User:Alicia Rasines Mazo/Notebook/CHEM-581 Experimental Chemistry I/2014/09/12: Difference between revisions

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! scope="col" | Film weight (g)
! scope="col" | Film weight (g)
|-
|-
! scope="row" | 200 ppm (1)
! scope="row" | 200 ppm  
| 13.1537 || 13.2537 || 0.1000
| 13.1537 || 13.2537 || 0.1000
|-
|-
! scope="row" | 200 ppm (2)
! scope="row" | 80 ppm
| 13.0783
| 13.0332
| 13.1843
| 13.1408
| 0.1060
| 0.1076
|-
|-
! scope="row" | 80 ppm (1)
! scope="row" | 8 ppm  
| 13.0332 || 13.1408 || 0.1076
| 13.0325 || 13.1298 || 0.0973
|-
|-
! scope="row" | 80 ppm (2)
! scope="row" | 2 ppm  
| 13.0325 || 13.1298 || 0.0973
| 13.0783 || 13.1843 || 0.1060
|-
|-
|}
|}

Revision as of 12:30, 12 September 2014

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Tasks for September 12 2014

To start preparing new films using exfoliated clay. <br.> Perform XRD measurement. <br.> Continue analysis of DSC and UVVis.<br.> To make new stock solutions of malachite green dye

Preparation of 10% PVA-exfoliated clay

Refer to Dr. Harting's Notebook for full details on the procedure

  • 2.7613 g of the 4% sodium montmorillonite were added to 1.0040 g of Polyvinyl Alcohol to make up a 10% PVA-exfoliated clay film
    • The calculations were as follows: 0.04[NaMT]=0.11
    • x= 2.75
  • 7 mL of water were added and the solution was heated to 75ºC with constant stirring
  • Solution was left to cool down to room temperature
  • Added 0.5 mL of 0.8 wt% glutaraldehyde.
  • Stirred for an additional 3 minutes to ensure homogeneity
  • Poured solution into a teflon dish to dry until the next class

Preparation of new malachite green solutions

  • A new 200 ppm MG solution was made by adding 40 mg of malachite green and making up to the mark with distilled water in a 200 mL volumetric flask.
    • (200 mg MG/1L)×0.2 L = 40 mg MG
  • 80 ppm made by Eleni's group
  • 8 ppm made by Andrew's group
  • 2 ppm made by James' group

Second measurement of MG dye absorbance into PVA polymer films

Redid measurements due to anomalies and discrepancies across group results.

  • Note: PVA polymer was blotted dry with a KimWipe before adding to glass vial and weighing.
Measurements to calculate mg MG absorbed per mg film
Empty glass vial (g) Glass vial + film (g) Film weight (g)
200 ppm 13.1537 13.2537 0.1000
80 ppm 13.0332 13.1408 0.1076
8 ppm 13.0325 13.1298 0.0973
2 ppm 13.0783 13.1843 0.1060


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