Recycling of Polylactide

Badia, José D.; Cháfer, Amparo; Teruel-Juanes, R.; Ribes‐Greus, A.

doi:10.1016/b978-0-12-803581-8.10569-7

Cited by 9 publications

(8 citation statements)

References 25 publications

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“…3,4 PLA is considered a feasible alternative for replacing petrochemical polymers, 4,5 due to its unique features such as transparency, mechanical properties, low toxicity, low cost, and controlled biodegradability. 6,7 Indeed, it offers high potential and advantages in a range of industrial applications, such as packaging or medical device fabrication. [8][9][10] However, the intrinsic chain rigidity may become a disadvantage, given the low chain mobility, which may result in low tensile elongation at break and low toughness, limiting its applicability in its pure state.…”

Section: Introductionmentioning

confidence: 99%

Poly (lactic acid)/D‐limonene/ZnO bio‐nanocompositeswith antimicrobial properties

Sepúlveda

Rivera

Loyo

et al. 2021

J of Applied Polymer Sci

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Antimicrobial films of poly (lactic acid) (PLA)/D‐limonene/zinc oxide (ZnO)‐based bio‐nanocomposites were prepared via melt compounding and subsequent thermocompression. D‐limonene was incorporated at concentrations of 10 or 20 wt%, and ZnO pure nanoparticles and those organically modified with oleic acid (O‐ZnO), with an average diameter of 13.5 nm, were included at concentrations of 3, 5, and 8 wt%. The plasticizing effect of D‐Limonene was corroborated by a decrease in the glass transition temperature compared to pure PLA. The presence of ZnO and O‐ZnO in the PLA matrix promoted a slight increase in the degree of crystallinity due to its nucleant performance. Although ZnO and O‐ZnO induced lower thermal stability and slightly decreased microhardness in the composites, excellent antimicrobial performance was demonstrated. Both ZnO and O‐ZnO nanocomposites reached 99.9% of effectiveness for nanoparticles content above 5 wt%, regardless of the source of irradiation, D‐limonene concentration, and nanoparticle modification. Therefore, these bio‐nanocomposites will allow for future advances in sustainable antimicrobial materials for the medical or food packaging fields.

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Section: Introductionmentioning

confidence: 99%

Poly (lactic acid)/D‐limonene/ZnO bio‐nanocompositeswith antimicrobial properties

Sepúlveda

Rivera

Loyo

et al. 2021

J of Applied Polymer Sci

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“…Temperature, oxygen, humidity, mechanical stress, and light lead to thermo-mechanical biopolymer degradation, either individually or together [26]. Thermo-mechanical degradation involves oxidation, hydrolysis, and chain-cutting reactions that cause a decrease in molar mass and affect morphological properties in terms of amorphous-crystalline ratio, chirality, or steric rearrangement [27].…”

Section: A Mechanical Propertiesmentioning

confidence: 99%

The Effect of Multi-Extrusion Process of Polylactic Acid on Tensile Strength and Fracture Morphology of Filament Product

Syaifuddin

Suryanto²,

Suprayitno³

2021

JMEST

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Polylactic acid (PLA) is one of the most used materials in FDM 3D Printing. Large-scale consumption of PLA on an industrial scale could cause environmental and efficiency problems. Thus, PLA waste and industry waste need to be recycled to limit excessive waste. This study aimed to investigate the change in mechanical property, morphology, and structure of mechanically recycled PLA. Recycling was performed 12 times using the extrusion process with an extrusion temperature nozzle of 170°C. The SEM, structural analysis, and amorphous-crystalline analysis used XRD. The results showed a gradual decrease of tensile strength from each recycle with a total of 20% (13.22 MPa). The decrease percentage equalled the number of recycling. After the 9 th recycle, PLA experienced a drastic tensile strength decrease, in which the 12 th recycle tensile strength had a 14% (8.17 MPa) reduction. The morphology analysis of the tensile test sample presented significant morphology change, in which morphology defects such as void, flakes, and cracks appeared after the 6 th recycle. Although, until 12 times extrusion, it did not significantly affect the PLA phase shape. Mechanical recycle using a multi-extrusion process is not recommended exceeding six times.

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“…where mi is the initial dry mass and mr is the dry mass of the residual sample recovered from the sieve. Separation was performed with a Jordi Associates mixed bed fluorinated column with permeation range 100-10×10 6 Dalton. All the samples were dissolved in HFIP, which was also used as mobile phase containing 2.72 g•L -1 of sodium trifluoroacetate (NaTFA).…”

Section: Degradation Assaysmentioning

confidence: 99%

“…In an end-of-life framework, residues of such biopolyesters may have to be managed and valorised. Although recycling has been postulated as a feasible alternative in some cases [6,7],…”

Section: Introductionmentioning

confidence: 99%

Influence of substrate and temperature on the biodegradation of polyester-based materials: Polylactide and poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) as model cases

Cháfer

Andres-Puche

Domínguez

et al. 2020

Polymer Degradation and Stability

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Recycling of Polylactide

Cited by 9 publications

References 25 publications

Poly (lactic acid)/D‐limonene/ZnO bio‐nanocompositeswith antimicrobial properties

Poly (lactic acid)/D‐limonene/ZnO bio‐nanocompositeswith antimicrobial properties

The Effect of Multi-Extrusion Process of Polylactic Acid on Tensile Strength and Fracture Morphology of Filament Product

Influence of substrate and temperature on the biodegradation of polyester-based materials: Polylactide and poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) as model cases

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