Mixed matrix membrane (MMM), a currently popular research
field, is a type of membrane formed by incorporating fillers in polymer matrix.
Its preparation procedures mainly involve with only blending and phase
inversion.
According to its structure, MMM can typically be divided into
two categories. The first one is with a dense structure, mostly developed for
the applications in gas separation, pervaporation, fuel cell, and so on. The fillers employed for improving the
MMM performance in
this category are usually inorganic nanomaterials (zeolite, carbon nanotube,
metal organic framework, etc.) with specific features (shape, pore size,
surface interaction, etc.).
The other category is with a porous structure, specially
designed for adsorption purpose. Micro-to-nano-size particles with
functionality are regularly adopted as the fillers for this kind of MMM to
provide the adsorptivity with target solutes.
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