Influence of citric acid and water on thermoplastic wheat flour/poly(lactic acid) blends. I: Thermal, mechanical and morphological properties

Chabrat, Elodie; Abdillahi, Houssein; Rouilly, Antoine; Rigal, Luc

doi:10.1016/j.indcrop.2011.11.034

Cited by 68 publications

(65 citation statements)

References 26 publications

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“…The lower storage modulus of the PLA/TPS sheets plasticized with adipate or citrate ester compared to the control formulation indicated a decrease in the rigidity, as observed previously in the mechanical properties ( Table 1). The slight increase in the storage modulus at temperatures of 80-120°C was related to PLA cold-crystallization, as described in other studies [12,13,41], explaining the residual crystallinity observed in the diffractograms. When plasticizers were incorporated into the PLA/TPS matrix, the peak intensity shifted to a lower temperature, and a slight increase in the loss modulus was observed.…”

Section: X-ray Diffractionsupporting

confidence: 81%

Adipate and Citrate Esters as Plasticizers for Poly(Lactic Acid)/Thermoplastic Starch Sheets

et al. 2014

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Poly(lactic acid) (PLA) and thermoplastic starch (TPS) sheets plasticized with different adipate and citrate esters were produced by a calendering-extrusion process. The incorporation of plasticizers significantly reduced the glass transition temperature and increased the PLA chain mobility thus improving the mechanical properties. Among the plasticizers employed, diethyl adipate significantly increased the elongation of the sheets and slightly increased the water vapor permeability. Micrographs revealed the incompatibility between starch and PLA, and there was no plasticizer phase separation, suggesting that the plasticizer concentration was adequate. The incorporation of adipate or citrate esters improves the mechanical properties and processability of PLA/TPS sheets produced by calendering extrusion at a pilot scale.

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Section: X-ray Diffractionsupporting

confidence: 81%

Adipate and Citrate Esters as Plasticizers for Poly(Lactic Acid)/Thermoplastic Starch Sheets

et al. 2014

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“…É possível que a concentração do mesmo tenha sido excessiva e que tenha atuado como plastificante como relatado em outros estudos (ABDILLAHI et al, 2013;CHABRAT et al, 2012;SHIRAI et al, 2016). De acordo com Wang et al (2010), o excesso de ácido também pode causar hidrólise das cadeias de amido e PLA comprometendo significativamente as propriedades mecânicas da blenda.…”

Section: Resultsunclassified

“…Diferentes estratégias de compatibilização encontram-se descritas na literatura, sendo a utilização de ácidos carboxílicos, como o ácido cítrico, uma delas (ABDILLAHI et al, 2013;WANG et al, 2010;CHABRAT et al, 2012). Em alguns estudos, a incorporação de ácido cítrico melhorou a interação entre as fases poliméricas do ATP e PLA por reação intercruzada (esterificação e ligação de hidrogênio), produzindo materiais com melhores propriedades mecânicas e de barreira ao vapor de água TEIXEIRA et al, 2012;WANG et al, 2010).…”

Section: Introductionunclassified

Production of starch/poly(lactic acid) sheets containing citric acid and tributyl citrate

et al. 2016

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Este trabalho teve como objetivo produzir laminados a partir de blendas de amido termoplástico e poli(ácido lático) (PLA) adicionados de citrato de tributila (TBC) e ácido cítrico por extrusão plana (calandragem). A adição de TBC e ácido cítrico reduziu a rigidez dos materiais e elevou a permeabilidade ao vapor de água (PVA) e a densidade. Isso ocorreu porque, provavelmente, estes compostos atuaram como plastificante para o PLA e amido. Com isso, concluiu-se que foi possível a produção de laminados de amido e PLA pelo processo de extrusão, mas estudos ainda são necessários para encontrar a concentração adequada de TBC e ácido cítrico que não comprometam de forma significativa as propriedades de barreira ao vapor de água.

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“…Schematic representation of a twin-screw extruder consisting of a bilobed barrel and two screws (case of the twin-screw extruder used as a liquid/solid extractor and separator). Colas et al, 2013aColas et al, , 2013b, (v) the extraction of polyphenolic extracts with antioxidant activity (Celhay et al, 2014), (vi) the enzymatic degradation of plant cell walls for the production of second generation bioethanol (Vandenbossche et al, , 2015(Vandenbossche et al, , 2016, (vii) the defibring of lignocellulosic materials for the production of paper pulp (Manolas et al, 1995;Maréchal and Rigal, 1999) and fiberboards (Markessini et al, 1997), (viii) the production of composite agromaterials with proteins (Leyris et al, 1998) or polysaccharides Peyrat et al, 2000;Rouilly, 2002;Jorda, 2003) used as the matrix, (ix) the production of thermoplastic agromaterials by compounding cereals and biobased and biodegradable polyesters (Chabrat et al, 2012;Abdillahi et al, 2013), and (x) the production of injectable biocomposites by compounding a biobased and biodegradable polyester, here used as a matrix, and vegetable fillers (Gamon et al, 2013).…”

Section: The Potential Of Twin-screw Processes For the Fractionation mentioning

confidence: 99%

The thermo-mechano-chemical twin-screw reactor, a new perspective for the biorefinery of sunflower whole plant: aqueous extraction of oil and other biopolymers, and production of biodegradable fiberboards from cake

Evon

Vandenbossche

Labonne

et al. 2016

OCL

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-Biorefinery of sunflower whole plant was performed successfully using a thermo-mechano-chemical twinscrew reactor. This led to the aqueous extraction of oil and other biopolymers like proteins, pectins and non pectic sugars. It resulted in the overall fractionation of biomass, thus allowing a complete valorization of the input. This biorefinery process was not only efficient but it was also environment-friendly. In addition, it contributed to the production of different end products for various industrial applications. Firstly, the hydrophilic phase will be recycled to the process. Secondly, the densest oil-in-water emulsion is a promising candidate for the formulation of cosmetic creams. Thirdly, the upper hydrophobic phase will be usable for the waterproofing treatment of the surface of agromaterials by coating. Its demixing will also lead to the production of proteins with tensioactive properties. These will serve for the food industry. Lastly, the cake was a mixture of plasticized proteins and lignocellulosic fibers. It was thus considered as a natural composite. Its molding into cohesive fiberboards was conducted successfully using both thermopressing and compression molding processes. The self-bonded boards with high density will be suitable for use as load bearing boards in dry conditions (floor underlayers, interior partitions, furniture, etc.). Positioned in walls and ceilings, boards with medium and low density will contribute to the heat insulation of buildings. In addition, the bulk cake will be also usable as a loose fill insulation material. As proposed, this flow chart thus allows a valorization for all fractions originating from the twin-screw reactor.Keywords: Biorefinery / twin-screw extruder / sunflower whole plant / thermo-mechano-chemical fractionation / aqueous extraction Résumé -Le réacteur thermo-mécano-chimique bi-vis, une nouvelle perspective pour le bioraffinage de la plante entière de tournesol : extraction aqueuse de l'huile et d'autres biopolymères, et production de panneaux de fibres biodégradables à partir du tourteau. Le bioraffinage du tournesol plante entière a été réalisé avec succès en utilisant un réacteur thermo-mécano-chimique bi-vis. Cela a permis l'extraction aqueuse de l'huile et d'autres biopolymères tels que des protéines, des pectines et des sucres non pectiques. Un fractionnement total de la biomasse a été obtenu, permettant ainsi une valorisation complète de la matière entrante. À la fois efficace et respectueuse de l'environnement, cette bioraffinerie a généré plusieurs produits finaux pour diverses applications industrielles. Tout d'abord, la phase hydrophile pourra être recyclée en tête de procédé. Puis, l'émulsion huile/eau la plus dense pourra être utilisée pour la formulation de crèmes cosmétiques. Pour sa part, la phase hydrophobe supérieure sera utilisable pour le traitement de surface des agromatériaux par enduction afin de les rendre moins sensibles à l'eau. Sa démixtion facilitera également l'obtention de protéines tensioactives, utilisables da...

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Influence of citric acid and water on thermoplastic wheat flour/poly(lactic acid) blends. I: Thermal, mechanical and morphological properties

Cited by 68 publications

References 26 publications

Adipate and Citrate Esters as Plasticizers for Poly(Lactic Acid)/Thermoplastic Starch Sheets

Adipate and Citrate Esters as Plasticizers for Poly(Lactic Acid)/Thermoplastic Starch Sheets

Production of starch/poly(lactic acid) sheets containing citric acid and tributyl citrate

The thermo-mechano-chemical twin-screw reactor, a new perspective for the biorefinery of sunflower whole plant: aqueous extraction of oil and other biopolymers, and production of biodegradable fiberboards from cake

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