Processing and Properties of Starch-Based Thermoplastic Matrix for Green Composites

Ribba, Laura; Lorenzo, Maria Cecilia; Tupa, Maribel; Melaj, Mariana A.; Eisenberg, Patricia; Goyanes, Silvia

doi:10.1007/978-981-15-9643-8_4

Cited by 5 publications

(4 citation statements)

References 171 publications

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“…A wide plethora of biocompostable polymers, such as polylactic acid [ 4 , 5 ], starch-based polymers [ 6 , 7 ], and polyhydroxyalkanoates [ 8 , 9 ] were proposed as suitable materials for biocompostable composites preparation. In this context, poly (butylene adipate-co-terephthalate) (PBAT) is an aliphatic/aromatic copolyester, fully biodegradable, that can be adopted for several applications, including agricultural and food-packaging [ 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

PBAT Based Composites Reinforced with Microcrystalline Cellulose Obtained from Softwood Almond Shells

et al. 2021

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This study explores the processability, mechanical, and thermal properties of biocompostable composites based on poly (butylene adipate-co-terephthalate) (PBAT) as polymer matrix and microcrystalline cellulose (MCC) derived from softwood almond (Prunus dulcis) shells (as-MCC) as filler at two different weight concentration, i.e., 10 wt% and 20 wt%. The materials were processed by melt mixing and a commercial MCC (c-MCC) was used as filler comparison. The fibrillar shape of as-MCC particles was found to change the rheological behavior of PBAT, particularly at the highest concentration. The melt mixing processing allowed obtaining a uniform dispersion of both kinds of fillers, slightly reducing the L/D ratio of as-MCC fibers. The as-MCC particles led to a higher increase of the elastic modulus of PBAT if compared to the c-MCC counterparts. Both the MCC fillers caused a drastic reduction of the elongation at break, although it was higher than 120% also at the highest filler concentrations. DSC analysis revealed that both MCC fillers poorly affected the matrix crystallinity, although as-MCC induced a slight PBAT crystallinity increase from 8.8% up to 10.9% for PBAT/as-MCC 20%. Therefore, this work demonstrates the great potential of MCC particles derived from almond shells as filler for biocompostable composites fabrication.

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Section: Introductionmentioning

confidence: 99%

PBAT Based Composites Reinforced with Microcrystalline Cellulose Obtained from Softwood Almond Shells

et al. 2021

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“…Sustainable composites made from renewable materials, waste, and biopolymer matrices are of particular interest as they have the potential to reduce environmental impacts and support an efficient circular economy [ 7 ]. Several biopolymers, such as polylactic acid (PLA) [ 8 ], starch-based polymers [ 9 ], or polyhydroxyalkanoates [ 10 ], have been proposed as suitable materials for biocomposites’ preparation. Furthermore, biocomposites made from biopolymers and natural fibers are very attractive because they can be disposed of effortlessly after fulfilling their purpose without adversely affecting the environment [ 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Biobased Films Based on Chitosan and Microcrystalline Cellulose for Sustainable Packaging Applications

Di Liberto,

Dintcheva

2024

Polymers

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The transition to a more sustainable lifestyle requires a move away from petroleum-based sources and the investigation and funding of renewable and waste feedstocks to provide biobased sustainable materials. The formulation of films based on chitosan and microcrystalline cellulose with potential applications in the packaging sector has been demonstrated. Glycerol is also used as a plasticizer in the formulation of flexible films, while mucic acid is used as a valid alternative to acetic acid in such films. The film based on chitosan, microcrystalline cellulose, glycerol, and mucic acid shows properties and a performance similar to those of the film formulated with acetic acid, and, in addition, it seems that the photo-oxidation resistance of the film based on mucic acid is better than that of the material containing acetic acid. The films were characterized using spectroscopy (FTIR and UV-vis), tensile testing, water contact angle measurements, surface observations, and photo-oxidation resistance measurements. The presence of microcrystalline cellulose enhances the mechanical behavior, UV barrier properties, and surface hydrophobicity of the film. The feasibility of formulating chitosan-based films, with or without microcrystalline cellulose, which exhibit good properties and performances is demonstrated. Mucic acid instead of acetic acid is used in the formulation of these film.

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“…Starch offers several advantages as being low cost, abundant, renewable, and biodegradable, in addition to the fact that it can be processed by conventional industrial techniques such as extrusion, injection, and compression molding. Nevertheless, poor mechanical and water barrier properties have limited its application [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Biodegradable Composite Materials based on Cassava Starch and Reinforced with Topinambur (Helianthus tuberosus) Aerial Part Fiber

Fernanda Sierra Montes,

Andrea Melaj,

Cecilia Lorenzo

et al. 2023

Sustainable Polymer &Amp; Energy

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The cultivation of topinambur (Helianthus tuberosus) has aroused the interest of producers since it is a source of inulin and can be used for biofuel production. During tuber processing, the aerial part of the crop remains as a by-product with no practical application. This work aimed to characterize the fibers obtained from the aerial part of topinambur and to evaluate their reinforcing potential in cassava starch-based films. Starch-based films with topinambur fiber (0, 5, and 10%) were prepared by extrusion followed by thermocompression. Topinambur residue contains 88.6% of total fiber, 8.5% ash, and 0.68% lipid. Mechanical film properties evidenced the reinforcement action of topinambur fiber, 10% content was able to increase up to 70% the Young's modulus. SEM micrographs evidenced the good fibermatrix interaction. UV-visible capacity, opacity, and chromaticity parameters of TPS films increased with fiber content in the formulation. Fiber incorporation improved the hydrophobicity of the biocomposite materials by increasing the contact angle. Starch-based films biodegraded more than 55% after 110 days, showing a similar trend to that of microcrystalline cellulose. Thus, topinambur residue can be effectively used as a reinforcing agent for TPS materials, being an innovative and non-toxic additive within the circular economy premises.

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Processing and Properties of Starch-Based Thermoplastic Matrix for Green Composites

Cited by 5 publications

References 171 publications

PBAT Based Composites Reinforced with Microcrystalline Cellulose Obtained from Softwood Almond Shells

PBAT Based Composites Reinforced with Microcrystalline Cellulose Obtained from Softwood Almond Shells

Biobased Films Based on Chitosan and Microcrystalline Cellulose for Sustainable Packaging Applications

Biodegradable Composite Materials based on Cassava Starch and Reinforced with Topinambur (Helianthus tuberosus) Aerial Part Fiber

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