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We synthesized cationic starch by grafting 2,3-epoxyproplytrimethylammonium chloride onto the backbone of corn starch, and investigated its potential as a draw solute in forward osmosis (FO). The experimental results have shown that the as-prepared cationic starch easily dissolved in water; at 30wt% cationic starch solution, the osmotic pressure was 11.91atm. Increasing the solution temperature decreased...
Positron annihilation spectroscopy (PAS) coupled with a slow positron beam has been used to study the freevolume depth profile (0–10 μm) in polymeric membrane systems prepared by the interfacial polymerization method. Doppler broadening energy parameters of annihilation radiation vary as a function of the depth from the surface through multi-layers in polyamide asymmetric membranes prepared under...
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