Production, optimization and characterization of polyhydroxybutyrate, a biodegradable plastic by <i>Bacillus</i> spp.

Bhagowati, Pabitra; Pradhan, Swastik; Dash, Hirak Ranjan; Das, Surajit

doi:10.1080/09168451.2015.1034651

Cited by 70 publications

(50 citation statements)

References 34 publications

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“…For these reasons, the use of both conventional and new ad hoc synthesized polymers is continuously increasing. Subsequently, million tons of plastic wastes are generated every year with a remarkable negative effect on environment contamination . This fact, together with the petroleum depletion has led to a growing interest in research on environmentally friendly polymers with the main aim of obtaining low environmental impact materials with similar physical and chemical properties to those of conventional petroleum‐based polymer such as polyethylene, polypropylene, or others .…”

Section: Introductionmentioning

confidence: 99%

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Improvement of Mechanical Ductile Properties of Poly(3-hydroxybutyrate) by Using Vegetable Oil Derivatives

Garcia‐Garcia

Fenollar

Fombuena

et al. 2016

Macromol. Mater. Eng.

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Poly(3‐hydroxybutyrate), P3HB is a thermoplastic polyester synthesized from bacterial fermentation with potential uses in packaging due to its biodegradability. Nevertheless, P3HB is a fragile material and its processing temperature window is very narrow which restricts its use. This study explores the potential of vegetable oil‐derived plasticizers, i.e., maleinized linseed oil (MLO) and an epoxidized fatty acid ester (EFAE) in the 5–20 phr range as environmentally friendly solutions for P3HB industrial formulations with improved toughness. The results show that optimum balance between ductile properties is achieved with low plasticizer content (5 phr) for both plasticizer types. Elongation at break and the impact resistance are increased by 28 and 71% respectively after addition of 5 phr MLO. With regard to EFAE, the elongation at break is improved by 40% and the impact resistance is increased to twice the value of P3HB. Another effect that both plasticizers provide is the thermal stabilization with a delay in the onset degradation temperature.

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Section: Introductionmentioning

confidence: 99%

“…P3HB offers a high melt temperature in the 175–180 °C range and a high crystallinity that can be higher than 55% . Additionally, it degrades to carbon dioxide and water by natural microbial mineralization . However, its extensive use at industrial scale is restricted because of some drawbacks.…”

Section: Introductionmentioning

confidence: 99%

Improvement of Mechanical Ductile Properties of Poly(3-hydroxybutyrate) by Using Vegetable Oil Derivatives

Garcia‐Garcia

Fenollar

Fombuena

et al. 2016

Macromol. Mater. Eng.

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“…Environment concerns and solid waste management problems increased the interest toward development of biodegradable plastics that possess the same physical and chemical properties of the conventional plastics (Bhagowati et al, 2015). The optimization work in this study has given a potent organism for PHB degradation.…”

Section: Optimization Of Medium Composition and Inoculums Level By mentioning

confidence: 99%

Degradation of Poly-β-hydroxybutyrate BY Trichoderma asperellum

Alhazmi¹,

Ghanem²,

Ahwany³

et al. 2018

JEBAS

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In this work, sequential optimization strategy, based on statistical designs, was employed to enhance the degradation of PHB by Trichoderma asperellum through the measurement of PHB depolymerase specific activity. For PHB degradation screening, two-level Plackett-Burman design was used. Result of study revealed that fermentation medium composition significantly influencing the PHB depolymerase specific activity. Further, it was reported that time of incubation, levels of PHB and concentration of glucose were found to be the major factors influencing the enzyme specific activity. A second threelevel Box-Behnken design was applied to acquire the best process conditions for PHB depolymerase specific activity. In this study, the initial basal medium showed a PHB depolymerase specific activity of 40 ng / l / hr / g dry wt and through the two successive statistical design, the final level of PHB depolymerase specific activity was 3230 ng / l / hr / g drywt, this means a nearly of 80 fold increase.

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“…PHA [92] Oceanimonas sp. PHA [93] Bacillus megaterium PHA [94] Bacillus sp. PHB [94] PHB Shewanella sp.…”

Section: Bacillus Megaterium Phb [90]mentioning

confidence: 99%

“…PHA [93] Bacillus megaterium PHA [94] Bacillus sp. PHB [94] PHB Shewanella sp. PHB [95] After that, several researchers studied the PHB production from marine bacteria; for example, Oliver and Colwell (1973) Pandian et al first attempted the use of raw sea water as a source of minerals as well as key nutrient for PHB production, which is an easily available cheapest source for bacteria growth [85].…”

Section: Bacillus Megaterium Phb [90]mentioning

confidence: 99%