Effect of hydrophilic and hydrophobic monomers grafting on microbial poly(3-hydroxybutyrate)

Hsieh, Wen‐Yuan; Wada, Yasuhiro; Mitobe, Tsutomu; Mitomo, Hiroshi; Seko, Noriaki; Tamada, Masao

doi:10.1016/j.jtice.2008.10.005

Cited by 17 publications

(7 citation statements)

References 14 publications

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“…Wada et al (17,18) also performed a similar work using PHB films; additionally, they reported biodegradability and saponification under different experimental conditions. Some other works have shown a similar trend, but not too many have reported experimental research about the structure of the graft copolymers (19,20).…”

Section: Introductionsupporting

confidence: 54%

Structure, mechanism and application of vinyl alcohol oligomers grafted onto poly(3-hydroxybutyrate): a proposal

et al. 2014

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Oligomers of poly(vinyl alcohol) were grafted onto poly(3-hydroxybutyrate) (PHB) by radiation-induced polymerization. The aim of this study was to elucidate the structure of these copolymers using nuclear magnetic resonance (heteronuclear multiple quantum coherence) spectroscopy supported by dynamic light scattering (DLS) and atomic force microscopy (AFM). It was concluded that vinyl alcohol (VA) was grafted onto PHB for the methylenic and methynic sites. A mechanism for the grafting reaction was proposed based on the experimental evidence. AFM and DLS allowed the characterization of the particles obtained from P(HB-g-VA). The prepared materials showed suitable properties for use in drug delivery systems.

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Section: Introductionsupporting

confidence: 54%

Structure, mechanism and application of vinyl alcohol oligomers grafted onto poly(3-hydroxybutyrate): a proposal

et al. 2014

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“…The melting temperature and the mechanical properties can be modified by changing the hydroxyvalerate unit content. The melting point of the copolymer, as well as the glass transition temperature and the crystallinity decrease as the hydroxyvalerate unit content increases [ 46 , 145 ]. The impact strength increases and the tensile strength decreases with an increase of the HV units [ 145 , 146 ].…”

Section: Biodegradable Polymers Derived From Renewable Resourcesmentioning

confidence: 99%

Biodegradable Polymers

2009

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Biodegradable materials are used in packaging, agriculture, medicine and other areas. In recent years there has been an increase in interest in biodegradable polymers. Two classes of biodegradable polymers can be distinguished: synthetic or natural polymers. There are polymers produced from feedstocks derived either from petroleum resources (non renewable resources) or from biological resources (renewable resources). In general natural polymers offer fewer advantages than synthetic polymers. The following review presents an overview of the different biodegradable polymers that are currently being used and their properties, as well as new developments in their synthesis and applications.

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“…Hsieh et al . investigated the effect of hydrophilic and hydrophobic monomers grafted onto PHB powder and concluded that the monomer with the hydrophilic chain improved PHB's biodegradability . The biodegradation of PHB and its nanocomposites with OMMT in compost media has been studied by Maiti et al ., who found that the presence of the nanoclay enhances the biodegradation rate of the pure polymer …”

Section: Resultsmentioning

confidence: 99%

Nanocomposites of poly(3‐hydroxybutyrate)/organomodified montmorillonite: Effect of the nanofiller on the polymer's biodegradation

Panayotidou

Baklavaridis

Zuburtikudis

et al. 2014

J of Applied Polymer Sci

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Poly(3-hydroxybutyrate) (PHB) is a biopolymer that can be degraded by extracellular PHB depolymerase. This enzyme is secreted by various microorganisms, but bacterial PHB depolymerases are the most widely studied. The biodegradability rate depends on various factors. By controlling them, the biodegradability rate can change and be customized, and thus, the applications of the polymer can increase and become more diverse. In this work, the role of organomodified montmorillonite (OMMT) on PHB biodegradation was investigated. Using the melt-mixing method, nanocomposites of PHB and OMMT as the nanofiller were prepared. The enzyme was isolated from the fungus Penicillium pinophilum and the enzymatic degradation was studied for both pure polymer and its nanocomposites. It was found that, after 25 days of enzymatic degradation, the mass loss was very low, while the polymer's average molecular weight as measured by gel permeation chromatography was significantly reduced (more than 50%). Additional peaks corresponding to PHB oligomers (from pentamers to nonamers) appeared after biodegradation. This behavior was observed for pure PHB and the hybrid materials. Scanning electron microscopy imaging of the biodegraded surfaces and analysis of these images showed that the higher amount of nanoclay (10 wt %) resulted in larger biodegraded area of the specimens. The results presented here demonstrate that the presence of the nanoclays enhances the biodegradation rate of pure PHB polymer and provide quantitative data for the biodegradation of PHB/organoclay hybrid materials.

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Effect of hydrophilic and hydrophobic monomers grafting on microbial poly(3-hydroxybutyrate)

Cited by 17 publications

References 14 publications

Structure, mechanism and application of vinyl alcohol oligomers grafted onto poly(3-hydroxybutyrate): a proposal

Structure, mechanism and application of vinyl alcohol oligomers grafted onto poly(3-hydroxybutyrate): a proposal

Biodegradable Polymers

Nanocomposites of poly(3‐hydroxybutyrate)/organomodified montmorillonite: Effect of the nanofiller on the polymer's biodegradation

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