Studied by 6 peopleWhat does CMS stand for
Carbon molecular sieves
What doe CMS result from
the high temperature pyrolysis of some polymers at controlled conditions
in general, what do CMS consist of
highly disordered graphene-like carbon sheets, with very little long-range order (amorphous phases)
What does the CMS phases display
open micropores connected by rigid slit-like ultramicropores to provide high sorption and diffusion coefficients
What do CMS exhibit
distributions of micropores and ultramicropores
What happens during the conversion process of CMS
reorganization of polymer main chains occurs, with small gas molecules released and free radicals formed. Those free radicals can form crosslinking leading to a 3D network with graphene-like structure. With increasing temperature, these networks can form ordered structures
What can form ‘slit-like’ pore structure, combined with a bimodal pore distribution
The packing imperfections between ordered regions
What are the main challenges of CMS
First you need to start with a high quality MOF membrane. High temperature needed to convert the MOF in CMS may be an issue to preserve membrane integrity. Control over pore size may be quite challenging…. Lots of trial error experiments. Once you (hopefully) get a continuous CMS membrane, STABILITY may be an issue
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