Porous Nanocomposites with Monolayer Nano-SiO₂ Coated Skeleton from Interfacial Nanoparticle-Anchored Cocontinuous Polymer Blends

The porous nanocomposites with a monolayer nano-SiO₂ coated skeleton have been prepared from interfacial nanoparticle-anchored cocontinuous blends. It is shown that a uniform SiO₂ monolayer, which is fully immobilized on a three-dimensional (3D) pore wall with the diameter of ∼20 nm, has been obtained by sequential reactive blending, the etching sacrificial PLLA phase, and acidification process from a cocontinuous PVDF (polyvinylidene fluoride)/PLLA (poly-l-lactic acid) blend with interfacially anchored SiO₂. On the one hand, the rigid nano-SiO₂ coating endows internal protection coincidence with the surface for porous nanocomposites. On the other hand, the nano-SiO₂ monolayer ensures the surface wettability of materials. Therefore, the porous nanocomposites demonstrates simultaneously enhanced structural stability, hydrophilicity and antifouling performance, e.g., excellent curling/shrinkage/expansion resistance, and mechanical properties as compared with traditional counterpart upon surface mineralization. This establishment paves an efficient avenue for industrialization of porous nanocomposites with superior comprehensive performance through a facile reactive processing strategy.