2014, Volume 16, Issue 7
Strategic Study of CAE >> 2014, Volume 16, Issue 7
InterfacialpolymerizationinconstrictedzonetoinducedReverse osmosisandnanofiltrationmembranes orientedsynthesis
Development Center of Water Treatment Technology，Hangzhou 310012，China
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Abstract
Herein, we report a new concept, constricted interfacial polymerization to study the formation of polyamide thin film composite membranes. Delayed diffusion of protected polyfunctional amine reacts with acyl chloride to produce a transition surface structure. Hydrophilic macromolecules and amphiphilic template induced interfacial polymerization reacted in a limited zone, the aggregation state of polymer chains transform from a random state to a regular stateand membrane permeability increases without a loss of salt rejection. Zeolite nanoparticles dispersed in RO composite membrane changed film morphology and water permeability is increased nearly 50% with equivalent salt rejection.
Keywords
constricted interfacialpolymerization ; reverse osmosis ; nanofiltration ; surface morphology ; separation performance
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