Preparation Of Nano/macro-porous Organic-inorganic Hybrid Materials

Porous materials have attracted more attention because of its large BET surface area, low density and other special properties. Many kinds of porous materials have special structure, controllable distributed pore size, thermal and mechanical stability etc. These special properties make this kind of materials have more potential application in many fields, such as medical, chemical industry, metallurgy, environmental protection, building materials, sea water desalinization etc.In this thesis, we focused on the preparation of the ordered porous membranes which contained two parts. First, we fabricated the self-standing hybrid membranes with ordered mesoporous structure. The main chain of PAA may participate in the assembling aggregation of the non-surfactant templates DBTA, which may result in the formation of the ordered mesoporous structure in hybrid films. Second, we prepared the pore-filling organic-inorganic hybrid proton exchange membranes. We succeed in fabricating SiO2 opal template with large area and ordered structure by studying the influence of pH and NaCl on the formation of SiO2 opal templates. Three-dimensional ordered macroporous (3DOM) PI membranes obtained from the templates of SiO2 opal were filled with polyelectrolyte to fabricate the hybrid proton exchange membranes. These new nano/macro-porous hybrid materials have widely application in fuel cell, catalysis and low dielectric materials.