Study of the behavior of biodegradable starch/polyvinyl alcohol/rosin blends

Domene-López, Daniel; Guillén, M.M.; Martı́n-Gullón, Ignacio; García‐Quesada, J.C.; Montalbán, Mercedes G.

doi:10.1016/j.carbpol.2018.08.137

Cited by 68 publications

(35 citation statements)

References 45 publications

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“…This finding means that liquefied product acts as a better plasticizer for starch than glycerol under the test conditions of this study. Similar results for mechanical properties of starch-based composites plasticized with glycerol elaborated by compression molding method have been reported by several authors, 25,32,33 considering the starch type, its eventual modification, plasticizer type and content and conditions of storage.…”

Section: Tensile Properties Analysissupporting

confidence: 89%

Liquefaction of corn husks and properties of biodegradable biopolyol blends

Briones¹,

Rodríguez²,

Labidi

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUND: A valorization route of corn husks from agrarian practices was performed by liquefaction using glycerol as liquefaction solvent to obtain biopolyols used as bioadditives in starch blends with the aim to find a useful industrial application in polymer processing. RESULTS: Low-molecular-weight liquefied products obtained from a practically total conversion reaction can be used for composite formulations (OH number, 310 mg KOH g −1 ; viscosity, 3.4 Pa s; molecular weight, 549 g mol −1). Concurrently, starch thermoplastic blends using various proportions of biopolyol (40, 30 and 20 wt%) as plasticizer were produced with maximum torque and plasticization energy ranging from 3.4 to 15.1 Nm and from 1.7 to 9.1 Nm min −1. The starch/biopolyol (70/30) sheets obtained by thermopressing showed properties similar to those of controls (starch/glycerol: 70/30), such as sensitivity to environment, retrodegradation, biodegradability and density; however, mechanical properties exhibited better performance compared to controls (Young's modulus, 14 MPa; strain at break, 33%; tensile strength, 1.2 MPa), which indicates a material with major mechanical balance. CONCLUSIONS: The adequacy in the conversion of corn husks into biopolyols that could be used as improved biobased plasticizers to obtain biodegradable blends is revealed. Hence, this study demonstrates that liquefied corn husk residues are sustainable resources with suitable properties for polymer processing, which can be applied in bioplastics and be considered as a value-added feature.

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Section: Tensile Properties Analysissupporting

confidence: 89%

Liquefaction of corn husks and properties of biodegradable biopolyol blends

Briones¹,

Rodríguez²,

Labidi

et al. 2020

J of Chemical Tech & Biotech

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“…With increase in the content of 7H4MC in PS blend, T S and E b increases in PSC I and PSC II films. These observations are in good agreement with the results reported by Domene-Lopez et al [51]. These maxima in both T S and E b could be attributed to the strong interaction between the hydroxyl groups of PVA and OMS with the hydroxyl groups of 7H4MC intermolecular hydrogen bonding (Fig.…”

Section: The Effect Of 7h4mc On Mechanical Properties Of Pva/omssupporting

confidence: 93%

Mechanical, optical and antioxidant properties of 7-Hydroxy-4-methyl coumarin doped polyvinyl alcohol/oxidized maize starch blend films

et al. 2020

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In the present study, the different weight ratios of 7-hydroxy-4-methyl coumarin (7H4MC) mixed polyvinyl alcohol (PVA)/ oxidized maize starch (OMS) blend films were achieved by the solvent casting method and coded as PSC. The prepared film samples were characterized by employing techniques such as FTIR, UTM, and SEM. The film samples were also subjected to their wettability, biodegradation and migration rate studies. Experimental outcomes showed that strong intermolecular hydrogen bonding between components of the blend films contribute to increase the mechanical properties, smoother surface morphology, increase in surface hydrophobicity, improvement in biodegradability, and exhibited migration rates below the overall migration limit (OML). Furthermore, moisture content, density, optical properties, water absorption, water solubility, water vapour transmission rate and antioxidant properties are discussed in detail. With all these properties, PVA/OMS/7H4MC blend films have the potential to use as packaging material.

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“…Amylose is a linear macromolecule of (1→4)-linked α-D-glucopyranosyl units slightly branched by (1→6)-αlinkages, while amylopectin is a highly branched macromolecule composed of hundreds of short (1→4)-α-glucan chains interlinked by (1→6)-linkages [11,12]. The relative weight ratio of these molecules depends on the botanical origin of the starch and, according to recent studies, could be important in the final properties of starch-based applications [13,14]. Properties of the final starch films can be also influenced by the starch molecular weight.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Comparative study on properties of starch films obtained from potato, corn and wheat using 1-ethyl-3-methylimidazolium acetate as plasticizer

Domene-López

Delgado-Marín

Martı́n-Gullón

et al. 2019

International Journal of Biological Macromolecules

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Starch films are gaining attention as substitutes of synthetic polymers due to their biodegradability and low cost. Some ionic liquids have been postulated as alternatives to glycerol, one of the best starch plasticizers, due to their great capacity to form hydrogen bonds with starch and hence great ability of preventing starch retrogradation and increasing film stability. In this work, [emim + ][Ac-]-plasticized starch films were prepared from potato, corn and wheat starch. The effect of starch molecular structure in terms of granular composition (amylose and phosphate monoester contents) and molecular weight (Mw) on film properties was evaluated. Potato starch films were the most amorphous because of the higher Mw and phosphate monoester content of potato starch, both contributing to a lower rearrangement of the starch chains difficulting the crystallization process. In contrast, corn and wheat starches lead to more crystalline films because of their lower Mw, which may imply higher mobility and crystal growth rate, and lower phosphate monoester content. This more crystalline structure could be the responsible of their better mechanical properties. [emim + ][Ac-] can be considered suitable for manufacturing starch films showing corn and wheat starch films similar properties to synthetic low-density polyethylene, but involving a simple and environmentally-friendly process.

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Study of the behavior of biodegradable starch/polyvinyl alcohol/rosin blends

Cited by 68 publications

References 45 publications

Liquefaction of corn husks and properties of biodegradable biopolyol blends

Liquefaction of corn husks and properties of biodegradable biopolyol blends

Mechanical, optical and antioxidant properties of 7-Hydroxy-4-methyl coumarin doped polyvinyl alcohol/oxidized maize starch blend films

Comparative study on properties of starch films obtained from potato, corn and wheat using 1-ethyl-3-methylimidazolium acetate as plasticizer

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