English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/101109
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Title

Novel poly(3-hydroxybutyrate) nanocomposites containing WS2 inorganic nanotubes with improved thermal, mechanical and tribological properties

AuthorsNaffakh, Mohammed ; Marco, Carlos ; Ellis, Gary James ; Cohen, Sidney R.; Laikhtman, Alexander; Rapoport, Lev; Zak, Alla
KeywordsComposite materials Tribology
Nanostructures
Thermal properties
Mechanical properties
Issue Date2014
PublisherElsevier
CitationMaterials Chemistry and Physics 147: 273- 284 (2014)
AbstractPoly(3-hydroxybutyrate) (PHB) nanocomposites containing environmentally-friendly tungsten disulphide inorganic nanotubes (INT-WS 2) have been successfully prepared by a simple solution blending method. The dynamic and isothermal crystallization studies by differential scanning calorimetry (DSC) demonstrated that the INT-WS2 exhibits much more prominent nucleation activity on the crystallization of PHB than specific nucleating agents or other nanoscale fillers. Both crystallization rate and crystallinity significantly increase in the nanocomposites compared to neat PHB. These changes occur without modifying the crystalline structure of PHB in the nanocomposites, as shown by wide-angle X-ray diffraction (WAXS) and infrared/Raman spectroscopy. Other parameters such as the Avrami exponent, the equilibrium melting temperature, global rate constant and the fold surface free energy of PHB chains in the nanocomposites were obtained from the calorimetric data in order to determine the influence of the INT-WS2 filler. The addition of INT-WS2 remarkably influences the energetics and kinetics of nucleation and growth of PHB, reducing the fold surface free energy by up to 20%. Furthermore, these nanocomposites also show an improvement in both tribological and mechanical (hardness and modulus) properties with respect to pure PHB evidenced by friction and nanoindentation tests, which is of important potential interest for industrial and medical applications. © 2014 Elsevier B.V. All rights reserved.
URIhttp://hdl.handle.net/10261/101109
DOI10.1016/j.matchemphys.2014.04.040
Identifiersdoi: 10.1016/j.matchemphys.2014.04.040
issn: 0254-0584
Appears in Collections:(ICTP) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.