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Transcript: High water flux for both membrane types Improved fouling resistance Nanofiltration membranes, much more efficient than ultrafiltration to obtain water from textile effluents Next Steps 2 Melt extrusion (non-solvent system) Compression molding Solution casting (mostly used) The Importance of Highly Branched Polymers * Step 2: * Molecular weight control with GPC * Wastewater containing dyes : Color and potential toxicity * Dye removal from colored effluents * * * Order of monomer addition for instance, A over B or B over A ...move on to highly branched polysulfone... The film formation ability was checked out. LPSf (12 wt %) was applied with ~ 5x5 (cm) area. * * Reaction time Polyamide Type Top Layer Thickness Measurement 2 * Infinite molecular weight * Various hyperbranched structures * Low molar mass products before the gel point * Multicyclization products Polysulfone and Functional Polysulfone Membranes in Water Treatment A : B = 1:1.1 Procedure of Sequential Interfacial Polymerization 2 * * Poly(N-vinylpyrolidone) better than poly(ethylene glycol) * DMAc more suitable than NMP Sequential interfacial polymerization Filler Addition Advantage A : B = 1:1 * A compact intrinsic structure * Functional terminal groups * Low viscosity * High solubility * One-pot approach, stepwise polymerization Comparison of the rejection performance 3 Polymer-assisted method of membrane formation Membrane Preparation Difficulties Novel Polyamide Bilayer Membrane ...move on to highly branched polymer... Two polymers are needed. Physically compatible but immiscible polymers in a common solvent What if we do not control the branching? 2 Polyamide and Polyethersulfone Membranes in The Nanofiltration of Reactive Dye-Salt Mixtures Thank you January, 11 2016 A + B Approach To Highly Branched Polymers Step 1: 3 Further Steps Interfacial Polymerization Membrane Types Control: Absorption intensity of carbonyl polyamide group using the equation as follows: * LPSf with Mn: 42742 g/mol was synthesized. Also, membrane thickness is important for PSf. The Importance of Controlled Branching 2 Membrane Preparation Difficulties and The Solution To The Difficulty Macrovoid formation * When a more porous top layer is obtained, the macrovoids formation is suppressed. 3 Advantages of Nanofiltration and Ultrafiltration Membranes . 3 3 th * Merve Biçen * * Suppression of macrovoids * Enhanced mechanical strength & lifetime * Enhanced interconnectivity of the pores: Superior permeability Microporous membranes : Suitable for ultrafiltration & microfiltration Preparation: Phase Inversion

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