][15][16][17][18][19][20] .…”

Section: Introductionmentioning

confidence: 99%

Biodegradation Study of a Novel Poly-Caprolactone-Coffee Husk Composite Film

et al. 2016

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Plastic disposal is a worldwide issue due to its long degradation time. Environmentally degradable polymers (EDPs) have received considerable attention because of their faster degradation. However, the use of EDPs is limited by high cost and restricted properties. The incorporation of organic fillers is an alternative to reduce cost while increasing biodegradation. Poly-caprolactone (PCL) is a biodegradable polyester compatible with organic fillers. Coffee husk (CH) is a sub-product of coffee processing with potential use as organic filler. We prepared a novel PCL-CH composite film and investigated the effects of CH incorporation on the biodegradation of PCL. Biodegradation study was carried out in soil for 120 days, and evaluated by weight loss measurements. Additionally, soil microbiological and granulometric analyses were performed. Bacteria and fungi were found in the soil that was classified as sandy. The composite film degraded twice faster than PCL film probably due to the adhesion of microorganisms on the coffee husk.

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“…With the extension of time, film adsorbed more water ( Table 1) and WVP of each film approached gradually. Ortegatoro et al [23] reported, after 5 weeks of storage, no noticeable changes in the WVP values were observed and the bilayer films still maintained their low WVP values.…”

Section: Wvpmentioning

confidence: 97%

“…And, water solubility of bilayer film remained constant for 60 days, indicating that the film solubility was relatively stable. Ortegatoro et al [23] also pointed out that water solubility of bilayer changed little after 5 weeks of storage.…”

Section: Properties Stability Of Films During Storagementioning

confidence: 99%

Effect of bilayer coating composed of polyvinyl alcohol, chitosan, and sodium alginate on salted duck eggs

Jiang

Zhuang

Zhong

et al. 2018

International Journal of Food Properties

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The composite bilayer film based on polyvinyl alcohol, sodium alginate, and chitosan were developed in this study, and the effects of the related coating on internal-quality changes of salted duck eggs (SDEs) during storage were determined. The results showed that the overall properties of the bilayer film were better than those of monolayer films, including storage stability. Coatings could significantly (p < 0.05) reduce quality deterioration of SDEs such as water loss, oil exudation, and gritty. The bilayer coating was more effective in inhibiting the increase of egg yolk pH and total bacterial counts than monolayer coatings. After storage for 60 days, water content of bilayer coated SEDs was 19.7% higher than that of the control SDEs, oil exudation was 38% higher, and gritty texture was 27.9% higher. Moreover, bilayer coating could prolong the shelf life of SDEs to more than 60 days at 25°C and 50% relative humidity according to the results of total bacterial count experiment, while the shelf life of control SDEs was less than 45 days. This study indicated the potential application of bilayer composite coating for preservation of SDEs. ARTICLE HISTORY

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Active bilayer films of thermoplastic starch and polycaprolactone obtained by compression molding

Abstract: ElsevierOrtega-Toro, R.; Morey, I.; Talens Oliag, P.; Chiralt A. (2015).

Cited by 77 publications

References 24 publications

Research Article. Role of ascorbic acid and iron in mechanical and oxygen absorption properties of starch and polycaprolactone multilayer film

Research Article. Role of ascorbic acid and iron in mechanical and oxygen absorption properties of starch and polycaprolactone multilayer film

Biodegradation Study of a Novel Poly-Caprolactone-Coffee Husk Composite Film

Effect of bilayer coating composed of polyvinyl alcohol, chitosan, and sodium alginate on salted duck eggs

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