Effect of different polyols as plasticizers in soy based bioplastics

Aguilar, José Manuel Ruano; Bengoechea, Carlos; Pérez, Eva María Domínguez; Guerrero, Antonio

doi:10.1016/j.indcrop.2020.112522

Cited by 25 publications

(17 citation statements)

References 32 publications

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“…Mild moulding temperatures are the main factor for promoting the superabsorbent properties of an injection-moulded material [ 7 , 36 ], as the injection pressure exerts a lesser effect [ 37 ]. A plasticizer is needed to ease the processing of blends containing biopolymers as it enhances the plasticity of the materials and facilitates the injection process [ 38 , 39 ]. Glycerol (Gly), the most frequently used plasticizer for proteins and polysaccharides, possesses a high hydrophilicity and is highly miscible with water.…”

Section: Introductionmentioning

confidence: 99%

Rheology and Water Absorption Properties of Alginate–Soy Protein Composites

et al. 2021

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Composite materials based on proteins and carbohydrates normally offer improved water solubility, biodegradability, and biocompatibility, which make them attractive for a wide range of applications. Soy protein isolate (SPI) has shown superabsorbent properties that are useful in fields such as agriculture. Alginate salts (ALG) are linear anionic polysaccharides obtained at a low cost from brown algae, displaying a good enough biocompatibility to be considered for medical applications. As alginates are quite hydrophilic, the exchange of ions from guluronic acid present in its molecular structure with divalent cations, particularly Ca2+, may induce its gelation, which would inhibit its solubilization in water. Both biopolymers SPI and ALG were used to produce composites through injection moulding using glycerol (Gly) as a plasticizer. Different biopolymer/plasticizer ratios were employed, and the SPI/ALG ratio within the biopolymer fraction was also varied. Furthermore, composites were immersed in different CaCl2 solutions to inhibit the amount of soluble matter loss and to enhance the mechanical properties of the resulting porous matrices. The main goal of the present work was the development and characterization of green porous matrices with inhibited solubility thanks to the gelation of alginate.

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Section: Introductionmentioning

confidence: 99%

Rheology and Water Absorption Properties of Alginate–Soy Protein Composites

et al. 2021

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“…Since the surfaces degree of hydrophobicity is important to ensure good barrier properties, the evaluation of WVP, OP, and WCA is demanded. Recently, Aguilar et al [ 96 ] found that different physical and mechanical properties could be achieved at room temperature for bioplastics based on a soy protein isolated as a byproduct of the soy oil industry and added with different polyols, i.e., s (glycerol (GLY), ethylene glycol (EG), diethylene glycol (DEG) and triethylene glycol (TEG). In this sense, TEG-bioplastics were opaque, brittle, and also had a higher water uptake capacity, while EG-bioplastics were more ductile and translucent, absorbing much less water when immersed.…”

Section: Bioplastics: Definition and Classificationmentioning

confidence: 99%

Natural Polymeric Materials: A Solution to Plastic Pollution from the Agro-Food Sector

Acquavia

Pascale²,

Martelli

et al. 2021

Polymers

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Conventional petroleum-derived plastics represent a serious problem for global pollution because, when discarded in the environment, are believed to remain for hundreds of years. In order to reduce dependence on fossil resources, bioplastic materials are being proposed as safer alternatives. Bioplastics are bio-based and/or biodegradable materials, typically derived from renewable sources. Food waste as feedstock represents one of the recent applications in the research field of bioplastics production. To date, several food wastes have been used as raw materials for the production of bioplastics, including mostly fruit and vegetable wastes. The conversion of fruit and vegetable wastes into biomaterials could occur through simple or more complex processes. In some cases, biopolymers extracted from raw biomass are directly manufactured; on the other hand, the extracted biopolymers could be reinforced or used as reinforcing agents and/or natural fillers in order to obtain biocomposites. The present review covers available results on the application of methods used in the last 10 years for the design of biomaterials obtained from formulations made up with both fruits and vegetables by-products. Particular attention will be addressed to the waste pre-treatment, to the bioplastic formulation and to its processing, as well as to the mechanical and physical properties of the obtained materials.

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“…Several studies have highlighted that changes in the mold temperature (and/or in the holding time at which the blend is exposed) can modulate the final properties of the product [ 17 , 95 , 97 , 121 , 160 ], modifying the water uptake capacity and rheological and mechanical properties [ 32 , 59 , 97 , 159 ]. Different protein sources have been injection-molded, such as soy [ 18 , 58 , 59 , 62 , 161 , 162 , 163 , 164 , 165 , 166 , 167 , 168 ], sunflower [ 77 ], albumen [ 155 , 160 ], porcine plasma [ 95 , 96 , 97 ], pea [ 121 , 159 ], whey [ 144 ], rice [ 169 ], or gluten [ 32 , 35 , 170 ].…”

Section: Processing Of Bio-based Materialsmentioning

confidence: 99%

Proteins from Agri-Food Industrial Biowastes or Co-Products and Their Applications as Green Materials

Álvarez‐Castillo¹,

Félix²,

Bengoechea³

et al. 2021

Foods

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A great amount of biowastes, comprising byproducts and biomass wastes, is originated yearly from the agri-food industry. These biowastes are commonly rich in proteins and polysaccharides and are mainly discarded or used for animal feeding. As regulations aim to shift from a fossil-based to a bio-based circular economy model, biowastes are also being employed for producing bio-based materials. This may involve their use in high-value applications and therefore a remarkable revalorization of those resources. The present review summarizes the main sources of protein from biowastes and co-products of the agri-food industry (i.e., wheat gluten, potato, zein, soy, rapeseed, sunflower, protein, casein, whey, blood, gelatin, collagen, keratin, and algae protein concentrates), assessing the bioplastic application (i.e., food packaging and coating, controlled release of active agents, absorbent and superabsorbent materials, agriculture, and scaffolds) for which they have been more extensively produced. The most common wet and dry processes to produce protein-based materials are also described (i.e., compression molding, injection molding, extrusion, 3D-printing, casting, and electrospinning), as well as the main characterization techniques (i.e., mechanical and rheological properties, tensile strength tests, rheological tests, thermal characterization, and optical properties). In this sense, the strategy of producing materials from biowastes to be used in agricultural applications, which converge with the zero-waste approach, seems to be remarkably attractive from a sustainability prospect (including environmental, economic, and social angles). This approach allows envisioning a reduction of some of the impacts along the product life cycle, contributing to tackling the transition toward a circular economy.

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Effect of different polyols as plasticizers in soy based bioplastics

Cited by 25 publications

References 32 publications

Rheology and Water Absorption Properties of Alginate–Soy Protein Composites

Rheology and Water Absorption Properties of Alginate–Soy Protein Composites

Natural Polymeric Materials: A Solution to Plastic Pollution from the Agro-Food Sector

Proteins from Agri-Food Industrial Biowastes or Co-Products and Their Applications as Green Materials

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