Seeking synergy in membranes: blends and mixtures with polymers of intrinsic microporosity

Amine-functionalized porous organic polymers for carbon dioxide capture

“…Virtually, all other POPs covered here are crosslinked polymers in which two or three-dimensional monomers create the porosity and high surface area. 150 Whereas, in PIMs, the monomers are bulky, contorted, and one-dimensional 151. The inefficient packing of these monomer chains creates the porosity in PIMs rather than the usual case of monomer crosslinking.…”

Molecular Mobility and Gas Transport Properties of Mixed Matrix Membranes Based on PIM-1 and a Phosphinine Containing Covalent Organic Framework

“…Incorporating fillers into a polymeric matrix was found to be a successful approach to reduce this process. The obtained membranes are called mixed matrix membranes (MMM). , The incorporation of a filler can alter the free volume in the polymer matrix and lead to a change in the molecular mobility, affecting physical aging as well as gas transport properties. Furthermore, if the interaction between the filler and matrix is strong enough, this can lead to a stabilization of the polymer matrix.…”

“…For MOFs and zeolites as porous fillers, despite improvements in the permeability values for some gases, the fillers have a weak interaction with the polymer matrix. Therefore, an aggregation of the MOF particles is often difficult to avoid 31 and the resulting poor interface morphology may produce interfacial voids. On the other hand, a strong interaction may result in a rigidification of the polymer segments around the filler particles resulting in a reduced molecular mobility and penetrant diffusivity, and possibly to a blocking of the pores of an accessible filler.…”