Optimization of Polyurethane Panels Properties through Different Particle and Fiber Reinforcement

Polyurethane is a highly versatile material and depending on its structure it can be applied in several application fields. One of main applications insulating for the construction sector, while most common product shape rigid expanded panel. This work investigates possibility optimizing polyurethane panels building purposes by considering different particle fiber reinforcements. Precisely, addition reinforcement percentages bentonite, phyllite, recycled textile microfibers (both untreated treated with NaOH) considered mixes composed isocyanate, polyol, water, silane additive, catalysts. For reinforced samples, castor oil additionally as more sustainable polyol component mix. Thermal conductivity positively reduced increasing phyllite content; indeed, these microspheres further apport porosity to material, so lower density, promotes homogeneous, fine, closed porosity. Besides, both NaOH treatment enhance thermal too. Since materials may find also structural elements, stress relaxation, compression tests are performed. Polyurethanes containing display greater stiffness mechanical improvements specific ranges percentage. On other hand, exceeds one an order magnitude improving properties terms maximum load recovery. In conclusion, reinforcements alternative polyols valuable solutions towards performant differentiation.