A simple processing technique to
produce novel magnetic poly(styrene-divinylbenzene)
(Poly(St-DVB)) monoliths with highly open porous structure and lipophilicity
is described. A porosity of 98.1% was achieved with the technique
of high internal phase emulsions (HIPEs). The porous monolith possessed
hydrophobicity with a water contact angle of 142° and absorbed
oils from water selectively with an oil intake capacity of approximately
23 times its own mass. Incorporation of carbonyl iron powders (CIPs)
enabled magnetism allowing the oil-soaked composite to be readily
collected by a magnet. The composite saturated with oils could be
regenerated by simple centrifugation, and the tests showed that the
oil intake capacities were not impaired after 10 absorption/regeneration
cycles. As Poly(St-DVB) is a low-cost traditional material and is
easily manufactured in monolithic forms via direct molding and controlled
polymerization, the added features make the porous Poly(St-DVB) composite
a very competitive candidate for oil/water separation.
Controllable ZnO architectures were synthesized via a facile hydrothermal or solvothermal method with the help of ethanolamine, and without any addition of templates.
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