Chapter

Biodegradable nanocomposites based on poly(hydroxyalkanoates)

Narendra K. Singh and Pralay Maiti

in Nanocomposites with Biodegradable Polymers

Published in print April 2011 | ISBN: 9780199581924
Published online September 2011 | e-ISBN: 9780191728853 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780199581924.003.0012

Series: Monographs on the Physics and Chemistry of Materials

Biodegradable nanocomposites based on poly(hydroxyalkanoates)

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This chapter aims at highlighting on recent development in preparation, characterization, properties, crystallization behaviors, thermal degradation, melt rheology, controlled biodegradation, and future application possibilities of polyhydroxyalkanoates (PHA) biodegradable polymers and their nanocomposites in presence of various nanoparticles. Biodegradable materials are attracting considerable interest in materials science research. Various types of nanofillers ranging from zero- to three-dimensions, e.g. spherical particles, nanotube/nanowire, platelets like layered silicates are incorporated to reinforce the polyhydroxyalkanoate matrices. Different routes to prepare/synthesize PHA nanocomposites are discussed; the effect of nanofillers on the structure, properties, and processing behaviour of PHA is accounted elaborately. Works on intercalated or exfoliated structure have been presented in case of layered silicate nanofillers. One of the important aspects of this class of material is biodegradation. The biodegradation behaviour in presence of various nanoparticles is described. Controlled biodegradation is another prime facet of this review. Finally, the new family of composite materials frequently exhibits remarkable improvements of mechanical and material properties when compared with pristine polymers or conventional micro- and macro-composites. Improvements can include a high storage modulus both in solid and molten states, increased tensile properties, decrease in gas permeability, thermal stability, increase and regulated biodegradation rate.

Keywords: polyhydroxyalkanoates; nanocomposites; nanoparticles; preparation; properties; structure; crystallization; biodegradation; layered silicate; carbon nanotube; nanowhisker

Chapter.  12449 words.  Illustrated.

Subjects: Condensed Matter Physics

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