Biodegradable green composites: It's never too late to mend

Rafiee, Kiana; Schritt, Helge; Pleißner, Daniel; Kaur, Guneet; Brar, Satinder Kaur

doi:10.1016/j.cogsc.2021.100482

Cited by 38 publications

(23 citation statements)

References 37 publications

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“…Combining biodegradable polymers with agricultural waste, marine waste or with industrial residues from wood processing, has gained particular interest in the view of producing composite materials with high mechanical performance [1][2][3][4][5]. Green composites, moreover, are considered an effective strategy for the reduction of environmental pollution related to plastic [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…The most commonly used biopolymeric matrices employed to obtain green composites are PLA, PCL, PBAT, cellulose and starch-based ones [1,6]. Mater-Bi ® (MB) is a family of commercial starch-based biopolymers that finds relevant applications in many fields thanks to its interesting mechanical properties, good thermal stability, excellent processability, full biodegradability and suitability to be reinforced with natural fibers, as reported in many studies [4,5,7,10].…”

Section: Introductionmentioning

confidence: 99%

“…Mater-Bi ® (MB) is a family of commercial starch-based biopolymers that finds relevant applications in many fields thanks to its interesting mechanical properties, good thermal stability, excellent processability, full biodegradability and suitability to be reinforced with natural fibers, as reported in many studies [4,5,7,10]. The addition of an organic filler to these matrices could accelerate their biodegradability [6,7] while enhancing mechanical performance [1,7,[11][12][13][14]. Potentially, all plant-based biomasses present peculiar characteristics that may help achieving both goals.…”

Section: Introductionmentioning

confidence: 99%

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Hedysarum coronarium-Based Green Composites Prepared by Compression Molding and Fused Deposition Modeling

et al. 2022

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In this work, an innovative green composite was produced by adding Hedysarum coronarium (HC) flour to a starch-based biodegradable polymer (Mater-Bi®, MB). The flour was obtained by grinding together stems, leaves and flowers and subsequently sieving it, selecting a fraction from 75 μm to 300 μm. Four formulations have been produced by compression molding (CM) and fused deposition modeling (FDM) by adding 5%, 10%, 15% and 20% of HC to MB. The influence of filler content on the processability was tested, and rheological, morphological and mechanical properties of composites were also assessed. Through CM, it was possible to obtain easily homogeneous samples with all filler amounts. Concerning FDM, 5% and 10% HC-filled composites proved also easily printable. Mechanical results showed filler effectively acted as reinforcement: Young’s modulus and tensile strengths of the composites increased from 74.3 MPa to 236 MPa and from 18.6 MPa to 33.4 MPa, respectively, when 20% of HC was added to the pure matrix. FDM samples, moreover, showed higher mechanical properties if compared with CM ones due to rectilinear infill and fibers orientation. In fact, regarding the 10% HC composites, Young’s modulus of the CM and FDM ones displayed a relative increment of 176% and 224%, respectively.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hedysarum coronarium-Based Green Composites Prepared by Compression Molding and Fused Deposition Modeling

et al. 2022

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“…The addition of agricultural or marine waste to biodegradable polymers has gained particular interest, in recent years, for the fabrication of ‘green’ composite materials with high mechanical performance [ 1 , 2 , 3 , 4 , 5 , 6 ]. Green composites, in fact, may play a key role in the reduction of environmental impact related to plastic [ 7 , 8 , 9 , 10 ]. Moreover, the addition of waste biomasses to a polymeric matrix may reduce the costs of the final product.…”

Section: Introductionmentioning

confidence: 99%

“…Polylactic acid (PLA), polycaprolactone (PCL), polybutylene adipate terephthalate (PBAT), cellulose, and starch-based ones are some of the most commonly employed biopolymeric matrices for green composite production [ 1 , 7 ]. Several studies have shown the suitability of PLA to be used together with a natural filler to produce green composites [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

Green Composites Based on Hedysarum coronarium with Outstanding FDM Printability and Mechanical Performance

et al. 2022

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The addition of natural scraps to biodegradable polymers has gained particular interest in recent years, allowing reducing environmental pollution related to traditional plastic. In this work, new composites were fabricated by adding 10% or 20% of Hedysarum coronarium (HC) flour to Poly (lactic acid) (PLA). The two formulations were first produced by twin screw extrusion and the obtained filaments were then employed for the fabrication of composites, either for compression molding (CM) or by fused deposition modeling (FDM), and characterized from a morphological and mechanical point of view. Through FDM it was possible to achieve dense structures with good wettability of the filler that, on the contrary, cannot be obtained by CM. The results indicate that the filler effectively acts as reinforcement, especially for FDM composites. The most remarkable enhancement was found in the flexural properties (+100% of modulus and ultimate strength), followed by tensile resistance and stiffness (+60%) and impact strength (+50%), whereas a moderate loss in tensile deformability was observed, especially at the highest loading. By adding HC to the polymeric matrix, it was possible to obtain a green, high-performance, and cost-effective composite, which could find applications for the fabrication of panels for furniture or the automotive industry.

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Development of sustainable cellulose‐based composite of polypropylene reinforced by recycled microfibrillar poly (ethylene terephthalate)

Khamseh,

Maroufkhani,

Moghanlou

et al. 2023

Polymer Composites

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Sustainable composites based on blends from polypropylene (PP) and recycled polyethylene terephthalate (RPET) and wood flour (WF) were prepared under industry‐relevant conditions by melt extrusion, followed by continuous drawing through spinnerets. Maleic anhydride grafted polypropylene (PP‐g‐MA) was employed to improve the compatibility between matrix and WF. The effects of incorporation of WF and RPET microstructure on the morphological features, rheological measurements, and mechanical properties were investigated. The drawing process converted elliptical RPET phase into highly oriented microfibrillar structure, as characterized by means of scanning electron microscopy (SEM). The highly oriented blend (HOB) represented nonterminal behavior due to the presence of physical networks and enhanced surface area of microfibers for chemical interactions. The tensile strength of neat PP increased by the addition of WF and the existence of microfibrillar RPET phase, whereas the microstructure of RPET had more pronounce effect. The tensile strength and elastic modulus of PP reinforced by WF and oriented RPET improved by 65% and 92%, respectively, demonstrating the high potential of this environmental‐friendly reinforcement method to intensify the mechanical properties of PP.

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Biodegradable green composites: It's never too late to mend

Cited by 38 publications

References 37 publications

Hedysarum coronarium-Based Green Composites Prepared by Compression Molding and Fused Deposition Modeling

Hedysarum coronarium-Based Green Composites Prepared by Compression Molding and Fused Deposition Modeling

Green Composites Based on Hedysarum coronarium with Outstanding FDM Printability and Mechanical Performance

Development of sustainable cellulose‐based composite of polypropylene reinforced by recycled microfibrillar poly (ethylene terephthalate)

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