Manufacturing of PHA as Fibers

Iwata, Tadahisa; Tanaka, Toshihisa

doi:10.1007/978-3-642-03287-5_11

Cited by 12 publications

(5 citation statements)

References 41 publications

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“…31 Like nylon, PHAs can be processed into fibers in for textiles. 45 PHAs are polyesters which can be easily stained and may be used in printing and photographic industry. 46,47 PHAs are biodegradable and biocompatible, therefore, can be developed into implant materials (cardiovascular patches, articular cartilage, bone marrow scaffolds, etc.)…”

Section: Polyhydroxyalkanoate Applicationsmentioning

confidence: 99%

Bioplastics from waste glycerol derived from biodiesel industry

Zhu

Chiu

Nakas

et al. 2013

J of Applied Polymer Sci

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Polyhydroxyalkanoates (PHAs) are polyesters that can be biologically synthesized by many microorganisms and engineered plants that have been investigated by microbiologists, biochemists, polymer scientists, material engineers, and medical researchers for several decades. Research on microbial production of PHAs has been extensively focused on using pure carbon sources, such as sugars and fatty acids. Practical considerations of production costs of PHAs have resulted in research efforts to use alternative renewable and inexpensive feedstocks. One potential feedstock for the production of PHA polymers is the glycerol waste byproduct of biodiesel production. The major focus of this review is the production of PHA polymers from glycerol. A review of biosynthetic pathways for PHAs production from glycerol, current production of waste glycerol in biodiesel industry, physical and mechanical properties of PHAs, and applications of PHAs in the areas of packaging industry, implant materials, drug carrier, biofuels, are covered.

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Section: Polyhydroxyalkanoate Applicationsmentioning

confidence: 99%

Bioplastics from waste glycerol derived from biodiesel industry

Zhu

Chiu

Nakas

et al. 2013

J of Applied Polymer Sci

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“…Poly(3-hydroxybutyrate) (PHB, −[−CH(CH 3 )CH 2 COO−] n −) is one of the representative biodegradable polymers produced naturally by microorganisms. − The crystal structure is the most important basic knowledge for the study of the structure–physical property of this polymer from the microscopic point of view. PHB is known to crystallize into two crystal modifications, that is, the α-form and the β-form. − …”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, the details of the crystal structure of the β-form have not yet been determined. The β-form is obtained by applying a tensile force to the oriented α-form. − However, the transition does not occur completely, and the α- and β-forms coexist even in the sample tensioned strongly just before the occurrence of the breakage. − The reason for such an incomplete transition behavior must be understood from the structural point of view, including the higher-order structural change.…”

Section: Introductionmentioning

confidence: 99%

X-ray Crystal Structure Analysis of Poly(3-hydroxybutyrate) β-Form and the Proposition of a Mechanism of the Stress-Induced α-to-β Phase Transition

Phongtamrug

Tashiro

2019

Macromolecules

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The crystal structure of poly(3-hydroxybutyrare) β crystal form has been analyzed on the basis of two-dimensional X-ray diffraction data. The all-trans zigzag chains are packed in the hexagonal unit cell of a = b = 9.22 Å, c (chain axis) = 4.66 Å, and γ = 120° with the space group P3221. The upward and downward chains are statistically located at one lattice site at 50% probability. By combining the thus-analyzed structure information of the β-form with the previously reported structure information of the α-form, the geometrical relation between these two crystalline phases has been clarified in detail. The tension-induced α-to-β phase transition affects the higher-order structural change, as known from the small-angle X-ray scattering (SAXS) data collected in the tensile deformation process. By analyzing all experimentally obtained wide-angle X-ray diffraction and SAXS data, the following transition model has been proposed: the high tension to the oriented sample causes the increase of the long period of the α-form lamellae. As the tensile force is increased, the local stress concentration starts to occur at the short tie chain segmental parts in the amorphous region sandwiched between the stacked lamellae. These highly tensioned tie chains induce the α-to-β structural change in both amorphous and directly connected crystalline regions and generate the 40 Å-wide bundles of zigzag chain segments passing through several neighboring lamellae along the draw direction. These bundles are repeated with the averaged period of about 90 Å in the lateral direction perpendicular to the draw axis. Further stretching causes the cut of the highly tensioned extended chain parts, resulting in the formation of voids and finally the breakage of the whole sample before the completion of the phase transition from the α- to β-form.

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“…They discovered that reducing the processing temperature (below the melting point of PHB, which is 170 • C) and increasing the take-up speed led to improved crystallization, primarily due to the orientation of α-crystals and the formation of β-crystals. It is widely recognized that the presence of a crystalline structure, particularly the planar-zigzag conformation of PHAs, enhances the mechanical properties of the fibers [160].…”

Section: Monocomponent Filaments and Fibersmentioning

confidence: 99%

A Review on Melt-Spun Biodegradable Fibers

Naeimirad,

Krins,

Gruter

2023

Sustainability

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The growing awareness of environmental issues and the pursuit of sustainable materials have sparked a substantial surge in research focused on biodegradable materials, including fibers. Within a spectrum of fabrication techniques, melt-spinning has emerged as an eco-friendly and scalable method for making fibers from biodegradable plastics (preferably bio-based), intended for various applications. This paper provides a comprehensive overview of the advancements in the realm of melt-spun biodegradable fibers. It delves into global concerns related to micro- and nanoplastics (MNPs) and introduces the concept of biodegradable fibers. The literature review on melt-spun biodegradable monofilaments and multifilaments unveils a diverse range of polymers and copolymers that have been subjected to testing and characterization for their processing capabilities and the performance of the resultant fibers, particularly from mechanical, thermal, and biodegradation perspectives. The paper discusses the impact of different factors such as polymer structure, processing parameters, and environmental conditions on the ultimate properties, encompassing spinnability, mechanical and thermal performance, and biodegradation, with schematic correlations provided. Additionally, the manuscript touches upon applications in sectors such as clothing, technical textiles, agriculture, biomedical applications, and environmental remediation. It also spotlights the challenges encountered in the commercialization of these fibers, addresses potential solutions, and outlines future prospects. Finally, by shedding light on the latest developments, challenges, and opportunities in the field, this review endeavors to stimulate further innovation and adoption of biodegradable fibers. It seeks to unlock their potential and contribute to the realization of a more environmentally conscious society.

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Manufacturing of PHA as Fibers

Cited by 12 publications

References 41 publications

Bioplastics from waste glycerol derived from biodiesel industry

Bioplastics from waste glycerol derived from biodiesel industry

X-ray Crystal Structure Analysis of Poly(3-hydroxybutyrate) β-Form and the Proposition of a Mechanism of the Stress-Induced α-to-β Phase Transition

A Review on Melt-Spun Biodegradable Fibers

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