Modification and Potential Application of Short-Chain-Length Polyhydroxyalkanoate (SCL-PHA)

Wang, Shichao; Chen, Wei; Xiang, Hengxue; Yang, Junjie; Zhu, Zhe

doi:10.3390/polym8080273

Cited by 95 publications

(38 citation statements)

References 164 publications

(197 reference statements)

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“…The crystallinity of P(3HB-co-3HV) is maintained at 60% or higher regardless of the fraction of 3HV monomer present in copolymer chain (Holmes, 1988). The high crystallinity of P(3HB-co-3HV) is due to the isodimorphism behavior of this copolymer, whereby the transformation of crystallization from the P(3HB) lattice to the P(3HV) lattice occurs at around 37-40 mol% 3HV (Kunioka et al, 1989;Liu et al, 2014;Wang et al, 2016). At this fraction of 3HV, both the 3HB and 3HV monomers, which are similar in size, can co-crystallize into the same lattice (Doi, 1990;Grigore et al, 2019).…”

Section: P(3hb-co-3hv)mentioning

confidence: 99%

Can Polyhydroxyalkanoates Be Produced Efficiently From Waste Plant and Animal Oils?

Surendran

Lakshmanan

Chee

et al. 2020

Front. Bioeng. Biotechnol.

111

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Polyhydroxyalkanoates (PHAs) are a potential replacement for some petrochemical-based plastics. PHAs are polyesters synthesized and stored by various bacteria and archaea in their cytoplasm as water-insoluble inclusions. PHAs are usually produced when the microbes are cultured with nutrient-limiting concentrations of nitrogen, phosphorus, sulfur, or oxygen and excess carbon sources. Such fermentation conditions have been optimized by industry to reduce the cost of PHAs produced commercially. Industrially, these biodegradable polyesters are derived from microbial fermentation processes utilizing various carbon sources. One of the major constraints in scaling-up PHA production is the cost of the carbon source metabolized by the microorganisms. Hence, cheap and renewable carbon substrates are currently being investigated around the globe. Plant and animal oils have been demonstrated to be excellent carbon sources for high yield production of PHAs. Waste streams from oil mills or the used oils, which are even cheaper, are also used. This approach not only reduces the production cost for PHAs, but also makes a significant contribution toward the reduction of environmental pollution caused by the used oil. Advancements in the genetic and metabolic engineering of bacterial strains have enabled a more efficient utilization of various carbon sources, in achieving high PHA yields with specified monomer compositions. This review discusses recent developments in the biosynthesis and classification of various forms of PHAs produced using crude and waste oils from the oil palm and fish industries. The biodegradability of the PHAs produced from these oils will also be discussed.

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Section: P(3hb-co-3hv)mentioning

confidence: 99%

Can Polyhydroxyalkanoates Be Produced Efficiently From Waste Plant and Animal Oils?

Surendran

Lakshmanan

Chee

et al. 2020

Front. Bioeng. Biotechnol.

111

View full text Add to dashboard Cite

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“…Indeed, it also improves its mechanical performance in terms of stiffness as well as thermal resistance [ 11 ]. On the other hand, in order to enhance the toughness of PHBV, several attempts have been reported in the literature, some of them related to blending with other polymers such as poly(butylene adipate-co-terephthalate) (PBAT) [ 12 , 13 ], polybutylene succinate (PBS) [ 14 , 15 ], or polycaprolactone (PCL) [ 12 ] or by the addition of impact modifiers such as ethylene vinyl acetate [ 16 ], epoxidized natural rubber [ 13 , 17 ], or thermoplastic polyurethane (TPU) [ 12 , 18 , 19 , 20 ], showing in all cases great improvements in elongation at break.…”

Section: Introductionmentioning

confidence: 99%

Toughness Enhancement of PHBV/TPU/Cellulose Compounds with Reactive Additives for Compostable Injected Parts in Industrial Applications

Sánchez-Safont

Arrillaga

Anakabe

et al. 2018

IJMS

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Poly(3-hydroxybutyrate-co-3-valerate), PHBV, is a bacterial thermoplastic biopolyester that possesses interesting thermal and mechanical properties. As it is fully biodegradable, it could be an alternative to the use of commodities in single-use applications or in those intended for composting at their end of life. Two big drawbacks of PHBV are its low impact toughness and its high cost, which limit its potential applications. In this work, we proposed the use of a PHBV-based compound with purified α-cellulose fibres and a thermoplastic polyurethane (TPU), with the purpose of improving the performance of PHBV in terms of balanced heat resistance, stiffness, and toughness. Three reactive agents with different functionalities have been tested in these compounds: hexametylene diisocianate (HMDI), a commercial multi-epoxy-functionalized styrene-co-glycidyl methacrylate oligomer (Joncryl® ADR-4368), and triglycidyl isocyanurate (TGIC). The results indicate that the reactive agents play a main role of compatibilizers among the phases of the PHBV/TPU/cellulose compounds. HMDI showed the highest ability to compatibilize the cellulose and the PHBV in the compounds, with the topmost values of deformation at break, static toughness, and impact strength. Joncryl® and TGIC, on the other hand, seemed to enhance the compatibility between the fibres and the polymer matrix as well as the TPU within the PHBV.

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“…Rubber toughening is one of the traditional approaches to improve toughness in brittle polymers consisting in the incorporation of a secondary dispersed elastomeric phase that acts as an impact modifier increasing the impact‐absorbed energy of the resin . This strategy has been recently applied in PHBV matrices using ethylene–vinyl acetate, epoxidized natural rubber, poly(butadiene‐ co ‐acrylonitrile), or thermoplastic polyurethane (TPU) as the secondary elastomeric phase showing improvements in elongation at break and impact strength in different extents. In this work, an ester‐based TPU was studied as elastomer.…”

Section: Introductionmentioning

confidence: 99%

PHBV/TPU/cellulose compounds for compostable injection molded parts with improved thermal and mechanical performance

Sánchez-Safont

Arrillaga

Anakabe

et al. 2018

J of Applied Polymer Sci

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Poly(hydroxybutyrate‐co‐valerate) (PHBV) is a biopolymer that has gained a lot of attention because of its biodegradability, good thermal resistance, and balanced mechanical properties with respect to some commodity plastics. However, it presents two big limitations that hinder its potential application in replacing plastics for rigid injected parts: high cost and low toughness. Aiming at overcoming these limitations, the use of two additives in a PHBV matrix was explored: thermoplastic polyurethane (TPU) as an impact modifier and cellulose as reinforcing filler. Compounds of PHBV with different TPUs and cellulose contents were prepared by extrusion and, subsequently, injection molding. The morphology, thermal, and mechanical properties of the so‐obtained materials were analyzed. Also, the biodisintegrability under standard composting conditions of the studied compositions was also assessed. The results of this work show that the obtained PHBV/TPU/cellulose compounds are biodisintegrable and show balanced properties in terms of thermal resistance–stiffness–toughness. These properties point these compounds as potential candidates to replace commodities in rigid part applications that require biodisintegration in their end‐of‐life, being able to be processed in a conventional injection molding industrial facility. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47257.

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Modification and Potential Application of Short-Chain-Length Polyhydroxyalkanoate (SCL-PHA)

Cited by 95 publications

References 164 publications

Can Polyhydroxyalkanoates Be Produced Efficiently From Waste Plant and Animal Oils?

Can Polyhydroxyalkanoates Be Produced Efficiently From Waste Plant and Animal Oils?

Toughness Enhancement of PHBV/TPU/Cellulose Compounds with Reactive Additives for Compostable Injected Parts in Industrial Applications

PHBV/TPU/cellulose compounds for compostable injection molded parts with improved thermal and mechanical performance

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