Surface composition and morphology of poly(3-hydroxybutyrate) exposed to biodegradation

Corrêa, Maria Clara Silveira; Rezende, M.L.; Rosa, Derval dos Santos; Agnelli, José Augusto Marcondes; Nascente, P. A. P.

doi:10.1016/j.polymertesting.2008.01.007

Cited by 54 publications

(28 citation statements)

References 16 publications

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“…In Figure 2c, can be observed the occurrence of flaking, which is well noted even though the smaller magnification (100 X) seeming to be further out of the film. This last ones indicates PHBV fraction biodegradation [30] and similar to the biodegradation of polypropylene/poly(hydroxide butyrate) blends treated in a polluted river water [24] .The Figure 3 shows the changes on the PHBV surface. After the biotreatment (Figures 3b), is evident the presence of spores and hyphae adhered to the polymer, forming a layer on it.…”

Section: Resultsmentioning

confidence: 52%

Biodegradation of films of low density polyethylene (LDPE), poly(hydroxibutyrate-co-valerate) (PHBV), and LDPE/PHBV (70/30) blend with Paecilomyces variotii

2015

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SbstractThe increased consumption of plastics in the world has been a subject of great concern and special attention by the scientific community. The aim is to promote development of materials that are biodegradable in a shorter time upon disposal in the environment. The most used synthetic plastics are difficult to biodegrade because they are made of long hydrocarbon chains, such as polyethylene (PE), polypropylene (PP), poly(vinyl chloride) (PVC), which are hydrophobic and resistant to the action of microbial enzymes. The use of alternative materials (natural polyesters) can minimize the harm to dumps and landfills upon their disposal, because they are susceptible to the action of microorganisms. In this study we evaluated the biodegradation/biodeterioration of PHBV (poly(3-hydroxybutyrate-co-hydroxyvalerate) films, LDPE (low density polyethylene) and the blend of LDPE/PHBV (70/30) by the fungus Paecilomyces variotii, using different methods: optical microscopy (OM), scanning electronic microscopy (SEM) and Fourier Transform Infrared spectroscopy (FTIR).

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Section: Resultsmentioning

confidence: 52%

Biodegradation of films of low density polyethylene (LDPE), poly(hydroxibutyrate-co-valerate) (PHBV), and LDPE/PHBV (70/30) blend with Paecilomyces variotii

2015

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“…PHAs shows suitable barrier properties against different organic solvents 115,116,126 and possess low oxygen and CO 2 permeability 65,77,[126][127][128][129] . Sanchez-Garcia et al reported lower water vapour permeability for PHB compared to PHBV 122 . The impact of crystallinity on permeability properties of PHAs is discussed 93,115,120,130,131 .…”

Section: Permeabilitymentioning

confidence: 96%

“…Besides, solubility and diffusivity of water in PHAs is a key factor for their degradation via enzymatic or non-enzymatic hydrolysis [120][121][122] . The water transport properties of PHB and PHBV films and their blends with other biodegradable polymers in different process conditions are reported 65,94,[115][116][117]120,121,[123][124][125] .…”

Section: Permeabilitymentioning

confidence: 99%

Application of Poly(hydroxyalkanoate) In Food Packaging: Improvements by Nanotechnology

Khosravi‐Darani¹

2015

Chem.Biochem.Eng.Q.

129

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The environmental impact of plastic usage is of critical concern and too great to repair. A shift toward biodegradable food packaging is one option. The aim of this review paper is the study of the potential of biodegradable materials for food packaging. The main characteristics in relation to food usage can be narrowed down to mass transfer (gas and water vapor), thermal and mechanical properties. Among several kinds of biodegradable polymers, poly(hydroxyalkanoate) is one of the favorable candidates for food packaging due to its physical and mechanical properties, biodegradability, with low permeability for O 2 , H 2 O and CO 2 without residues of catalysts and water solubility. The main focus of this article is to address poly(hydroxyalkanoate) as a potential candidate for food packaging. The need of applying biobased polymers in food packaging is presented in the introduction of this study. We also describe the most common biopolymers providing a brief overview of classification and application. This is followed by an outline of biopolymer production and a main section in which the properties of poly(hydroxybutyrate)-based nanocomposites of greatest relevance to food packaging are discussed. Furthermore, several approaches for improvement of poly(hydroxybutyrate) properties are described and the role of nanotechnology to improve its mechanical properties is presented. Finally, the article concludes with a summary as well as some possible future trends.

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“…This route uses the β-butyrolactone as reagent [23]. In this process, zinc and aluminum can be used as catalysts [32] and the polymer obtained shall possess chiral center in configuration in both R, as in S, being the last named PHB racemic compound [36]. Another method of obtaining is through natural plants and/or transgenic plants [11].…”

Section: Phb Synthesismentioning

confidence: 99%

“…This only occurs, however, when the material is exposed to environments biologically active [30] (soils, sea water or fresh water and aerobic and anaerobic composting), which are environments in which the material is in contact with degrading microorganisms [31]. It can also be mentioned the activated sludge as another environment proper to the degradation of PHB [32] and the sanitary landfill, in which the material may be discarded without impact to the environment [6].…”

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confidence: 99%

From Obtaining to Degradation of PHB:Material Properties. Part I

et al. 2017

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This paper presents a review of the chemical, physical and morphological characteristics, as well as the existing applications and mechanisms for the production of poly (3-hydroxybutyrate). This biopolymer, which is obtained from renewable sources, degrades when exposed in biologically active environments and is biocompatible, that is, it is not rejected by the human body in health applications. However, in spite of presenting similar properties with some conventional plastics, the PHB exhibits fragile behavior and thermal instability when processed. The literature proposes the use of blends, the development of copolymers or the insertion of additives in an attempt to improve the mechanical and thermal properties of PHB. Key words: Biopolymers; polyhydroxyalkanoates (PHA); Polyhydroxybutyrate (PHB). Universidad EAFIT 269|From Obtaining to Degradation of PHB: Material Properties. Part I De la obtención a la degradación de PHB: Propiedades del material. Parte I ResumenEste artículo presenta una revisión de las características químicas, físicas y morfológicas, así como las aplicaciones y mecanismos existentes para la producción de poli(3-hidroxibutirato). Este biopolímero, que se obtiene a partir de fuentes renovables, se degrada cuando se expone en ambientes biológicamente activos y es biocompatible, es decir, no es rechazado por el cuerpo humano en aplicaciones de salud. Sin embargo, a pesar de presentar propiedades similares con algunos plásticos convencionales, el PHB exhibe comportamiento frágil e inestabilidad térmica cuando se procesa. La literatura propone el uso de mezclas, el desarrollo de copolímeros o la inserción de aditivos en un intento por mejorar las propiedades mecánicas y térmicas del PHB.Palabras clave: Biopolímeros; degradación de PHB; polihidroxialcanoato (PHA); polihidroxibutirato (PHB).

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Surface composition and morphology of poly(3-hydroxybutyrate) exposed to biodegradation

Cited by 54 publications

References 16 publications

Biodegradation of films of low density polyethylene (LDPE), poly(hydroxibutyrate-co-valerate) (PHBV), and LDPE/PHBV (70/30) blend with Paecilomyces variotii

Biodegradation of films of low density polyethylene (LDPE), poly(hydroxibutyrate-co-valerate) (PHBV), and LDPE/PHBV (70/30) blend with Paecilomyces variotii

Application of Poly(hydroxyalkanoate) In Food Packaging: Improvements by Nanotechnology

From Obtaining to Degradation of PHB:Material Properties. Part I

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