User:Mary Mendoza/Notebook/CHEM 581: Experimental Chemistry I/2014/10/29

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Introduction to Bead Synthesis

  • It has been mentioned that the synthesis of polymer beads is probable. The following procedures were performed through trial and error.
  • 0.0550 g of sodium montmorillonite and 0.5000 g of PVA was added to 6 mL of 10% HCl with heat at approximately 80°C.
  • Others dissolved their NaMT and PVA in 7 mL; I thought that minimizing the volume of HCl is best since the addition of heat is sufficient to dissolve the solids. I chose the volume of 6 mL by observing that this amount is not saturated with the solids portion of the mixture.
  • 1 M HCl (10% HCl) was diluted from 12 M HCl into water by Dr. Hartings.
  • The mixture was allowed to stir until dissolved.
  • Once the mixture was dissolved, a pasteur pipette was used to make add droplets into solutions.
  • James and I performed the procedure while Jake observed and recorded the trials performed.

Acetone Trial

  • PVA-Clay was not strong enough to hold a sphere but rather made string/fibers. This can be weaved into a sort of bead but this cannot be measured
  • James suggested that an organic phase such as hexane should enable the formation of beads.

Hexane Trial #1

  • HCl is immiscible in Hexane, spherical constitution of beads was overall maintained. Upon adding to Glutaraldehyde, the beads did not stay together.
  • Used 250μL Gluteraldehyde in 10mL Hexane
Initial creation of beads in Hexane.

Hexane Trial #2

  • This time the Glutaraldehyde was rapidly stirred and the PVA-Clay solution was slowly dropped in. Bead formation was observed while stirring, however the beads were not given enough time to finish cross linking and stuck together.
  • Used 100μL Glutaraldehyde in 10mL Hexane

Hexane Trial #3

  • Bigger container and more time in between drops in order to allow more time to cross linking.
  • 200μL Glutaraldehyde in 150mL Hexane

Hexane Trial #4

  • Using a blender this time in attempt to make an emulsion.