Nanoporous Polyelectrolyte Spheres Prepared by Sequentially Coating Sacrificial Mesoporous Silica Spheres

摘要

Mesoporous silicas (MS),porous materials with extremely high surface areas and pore sizes in the range of 2 to 50 nm,have attracted significant interest since being reported in the early 1990s.Owing to their unique pore structures,these materials have been utilized as hosts for the template synthesis of various materials,including metal,metal oxide,carbon,and polymer replicas.In a typical synthesis strategy,the constituent materials (e.g.,metal precursors,sucrose,organic monomers) are infiltrated into the mesopores.Reduction,carbonization,or cross-linking reactions are then performed to obtain an interconnected network,and the silica template is removed by dissolution.Despite these studies,there has been no report on the sequential infiltration and coating of MS materials with preformed polymers for the fabrication of controlled porous polymer structures.Porous polymer materials,especially in particulate form,are of interest in a diverse range of applications,including drug delivery,molecular separation technology,and as hosts for chemical synthesis.