Title: Mixed matrix membrane for hydrogen separation enhanced by Oxacalix[4] arene-Containing porous organic polymers,
Separation and Purification Technology 2025, 354, 129308.
Atbstract:
The
mixed matrix membranes (MMMs) have great potential for industrial H2
enhancement applications. However, some challenges remain to incorporate
the nanoporous architectures with industrial processable polymers. In
this work, a macrocyclic cavitand from oxacalix[4]arene was integrated
into porous polymers via a facile ringopening-metathesis polymerization
(ROMP), the resulting BIT-POP-20 was added to polysulfone matrix to make
novel MMMs with different mass ratios. These membranes improved gas
permeation rate for CO2, H2 and He, compared with pristine polysulfone,
and high H2/N2 selectivity of 105 was achieved. This huge improved H2/N2
separation performances were due to the nanoporous gas passages through
the open supramolecular cavities. This work presents an interesting
example in designing MMMs using intrinsic macrocyclic cavity in porous
polymer backbone that helps increase their performances in gas
separations.