Mixed matrix membranes
having combined properties of both polymeric
and inorganic materials have become the principal focus on separation
technology. This work insights an original strategy of mixed matrix
membrane preparation incorporating positively charged inorganic nanoparticles
(INPs) with negatively charged polymeric nanoparticles (PNPs) using
spin coating technique. The PNPs with different morphologies (spheres,
worms, and vesicles) made of poly(methacrylic acid)-b-(methyl methacrylate)) diblock copolymer were synthesized using
RAFT dispersion polymerization in ethanol at 70 °C. The inorganic
counterpart, iron oxide nanoparticles coated with poly(methacrylic
acid)-b-poly(quaternized 2-(dimethylamino)ethyl methacrylate)
were synthesized and incorporated into the membrane acting as a bridge
between the negatively charged polymeric particles (due to the presence
of opposite electrostatic charges). Permeability tests were carried
out using the feed of different pH at various pressures.
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