User:Mary Mendoza/Notebook/CHEM 581: Experimental Chemistry I/2014/11/04

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Suspension of Synthesized Beads in Malachite Green

  • Beads made from last Friday were suspended in 1 mL 80 ppm malachite green.
80 ppm Malachite Green
80 ppm Malachite Green
PVA-clay beads
PVA-clay beads
PVA-clay beads with 80 ppm Malachite Green at initial addition
PVA-clay beads with 80 ppm Malachite Green at initial addition
PVA-clay beads with 80 ppm Malachite Green after 15 minutes
PVA-clay beads with 80 ppm Malachite Green after 15 minutes

Synthesis of PVA-clay Beads

  • 0.51520 g PVA + 0.05154 g NaMT in 6 mL 10% HCl.
  • 750 uL of 0.8% glutaraldehyde was added to 20 mL of ethyl acetate. The mixture was stirred at maximum speed on a stirrer.
  • The PVA-clay-HCl solution was added to the ethyl acetate mixture in a drop wise manner.
  • 750 uL of 0.8% glutaraldehyde was added to 20 mL of ethyl acetate. The mixture was stirred at maximum speed on a stirrer.
  • Depending on the conditions, microbeads should form between 2-3 minutes. As soon as the beads are visible, IMMEDIATELY ADD 25 mL of 0.2 M NaHCO3. Stir for at least 4 minutes, 15 minutes at most.
  • Beads will be ready once a clear separation of the water and organic phase is observed. Beads will precipitate to the bottom of the beaker. There will still be some beads left in the organic solvent phase.
  • Pour the contents into the falcon tube.
  • Centrifuge for 1 min at 3000 rpm.
  • Afterwards, remove the organic phase and suspend the beads in distilled water.



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