Biosynthesis and biocompatibility of biodegradable poly(3-hydroxybutyrate-co-4-hydroxybutyrate)

Chanprateep, Suchada; Buasri, Ketsunee; Muangwong, Aumtiga; Utiswannakul, Phonpisit

doi:10.1016/j.polymdegradstab.2010.07.014

Cited by 91 publications

(86 citation statements)

References 27 publications

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“…P(3HB:3HV) with the 3HV content varying on or after 5-70 mol% has the T m going down from 170 to 87°C, respectively. A similar trend is observed in case of T g for these polymers that declined from 2.25 to -13°C, respectively [65,74,79]. T g for pure PHB is 2.5-10°C while it goes down to -16°C in case of P(3HB:3HV) with 90 mol% 3HV content ( Table 2).…”

Section: Thermal Propertiessupporting

confidence: 79%

“…Under N-limiting conditions 4HB precursors flux goes to 3HB-CoA, thus more 3HB is incorporated into polymer P(3HB:4HB) by C. necator. Thus, under different C/N level varying range of 4HB (0-94 mol %) was attained [74]. Similar results of increasing 3HV and 4HB content with an increasing C/N ratio was also observed.…”

Section: Culture Conditionssupporting

confidence: 76%

“…169 and -2°C in comparison to P(3HB:38 % 4HB) i.e. 152 and -10°C, respectively [74]. Interestingly, P(3HB:3HHx) with 3HHx equal to 10-12 mol% has quite lower values (T m : 96-127°C) in comparison to P(3HB:10-20 % 3HV) (T m : 137-156°C) and P(3HB:16 % 4HB) (T m : 150°C) having relatively similar content of 3HB.…”

Section: Thermal Propertiesmentioning

confidence: 90%

“…Since, N-rich conditions induce higher growth of cells and incorporation of 4HB, it increases the PDI as compared to that observed for PHA produced under N-limitation. C. necator produced PHA with M w of 5.2 9 10 2 kDa when cultivated under high C/N ratio, which improved to 8.2 9 10 2 kDa under low C/N ratio [74]. In contrast, M w of PHA obtained with Azohydromonas lata declined with decreasing C/N and C/P ratio.…”

Section: Culture Conditionsmentioning

confidence: 95%

“…Interestingly, P(3HB:3HHx) with 3HHx equal to 10-12 mol% has quite lower values (T m : 96-127°C) in comparison to P(3HB:10-20 % 3HV) (T m : 137-156°C) and P(3HB:16 % 4HB) (T m : 150°C) having relatively similar content of 3HB. This may be due the presence of mcl-HA 3HHx [7,8,30,65,74,80]. Tercopolymer P(3HB:3HV:4HB) with higher 3HB content e.g.…”

Section: Thermal Propertiesmentioning

confidence: 99%

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Challenges and Opportunities for Customizing Polyhydroxyalkanoates

et al. 2015

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Polyhydroxyalkanoates (PHAs) as an alternative to synthetic plastics have been gaining increasing attention. Being natural in their origin, PHAs are completely biodegradable and eco-friendly. However, consistent efforts to exploit this biopolymer over the last few decades have not been able to pull PHAs out of their nascent stage, inspite of being the favorite of the commercial world. The major limitations are: (1) the high production cost, which is due to the high cost of the feed and (2) poor thermal and mechanical properties of polyhydroxybutyrate (PHB), the most commonly produced PHAs. PHAs have the physicochemical properties which are quite comparable to petroleum based plastics, but PHB being homopolymers are quite brittle, less elastic and have thermal properties which are not suitable for processing them into sturdy products. These properties, including melting point (T m ), glass transition temperature (T g ), elastic modulus, tensile strength, elongation etc. can be improved by varying the monomeric composition and molecular weight. These enhanced characteristics can be achieved by modifications in the types of substrates, feeding strategies, culture conditions and/or genetic manipulations.

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Section: Thermal Propertiessupporting

confidence: 79%

Section: Culture Conditionssupporting

confidence: 76%

Section: Thermal Propertiesmentioning

confidence: 90%

Section: Culture Conditionsmentioning

confidence: 95%

Section: Thermal Propertiesmentioning

confidence: 99%

See 3 more Smart Citations

Challenges and Opportunities for Customizing Polyhydroxyalkanoates

et al. 2015

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A Review on PHAs: The Future Biopolymer

Mohapatra

Vishwakarma

Joshi

et al. 2021

Environmental and Agricultural Microbiology

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Rheological, thermal, and mechanical properties of P (3HB‐co‐4HB) and P (3HB‐co‐4HB)/EVA blends

Guo

Liu

et al. 2014

J of Applied Polymer Sci

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Poly(3‐hydroxybutyrate‐co‐4‐hydroxybutyrate) [P(3HB‐co‐4HB)] fiber and P(3HB‐co‐4HB)/EVA fiber were obtained by single screw extrusion machine. The rheology of P(3HB‐co‐4HB) and P(3HB‐co‐4HB)/EVA blends was characterized by capillary rheometer, and the chemical groups of the blends were characterized with Fourier transform infrared spectroscopy (FT‐IR). The crystallization behavior and thermal, mechanical and elastic properties of the fibers were measured by differential scanning calorimeter (DSC), thermogravimetric analyzer (TGA) and single fiber strength tester, respectively. Besides, the moisture regain and drying shrinkage rates of the fibers were tested. These results showed that P(3HB‐co‐4HB)/EVA blends have better flowability, crystallinity, and thermal stability than P(3HB‐co‐4HB) fiber. The fracture strength of the P(3HB‐co‐4HB)/EVA fiber decreases with increasing the EVA content, but the elongation at break shows the contrary tendency. The rebound resilience ratio of P(3HB‐co‐4HB)/EVA fiber reaches 100%. Both moisture regain and drying shrinkage increase first and then decrease with increasing the EVA content. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 41206.

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Biosynthesis and biocompatibility of biodegradable poly(3-hydroxybutyrate-co-4-hydroxybutyrate)

Cited by 91 publications

References 27 publications

Challenges and Opportunities for Customizing Polyhydroxyalkanoates

Challenges and Opportunities for Customizing Polyhydroxyalkanoates

A Review on PHAs: The Future Biopolymer

Rheological, thermal, and mechanical properties of P (3HB‐co‐4HB) and P (3HB‐co‐4HB)/EVA blends

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