Biotransformation of poly (epsilon-caprolactone) and poly (vinyl chloride) blend

Campos, Adriana de; Franchetti, Sandra Mara Martins; Agnelli, José Augusto Marcondes

doi:10.1590/s1517-83822003000500038

Cited by 8 publications

(4 citation statements)

References 8 publications

(7 reference statements)

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“…In another study about 3% reduction in the molar mass of pPVC (DOP) was observed after 3‐month soil burial experiment . The microorganism adherence brings some structural changes in PCL and PVC plastics having more carbonyl groups observed by UV–Vis spectrometer . The fungal isolates were found to be principal colonizer on the plasticized PVC film.…”

Section: Introductionmentioning

confidence: 92%

Isolation and molecular characterization of polyvinyl chloride (PVC) plastic degrading fungal isolates

Ali

Ahmed

Robson

et al. 2013

J. Basic Microbiol.

144

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The recalcitrant nature of polyvinyl chloride creates serious environmental concerns during manufacturing and waste disposal. The present study was aimed to isolate and screen different soil fungi having potential to biodegrade PVC films. After 10 months of soil burial experiment, it was observed that a number of fungal strains were flourishing on PVC films. On morphological as well as on 18rRNA gene sequence and phylogenetic basis they were identified as Phanerochaete chrysosporium PV1, Lentinus tigrinus PV2, Aspergillus niger PV3, and Aspergillus sydowii PV4. The biodegradation ability of these fungal isolates was further checked in shake flask experiments by taking thin films of PVC (C source) in mineral salt medium. A significant change in color and surface deterioration of PVC films was confirmed through visual observation and Scanning electron microscopy. During shake flask experiments, P. chrysosporium PV1 produced maximum biomass of about 2.57 mg ml(-1) followed by A. niger PV3. P. chrysosporium PV1 showed significant reduction (178,292 Da(-1)) in Molecular weight of the PVC film than control (200,000 Da(-1)) by gel permeation chromatography. Furthermore more Fourier transform infrared spectroscopy and nuclear magnetic resonance also revealed structural changes in the PVC. It was concluded that isolated fungal strains have significant potential for biodegradation of PVC plastics.

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Section: Introductionmentioning

confidence: 92%

Isolation and molecular characterization of polyvinyl chloride (PVC) plastic degrading fungal isolates

Ali

Ahmed

Robson

et al. 2013

J. Basic Microbiol.

144

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show abstract

“…The films of PVC, PCL, PET and PVC/PCL blend were obtained by the evaporation of solutions diluted in dichloroethane (Tedia) at 60°C, with manual agitation during approximately 1 h. After this procedure, they were put in Petri dishes, dried at room temperature for 2 days and for more 2 days under vacuum [13].…”

Section: Polymeric Films and Glass Surfacesmentioning

confidence: 99%

Wettability of Aqueous Rhamnolipids Solutions Produced by Pseudomonas aeruginosa LBI

Costa

Souza

Nitschke

et al. 2008

J Surfact & Detergents

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The wetting behavior of rhamnolipids produced by Pseudomonas aeruginosa LBI strain grown on waste oil substrate and sodium dodecyl sulfate (SDS) on glass, polyethylene terephthalate (PET), poly(vinyl chloride) (PVC), poly(e-caprolactone) (PCL) and polymer blend (PVC-PCL) was investigated by the measuring contact angle of sessile drops, to determine the wetting characteristics of rhamnolipids. The comparison of the wetting profiles showed that at low SDS and rhamnolipid concentrations, the contact angle increased and when the concentration of the surfactant increased further, the contact angle decreased. The blend surface (PVC-PCL) showed better wettability than the homopolymers themselves and the blend changed the surface hydrophobicity of the polymer, making it more hydrophilic. The rhamnolipids produced by the LBI strain exhibited superior wetting abilities than the chemical surfactant SDS one. This is the first work that evaluates the wetting properties of rhamnolipids on polymer blends.

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“…It can be utilized by micro-organism as a reserved material at the time of its need (13). As it has material properties (Molecular weight, Melting temperature, Glass transition temperature) similar to synthetic polymers (24), it is trusted to triumph over the problems and harmful effects of plastic wastes (3,16,22).…”

Section: Introductionmentioning

confidence: 99%

Production and characterization of PHA from recombinant E. coli harbouring phaC1 gene of indigenous Pseudomonas sp. LDC-5 using molasses

Saranya¹,

Shenbagarathai²

2011

Braz. J. Microbiol.

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Polyhydroxyalkanoates (PHA) are biodegradable and biocompatible green thermoplastics, synthesized by wide variety of bacteria as an intracellular carbon and energy storage intermediate. They are used as an alternative to nonrenewable petroleum derived plastics. The current interest in these biopolyesters is stimulated by the search for cost-effective capitalized production. This paper attempts to achieve maximized production rate from recombinant system using inexpensive substrate. Molasses from agro-industrial waste was used to produce PHA from recombinant E.coli in batch culture. PHA yield in molasses (3.06g/L ± 0.05-75.5%) was higher than that of sucrose (2.5g/L ± 0.05 - 65.1%). Properties of the polymer produced from molasses and sucrose were analyzed by DSC, TGA, DTA, GC/MS, TLC and optical rotation studies. The findings suggested that molasses enhanced PHA production in recombinant E.coli

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Biotransformation of poly (epsilon-caprolactone) and poly (vinyl chloride) blend

Cited by 8 publications

References 8 publications

Isolation and molecular characterization of polyvinyl chloride (PVC) plastic degrading fungal isolates

Isolation and molecular characterization of polyvinyl chloride (PVC) plastic degrading fungal isolates

Wettability of Aqueous Rhamnolipids Solutions Produced by Pseudomonas aeruginosa LBI

Production and characterization of PHA from recombinant E. coli harbouring phaC1 gene of indigenous Pseudomonas sp. LDC-5 using molasses

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