Multifunctional Cellular Materials

Many strategic sectors in nowadays society demand materials with advanced properties. The strategies to produce such type of advanced materials are focused on using complex multiphasic formulations and novel production processes. Such combination allows developing tailored materials with different functionalities able to maximize their performance.

The understanding of the complex mechanisms underlying the formation of multiphasic cellular materials, together with a deep knowledge of the phenomena occurring during the foaming process has allowed CellMat Laboratory the development of multifunctional cellular materials. The use of conventional and non-conventional experimental techniques and the use of advanced modelling of the physical properties are the key factors that have enable the creation of this research line that comprises the following topics:

  • Analysis of the foamability of the formulations: Thermal & Rheological techniques.
  • Use of ex-situ and in-situ characterization techniques to elucidate the mechanisms underlying the formation of foams based on complex multiphasic formulations.
  • Characterization and modelling (analytical & FEM) of the physical properties.
Cellular structure of a polymeric foam characterized by X-ray tomography

A “three” phases model: Wall + struts + gas phase

X-ray radioscopy video showing the internal structure of a thermoplastic foam during foaming. From these type of videos it is possible to obtain information about density evolution with time and foaming mechanisms
Optical expandometry video of a thermoplastic foam
Video obtained using thermography showing the increase in temperature taking place during the foaming process of polyurethane. From this type of videos it is possible to obtain the volumetric expansion and kinetics of growing for these materials
Multiaxial impact behavior of structural foams with different cell sizes and skin thickness