User:Karlena L. Brown/Notebook/PVOH Research/2013/04/12

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  • Begin X-ray analysis of microsphere samples
  • Begin to run DSC sample analysis on hydrogel samples previously prepared on 2/04/13
  • Continue making films containing both clay and PVOH variations to run X-ray analysis
  • Add H2O to hydrogel samples containing Rhodamine 6G dye in order to run DSC and X-ray analysis (leach out dye before analyses)

DSC Analysis: Mixed Microspheres 3

DSC preparation and protocol involving instrumentation and usage can be found on 9/17/12 entry.

Sample Name Sample Mass (mg) Pan / Lid Mass (mg)
90:10 PVOH 146K 50% CEC NaMT w/ Bu3HdP+ 3.10 49.78
90:10 PVOH 146K NaMT 3.01 49.99
  • Specific DSC parameters and protocols set to analyze dry clay samples included the following:
   # Equilibrate sample at ~ -40°C
   # Ramp sample temperature up from 20-240°C
   # Ramp sample temperature down from 20-(-40°C)
   # Repeat segment #2 again

PVOH Film Preparations 2


PVOH vs. Clay Ratio Clay Selection PVOH 146K Mass (g) Actual Clay Mass (g) H2O Added (mL)
50:50 NaMT 0.26260 0.24770 8.0
90:10 NaMT 0.40100 0.12140 8.0
50:50 Laponite 0.24750 0.24580 8.0
90:10 Laponite 0.40580 0.10910 8.0
90:10 110% CEC Laponite w/ DMHXLBR 0.25080 0.24850 8.0
50:50 110% CEC Laponite w/ DMHXLBR 0.39820 0.10840 8.0


  • In regards to microsphere preparations, in order to vortex the new microsphere samples being prepared more efficiently, a more advanced, efficient, and high speed vortexer will be used instead of a sonicator for vortexing samples.
  • X-ray analysis on 4/12/13 was solely run on the microsphere sample: 50:50 PVOH 130K 110% CEC Laponite w/ DMHXLBR.
  • H2O had to be added to previous hydrogel samples prepared on 2/04/13 in order to leach out Rhodamine 6G dye and to soften up the hydrogels -- many of them were extremely too hard to cut into smaller cubes.