Development of biodegradable flexible films of starch and poly(lactic acid) plasticized with adipate or citrate esters

Shirai, Marianne Ayumi; Grossmann, Maria Victória Eiras; Mali, Suzana; Yamashita, Fábio; Garcia, Patrícia Salomão; Müller, Carmen Maria Olivera

doi:10.1016/j.carbpol.2012.09.038

Cited by 148 publications

(67 citation statements)

References 13 publications

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“…The characteristic peaks at 1004 cm −1 are assigned to C-O bond stretching of C-O-C groups in the anhydro-glucose ring of SPS. Similar peaks were observed on native and plasticized starch by Shirai et al (2013) These results manifested that all films showed absorption peaks in the same regions, irrespective of plasticizer type and concentration. This reveals that they possess similar functional groups.…”

Section: Ftir Analysissupporting

confidence: 80%

Effect of plasticizer type and concentration on physical properties of biodegradable films based on sugar palm (arenga pinnata) starch for food packaging

et al. 2015

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In this study, sugar palm starch (SPS) films were developed using glycerol (G), sorbitol (S) or their combination (GS) as plasticizers at the ratio of 15, 30 and 45 (wt)% using casting technique. The addition of plasticizers to SPS film-forming solutions helped to overcome the brittle and fragile nature of unplasticized SPS films. Increased plasticizer concentration resulted to an increase in film thickness, moisture content and solubility. On the contrary, density and water absorption of plasticized films decreased with increasing plasticizer concentration. Raising the plasticizer content from 15 to 45 % showed less effect on the moisture content and water absorption of S-plasticized films. Films containing glycerol and glycerol-sorbitol plasticizer (G, and GS) demonstrated higher moisture content, solubility and water absorption capacity compared to S-plasticized films. The results obtained in this study showed that plasticizer type and concentration significantly improves film properties and enhances their suitability for food packaging applications.

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Section: Ftir Analysissupporting

confidence: 80%

Effect of plasticizer type and concentration on physical properties of biodegradable films based on sugar palm (arenga pinnata) starch for food packaging

et al. 2015

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“…In the previous work adipate esters, compared with citrate esters, improved the mechanical properties of TPS/PLA films produced by blown extrusion [22] and TPS/PLA sheets obtained by calendering extrusion, [23] reducing the elastic modulus and the tensile strength and increasing the elongation at rupture. Adipate esters were also studied by other authors [24,25] to enable the production of flexible PLA films.…”

Section: Introductionmentioning

confidence: 94%

Poly(lactic acid)/thermoplastic starch sheets: effect of adipate esters on the morphological, mechanical and barrier properties

et al. 2016

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SbstractBlends of poly(lactic acid) (PLA) and thermoplastic starch (TPS) plasticized with adipate esters (diisodecyl adipate and diethyl adipate) having different molecular weight were used to produce sheets. The calendering-extrusion process at a pilot scale was used, and the mechanical, barrier, and morphological characterization of the obtained materials were performed. The increase in the TPS content affected the mechanical properties of the sheets by increasing the elongation and decreasing the rigidity. TPS conferred a more hydrophilic character to the sheets, as observed from the water vapor permeability results. The sheets plasticized with diisodecyl adipate (DIA), having a higher molecular weight, had better mechanical and barrier properties than diethyl adipate (DEA) plasticized sheets, indicating that DIA was more effective as plasticizer. Micrographs obtained by confocal laser microscopy and scanning electron microscopy showed different morphologies when different proportions of PLA and TPS were used (dispersed or co-continuous structures), which were strongly associated with the mechanical and barrier properties.

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“…However, the majority of biodegradable polymers (polyhydroxyalkanoates (PHAs), polyhydroxybutyrate (PHB), polylactic acid (PLA), polycaprolactones (PCL)) are higher in cost and possess inferior mechanical properties compared with, for example, high-density polyethylene (HDPE) and low-density polyethylene (LDPE) [1,2] . Starch, a natural, low-cost polymer from renewable sources, also produces materials with diminished mechanical properties and high moisture sensitivity, even when used in blends with other biodegradable polymers [3][4][5][6][7] . In this context, natural fibers have been studied as a good alternative for reinforcement being mixed with pure biodegradable polymers or their blends to form composites with reduced environmental impact [8] .…”

Section: Introductionmentioning

confidence: 99%

Oat fibers modification by reactive extrusion with alkaline hydrogen peroxide

et al. 2016

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SbstractThe modification of lignocellulosic fibers can enhance their interaction with other materials and alkaline hydrogen peroxide (AHP) is a reagent widely used to promote such modification. This work aimed to modify oat hulls fibers by reactive extrusion using AHP (7 g 100 g -1 of hulls). The modified oat hulls displayed performances comparable to those observed by other researchers using conventional AHP method (without extrusion). The AHP treated oat hulls showed increased luminosity compared to the extruded ones. Fourier transform infrared spectroscopy showed differences between the modified and unmodified structures. The removal of surface compounds resulted in a more open morphology, with greater surface area and greater porosity. Reactive extrusion can be an alternative method for fiber modification with several advantages, such as short processing time and no wastewater generation.

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Development of biodegradable flexible films of starch and poly(lactic acid) plasticized with adipate or citrate esters

Cited by 148 publications

References 13 publications

Effect of plasticizer type and concentration on physical properties of biodegradable films based on sugar palm (arenga pinnata) starch for food packaging

Effect of plasticizer type and concentration on physical properties of biodegradable films based on sugar palm (arenga pinnata) starch for food packaging

Poly(lactic acid)/thermoplastic starch sheets: effect of adipate esters on the morphological, mechanical and barrier properties

Oat fibers modification by reactive extrusion with alkaline hydrogen peroxide

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