Interfacial Polymerization...
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Demonstration of Interfacial Polymerization Demonstrated by Dr. Bill Mickols Compiled by Wei Xie & Hua Li Presented by Benny Freeman Research Group The University of Texas at Austin Feb. 2010
Transcript of Interfacial Polymerization...
Demonstration ofInterfacial Polymerization
Demonstrated by Dr. Bill Mickols
Compiled by Wei Xie & Hua Li
Presented by Benny Freeman Research Group
The University of Texas at Austin
Feb. 2010
Protocol 2
• 2. Mount polysulfone support on a frame.
Protocol 2: Mount polysulfone support on a frame
Protocol 3
• 3. Immerse in 3.0% MPD for over 1 hour.
Protocol 4
• 4. Place a piece of paper towel on the PMMA plate. Place the MPD imbibed polysulfone support on top. Roll water soaked rubber roller over top to remove water droplets.
Protocol 4:Roll rubber roller over top to remove water droplets
Protocol 5
• 5. Place 1/4 inch thick silicone sheet with hole cut in on the support membrane and the PMMA frame on top. Clamp with strong clamps.
Protocol 5:Place silicone gasket and frame on top
Protocol 6
• 6. Pour 75 ml of 5 mM TMC (in dry dodecane) over the surface. Let react for 1 min.
Protocol 6: react with TMC-dodecane solution
Protocol 7
• 7. Pour excess off. Disassemble frame. Mount back on PMMA frame.Rinse the surface with 75 ml of hexane. Allow to evaporate for 1 min.
Protocol 7:Disassemble frame and rinse with hexane
Protocol 8
• 8. Place in water until testing.
Dye test on IP membranes
Rejection: 98.7%, Flux: 35.8 LMH Rejection: 78.4%, Flux: 45.9 LMH
Experimental conditions: cross-flow filtration, pressure = 225 psig, feed = 2000ppm NaCl water solution, feed flow rate = 0.5 gpm.
ATTENTION!!! – Expert’s alarm!
• 1) MPD has a reasonable vapor pressure. Never breath the fumes and use it in a hood.
• 2) TMC does not have a vapor pressure but it readily degrades to TMA and HCL GAS. Opening a sealed bottle will give off HCL gas and could cause lung damage if you breathed a large quantity.
• 3) Hexane is very volatile, so no flames or sparks.
• 4) Never handle the surface of the polysulfone.
• 5) The pictures show a good example of the little bubbles. These are due to the nipping (rubber roller) operation. Clean up the drops of MPD behind the polysulfone. Then put a fresh paper towel between the sheet and the support to absorb the MPD drops.
