User:Alicia Rasines Mazo/Notebook/CHEM-581 Experimental Chemistry I/2014/10/17

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Tasks for October 17

  • To begin synthesis of PVa and 10% wt PVA-Clay films
  • To complete synthesis of films from Oct. 15
  • To complete synthesis of cation exchange modified clays
  • To determine density of films
  • To complete data analysis

New film synthesis

  • 1.0046 g of 22,000 MW PVA and 0.1113 g of NaMT were hydrated with 7 mL of distilled water
  • 1.0082 g of 22,000 MW PVA were hydrated with 7 mL distilled water
  • Heated at approx. 80ºC under gentle stirring until all crystals were dissolved
  • Cooled to room temperature
  • Added 0.5 mL 0.8% wt glutaraldehyde
  • Stirred for 3 min to ensure homogeneity
  • Poured into teflon dish

Completion of film synthesis

Placed film in sodium sulfate, 1% HCl and sodium bicarbonate.

Measuring density of films

  • Cut out 3 pieces each from PVA and PVA-Clay polymer films, allowed to dry and weighed. Measured volume.
Film Initial Mass (g) Dried Mass (g) Displaced volume (mL)
PVA film 0.0278 0.0102 0.1
0.0255 0.0129 0.07
0.0265 0.0089 0.114
PVA-Clay film 0.0122 0.0067 0.480
0.0177 0.0102 0.44
0.0307 0.0145 0.23
  • Density was found to be:

Completion of ionic modified clays

  • Completed synthesis from Oct. 3



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