In recent years, Membrane Distillation (MD) has emerged either as a promising alternative or as a complement to Reverse Osmosis (RO) in seawater desalination. However, the performance of MD is significantly offset by temperature polarization, a phenomenon intrinsically related to water evaporation that causes the decrease of the solution temperature at the membrane surface and, ultimately, the loss of driving force. In this work, we show that temperature polarization can be withdrawn by exploiting thermal collective effects activated by the excitation of plasmonic modes in UV-irradiated Mixed Matrix Membranes composed of silver nanoparticles (Ag NPs) incorporated in polyvinylidene fluoride (PVDF) microporous films. For experimental tests carried out under vacuum (VMD) and with an absorbed radiant heating power of 2.3 · 104 W/m2, best results were obtained using PVDF membranes loaded with 25%Ag …