Biodegradable Bicomponent Fibers from Renewable Sources: Melt‐Spinning of Poly(lactic acid) and Poly[(3‐hydroxybutyrate)<i>‐co‐</i>(3‐hydroxyvalerate)]

Hufenus, Rudolf; Reifler, Felix A.; Maniura‐Weber, Katharina; Spierings, Adriaan B.; Zinn, Manfred

doi:10.1002/mame.201100063

Cited by 88 publications

(58 citation statements)

References 63 publications

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“…2a1-a2). This is consistent with literature [48] that PHBV contributed little to the strength of the PHBV/PLA core/sheath fibers and can be associated with severe degradation and low molecular orientation [25,48,49]. Indeed, it was confirmed in this work that the M w decreases ca.…”

Section: Spinnabilitysupporting

confidence: 94%

“…Meanwhile, the f c of PHBV changes less and somehow irregularly with take-up speed. Compared with that of PLA, the f c of PHBV is much lower (≤0.83) even in the drawn fibers, which was also observed in literature [39,48], resulting in inferior tensile properties. In fact, the properties of the PHBV or PHB fibers would not be improved unless the highly extended β-form crystal was formed under certain conditions [56][57][58][59].…”

Section: Orientationsupporting

confidence: 67%

“…In fact, the properties of the PHBV or PHB fibers would not be improved unless the highly extended β-form crystal was formed under certain conditions [56][57][58][59]. According to the thermogravimetric analysis (TGA) (data not shown here) which was used to distinguish between PLA and PHBV [22,48], the residues are composed of ca. 80% to 95%…”

Section: Orientationmentioning

confidence: 99%

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Properties and structure of polylactide/poly (3-hydroxybutyrate-co-3-hydroxyvalerate) (PLA/PHBV) blend fibers

Huang

Wang

et al. 2015

Polymer

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Section: Spinnabilitysupporting

confidence: 94%

Section: Orientationsupporting

confidence: 67%

Section: Orientationmentioning

confidence: 99%

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Properties and structure of polylactide/poly (3-hydroxybutyrate-co-3-hydroxyvalerate) (PLA/PHBV) blend fibers

Huang

Wang

et al. 2015

Polymer

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“…Foams with various cell densities were produced from PLA/PHBV and PLA/PHBV/clay blends using microcellular injection molding technique [20]. Bicomponent PLA/PHBV fibers were prepared using bicomponent melt spinning [21]. In vitro biocompatibility studies with human dermal fibroblasts demonstrated no toxicity of the fibers making them promising for medical applications.…”

mentioning

confidence: 99%

Polylactide/poly(hydroxybutyrate-co-hydroxyvalerate) blends: Morphology and mechanical properties

Gérard¹,

Budtova²,

Podshivalov³

et al. 2014

Express Polym. Lett.

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International audienceThe morphology and the mechanical properties of polylactide/poly(hydroxybutyrate-co-hydroxyvalerate) blends of various compositions were studied. The statistical analysis of the scanning electron microscopy images allowed finding two statistical ensembles of the minor-phase particles. The first ensemble involves the dispersed particles, whereas the second one contains the coalesced particles. The mean diameters of both dispersed and coalesced minor-phase particles were calculated and plotted against the blend composition. Young's modulus, tensile strength, elongation at break, and Charpy impact strength of the blends were determined and examined as a function of the blend composition. The Young's modulus values were shown to be in accordance with theoretical predictions

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“…In vitro biocompatibility studies did not show any toxicity and cells grew along the length of the fibers. A decrease in fiber strength by about 33 % was observed 4 weeks after incubation [12Huf]. Blends of PHBV and PLA were prepared and extruded into fibers between 210 and 235 C. Blend fibers containing 5 and 10 % PHBV were knitted into socks [11Piv] shown in Fig.…”

mentioning

confidence: 99%

Fibers from Polyhdroxyalkanoates and Its Derivatives and Blends

Reddy

Yang

2014

Innovative Biofibers From Renewable Resources

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KeywordsBacterial polyester • Poly(3-hydroxybutyrate) • PLA • Core-sheath fiber • Knitted socksPolyhydroxyalkonates are a diverse family of biopolyester produced by bacteria as energy and carbon storage materials. Poly(3-hydroxybutyrate) (PHB) is the most common type of PHA that is commercially used. PHB is an thermoplastic material with a melting temperature of about 180 C and glass temperature that is below room temperature. Structure and properties of PHB are highly dependent on the conditions prevailing during fiber production. For instance, slow cooling from the melt produced large spherulites and rapid cooling results in amorphous state [01Yam]. It was suggested that PHB assumed orthorhombic or α-form or the β-zigzag form depending on the annealing conditions. PHB crystallized into orthorhombic form when annealed under high tension and into β-zigzag form when annealed under high tension [01Yam]. Based on X-ray diffraction patterns, it was found that the amorphous molecules transformed into orthorhombic crystal when annealed without tension and when annealed under tension, the amorphous regions were stretched and crystallized into the β-form [01Yam].Polyhydroxybutyrate-valerate (PHBV) is a copolymer of PHB that is less stiffer but tougher than PHB. However, the low crystallization rate of PHBV makes it difficult to produce fibers. To overcome this limitation, PHBV was blended with PLA to produce core-sheath fibers. PHBV with a viscosity average molecular weight of 490 kDa was extruded to obtain pellets with lower molecular weight of 260 kDa and PLA was reduced to a molecular weight of about 90 kDa, and the two polymers were blended and extruded into fibers. Table 65.1 lists the conditions used and the properties of the fibers obtained. As seen in the table, it was not possible to obtain fibers with PHBV as the sheath and PLA as the core due to poor processability of PHBV. Tensile properties of the fibers were dependent on the draw ratio and to the amount of PLA in the blend. Biocomponent fibers with PLA as the sheath and

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Biodegradable Bicomponent Fibers from Renewable Sources: Melt‐Spinning of Poly(lactic acid) and Poly[(3‐hydroxybutyrate)‐co‐(3‐hydroxyvalerate)]

Cited by 88 publications

References 63 publications

Properties and structure of polylactide/poly (3-hydroxybutyrate-co-3-hydroxyvalerate) (PLA/PHBV) blend fibers

Properties and structure of polylactide/poly (3-hydroxybutyrate-co-3-hydroxyvalerate) (PLA/PHBV) blend fibers

Polylactide/poly(hydroxybutyrate-co-hydroxyvalerate) blends: Morphology and mechanical properties

Fibers from Polyhdroxyalkanoates and Its Derivatives and Blends

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