Aligned plasticized polylactic acid cellulose nanocomposite tapes: Effect of drawing conditions

Singh, Avinash; Geng, Shiyu; Herrera, Natalia; Oksman, Kristiina

doi:10.1016/j.compositesa.2017.10.019

Cited by 46 publications

(59 citation statements)

References 36 publications

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“…Other authors (Singh et al, 2018) also confirmed by x-ray diffraction analysis that the crystallinity of drawn PLA was higher than the undrawn material. Cicero et al (2002) showed that drawing leads to molecular orientation and crystallization develops where microfibrils are aligned along the fiber axis.…”

Section: Pla Filamentsmentioning

confidence: 77%

“…Where H m is the melting enthalpy, H cc is the cold crystallization enthalpy, H mo is the melting enthalpy for 100% crystalline PLA (93 J/g) (Eling et al, 1982;Singh et al, 2018) and w is the weight fraction of PLA in the sample.…”

Section: Methodsmentioning

confidence: 99%

“…However, the transformation of PLA into textile structures is very complex and depends on the polymer structural changes derived from processing (Gupta et al, 2007). Orientation as a result of drawing of PLA under appropriate conditions can be strongly affected by several material properties (Singh et al, 2018). For example, Mai et al (2015) reported that the mechanical properties of drawn PLA tapes significantly depend on the draw ratio and the drawing temperature.…”

Section: Introductionmentioning

confidence: 99%

“…For example, Mai et al (2015) reported that the mechanical properties of drawn PLA tapes significantly depend on the draw ratio and the drawing temperature. Modulus, strength and toughness can be improved by the strain-induced crystallization as well as the orientation promoted by drawing (Mai et al, 2015;Singh et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Solid-State Drawing of Commercial Poly(Lactic Acid) (PLA) Based Filaments

et al. 2019

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In the present work, solid-state drawing of commercial PLA-based extruded filaments was investigated. Two different filaments were used: one based on neat PLA and the other based on PLA filled with copper particles. The effect of the processing parameters such as the drawing temperature and the draw ratio on the materials morphology and thermal and mechanical behavior was analyzed. A specially designed device which simulates the solid-stated drawing stage frequently used for fibers manufacturing was applied. The drawing effects were evidenced by the results of the degree of crystallinity and tensile parameters, as well as by SEM analysis and topographical observations of the surfaces of the filaments. From these results, it was concluded that the draw ratio is more important than the drawing temperature as a determining factor of the tensile performance of the PLA-based filaments investigated. However, the drawing temperature plays a key role to establish the critical draw ratio to obtain stable solid-state drawing.

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Section: Pla Filamentsmentioning

confidence: 77%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Solid-State Drawing of Commercial Poly(Lactic Acid) (PLA) Based Filaments

et al. 2019

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“…In this regard, the composite is often prepared by melt compounding technique (e.g. extrusion, followed by melt compression to form films) and the films obtained were cut into rectangular strips and then exposed to uniaxial solid-state drawing by using a tensile tester, equipped with a temperature chamber [68,69]. It was recognized that the solid-state drawing, effectively orientated both the polymer and the reinforcements and hence, leading to a better organized molecular structure with increased crystallinity, which in turn, affected the mechanical and thermal properties of the resulting composite products, depending on the draw temperature, draw speed, draw ratio and the amount of reinforcement [69].…”

Section: Solid State Drawingmentioning

confidence: 99%

Processing of Thermoplastic PLA/Cellulose Nanomaterials Composites

Mokhena¹,

Sefadi²,

Sadiku³

et al. 2018

Preprint

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Over the past decades, research has escalated on the use of polylactic acid (PLA) as replacement for petroleum-based polymers. This is due to its valuable properties, such as renewability, biodegradability, biocompatibility and good thermomechanical properties. Despite possessing good mechanical properties comparable to conventional petroleum-based polymers, PLA suffers from some shortcomings such as low thermal resistance, heat distortion temperature and rate of crystallization, thus different fillers have been used to overcome these limitations. In the frame work of environmentally friendly processes and products, there has been growing interest on the use of cellulose nanomaterials viz. cellulose nanocrystals (CNC) and nanofibers (CNF) as natural fillers for PLA towards advanced applications other than short-term packaging and biomedical. Cellulosic nanomaterials are renewable in nature, biodegradable, eco-friendless and they possess high strength and stiffness. In the case of eco-friendly processes, various conventional processing techniques, such as melt extrusion, melt-spinning, and compression moulding, have been used to produce PLA composites. This review addresses the critical factors in the manufacturing of PLA-cellulosic nanomaterials by using conventional techniques and recent advances needed to promote and improve the dispersion of the cellulosic nanomaterials. Different aspects, including morphology, mechanical behavior and thermal properties, as well as comparisons of CNC- and CNF reinforced PLA, are also discussed

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Functional Materials from Nanocellulose: Utilizing Structure–Property Relationships in Bottom‐Up Fabrication

et al. 2020

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It is inherently challenging to recapitulate the precise hierarchical architectures found throughout nature (such as in wood, antler, bone, and silk) using synthetic bottom‐up fabrication strategies. However, as a renewable and naturally sourced nanoscale building block, nanocellulose—both cellulose nanocrystals and cellulose nanofibrils—has gained significant research interest within this area. Altogether, the intrinsic shape anisotropy, surface charge/chemistry, and mechanical/rheological properties are some of the critical material properties leading to advanced structure‐based functionality within nanocellulose‐based bottom‐up fabricated materials. Herein, the organization of nanocellulose into biomimetic‐aligned, porous, and fibrous materials through a variety of fabrication techniques is presented. Moreover, sophisticated material structuring arising from both the alignment of nanocellulose and via specific process‐induced methods is covered. In particular, design rules based on the underlying fundamental properties of nanocellulose are established and discussed as related to their influence on material assembly and resulting structure/function. Finally, key advancements and critical challenges within the field are highlighted, paving the way for the fabrication of truly advanced materials from nanocellulose.

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Aligned plasticized polylactic acid cellulose nanocomposite tapes: Effect of drawing conditions

Cited by 46 publications

References 36 publications

Solid-State Drawing of Commercial Poly(Lactic Acid) (PLA) Based Filaments

Solid-State Drawing of Commercial Poly(Lactic Acid) (PLA) Based Filaments

Processing of Thermoplastic PLA/Cellulose Nanomaterials Composites

Functional Materials from Nanocellulose: Utilizing Structure–Property Relationships in Bottom‐Up Fabrication

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