Biorefinery concept in the meat industry: From slaughterhouse biowastes to superaborbent materials

Álvarez‐Castillo, Estefanía; Guerrero, Pedro; Caba, Koro de la; Bengoechea, Carlos; Guerrero, Antonio

doi:10.1016/j.cej.2023.144564

Cited by 2 publications

(2 citation statements)

References 45 publications

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“…Opposite to this behaviour, SPI-based bioplastics did not exhibit significant differences for the first recycling cycle; however, it increased after five recycling cycles, which suggests some hardening of the samples caused by the loss of plasticity observed in TGA experiments. The values of E obtained for these bioplastics were similar to porcine plasma in the case of SPI and whole blood-based bioplastics in the case of Zein [41]. The ε Max values were 0.02 and 0.8 mm/mm for Zein and SPI-based bioplastics, respectively, confirming the higher plastic deformation for SPI/Gly bioplastics.…”

Section: Characterisation Of Bioplasticssupporting

confidence: 61%

“…This technique shows the weight change in the bio-based materials studied in this work as a function of temperature, evidencing the weight loss of the samples that are more marked at different temperatures. As may be observed, the TGA profile for Zein/Gly initially shows a smooth weight loss starting at about 50 • C, associated with the small amount of water present (either adsorbed on the surface), which is followed by a rather steeper loss, displaying a marked peak at 50 • C in the derivative signal [41]. This peak is slightly more evident for Zein-based bioplastics, and remained even after processing by injection moulding, indicating that water is not completely eliminated after the processing conditions.…”

Section: Characterisation Of Bioplasticsmentioning

confidence: 71%

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Effect of Recycling on Thermomechanical Properties of Zein and Soy Protein Isolate Bioplastics

Alsadat-Seyedbokaei,

Felix,

Bengoechea

2024

Processes

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Bioplastics are an alternative to reduce the environmental damage caused by petroleum-based plastics. However, the effect of primary recycling (reprocessing) of bioplastics from biomass resources has not yet been well studied. If successful, this would boost the landing of recyclable and biodegradable bio-based materials to the market. In order to meet the challenge of recycling bioplastics, it is necessary to study the reprocessing of bio-based materials that potentially behave as thermoplastics. This study investigated the primary recyclability of Zein- and soy protein isolate (SPI)-based bioplastics by reprocessing. Protein powders were initially mixed with glycerol (Gly), which acts as a plasticizer, and the blends were subjected to injection moulding. Initial specimens were reprocessed by injection moulding up to five times. The effect of reprocessing was evaluated by dynamic mechanical analysis (DMA), tensile test, and water uptake capacity (WUC). Finally, the property–structure relationship was assessed by scanning electron microscopy (SEM). The results showed that the recycled SPI-based bioplastics reduced elongation at break (i.e., ɛMax decreased from 0.8 to 0.3 mm/mm), whereas the parameters from tensile tests did not decrease upon recycling for Zein-based bioplastics (p < 0.05). The results obtained confirm that it is possible to reprocess protein-based bioplastics from two different renewable sources while maintaining the mechanical properties, although the loss of Gly was reflected in tensile tests and WUC. These results highlight the possibility of replacing petroleum-based plastics with bio-based materials that can be recycled, which reduces dependence on natural biopolymers and contributes to sustainable development.

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Section: Characterisation Of Bioplasticssupporting

confidence: 61%

Section: Characterisation Of Bioplasticsmentioning

confidence: 71%