Memorias de investigación
Communications at congresses:
Novel Biopolymer Composites based on WS2 Inorganic Nanotubes

Research Areas
  • Nanotechnology,
  • Nanoparticles,
  • Biopolymers

Recently, research interest in the field of thermoplastic composites has moved from "high-performance" advanced materials towards the development of "cost-performance" engineering composites. In particular, thermoplastic-based composites reinforced with tungsten or molybdenum disulfide (WS2 or MoS2) inorganic fullerene-like nanoparticles (IFs) and nanotubes (INTs) have been shown to offer design, processing, performance and cost advantages when compared to carbon nanotubes, nanoclays or other inorganic nanoparticles, for manufacturing advanced structural parts by simple melt-processing routes without the need for modifiers or surfactants. The property improvements generated by these nanostructures have also resulted in their synergetic use with other organic micro-particles (nucleating agents), micro-fibers (carbon fibers) or nanofillers (carbon nanotubes) to tailor more sophisticated hybrid materials with complex architectures, interactions, morphology and functionality. Moreover, INT-WS2 are low-cost, environmentally friendly and biocompatible nanofillers since they possess a much lower cytotoxicity than other nanoparticles, such as silica or carbon black, rendering them attractive for several technological and biomedical applications. The aim of this presentation is to highlight the latest findings on the use of WS2 inorganic nanotubes in the development of novel biopolymer composite materials with enhanced thermal, mechanical and tribological properties for a series of key application areas. Particular interest has been devoted to the analysis of the influence of INT-WS2 on the structure, morphology and properties of biodegradable and renewable thermoplastics, such as poly(3- hydroxybutyrate) (PHB), poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV) and poly(Llactic acid) (PLLA). Recent results have raised new expectations, since it has been observed that well-dispersed INT-WS2 exhibit a much more prominent nucleation activity, improving the poor crystallizability of PLLA than specific nucleating agents or other nanosized fillers, such as carbon nanotubes and graphene. Similarly, good dispersion and interfacial interactions of INT-WS2 in the PHBV (PHB) matrix positively influenced the morphology and the overall crystallization process of PHBV (PHB). These features may be advantageous for the enhancement of the mechanical properties and processability of this new class of WS2-based composite materials.
20th International Conference on Composite Materials (ICCM20)
Copenhagen (DInamarca)
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Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Bioingeniería y Materiales (BIO-MAT)