User:Moira M. Esson/Notebook/CHEM-581/2012/10/03: Difference between revisions

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**Although the clay films did not contain enough glutaraldehyde, the films did not dissolve and were able to complete crosslinking
**Although the clay films did not contain enough glutaraldehyde, the films did not dissolve and were able to complete crosslinking
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  2.The general protocol for crosslinking of PVOH films described on was used for crosslinking PVOH MW 130,000+[HCl]
2.The general protocol for crosslinking of PVOH films described on was used for crosslinking PVOH MW 130,000+[HCl]
*'''Observations/Notes''':
*'''Observations/Notes''':
** Crosslinked PVOH MW 130,000 film was a brown color and appeared more glossy than before. Although there was a color change, the brown color was not as dark as the crosslinked PVOH MW 22,000 films
** Crosslinked PVOH MW 130,000 film was a brown color and appeared more glossy than before. Although there was a color change, the brown color was not as dark as the crosslinked PVOH MW 22,000 films

Revision as of 19:34, 4 October 2012

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Objectives

  1. Finish crosslinking all films prepared with glutaraldehyde
  2. Use the ion selective electrode to measure the CuSO4 solutions made on 9/28/2012 by Melissa Novy and Karlena Brown
  3. Crosslink PVOH MW 130,000 film with [HCl]

Crosslinking

  1. The general protocol for crosslinking glutaraldehyde films described on 9/14/2012 was used


Crosslinking Glutaraldehyde films

' PVOH MW 22,000+ 0.8wt% glutaraldehyde+0.1010g 100% CEC surfactant clay PVOH MW 22,000+ 0.8wt% glutaraldehyde+NaMT PVOH MW 22,000+ 0.8wt% glutaraldehyde+PDMS
Amount solution 1 added(mL) 100.0 100.0 100.0
Amount of 1% aqueous HCl added (mL) 100.0 100.0 98.0
Amount of 0.2M sodium bicarbonate solution added(mL) 100.0 100.0 100.0
Amount of Sodium Bicarbonate added to sodium bicarbonate solution(g) 1.6898 1.6809 1.6804
Mass of film after crosslinking (g) 0.5519 ... 0
  • Observations/Notes for crosslinking glutaraldehyde films:
    • When the PVOH MW 22,000+0.8wt%glutaraldehyde+PDMS film was first put into solution 1, the film was much more flimsy than any other film. The texture was more like glue than a rubber consistency as the other films
    • Upon adding the PVOH MW 22,000+0.8wt%glutaraldehyde+PDMS film to the 1% HCl solution, the film completely dissolved
    • Reviewing notes, it was observed that too little glutaraldehyde was added to each of the above mentioned films(only 8.4μL instead of 1mL).
    • New glutaraldehyde films(1.PVOH MW 22,000, 2.PVOH MW 22,000+replacing 5% of PVOH with PDMS, 3.PVOH MW 22,000+ 100% CEC surfactant clay, 4. PVOH MW 22,000+NaMT) using 1mL glutaraldehyde will be prepared
    • Although the clay films did not contain enough glutaraldehyde, the films did not dissolve and were able to complete crosslinking


2.The general protocol for crosslinking of PVOH films described on was used for crosslinking PVOH MW 130,000+[HCl]

  • Observations/Notes:
    • Crosslinked PVOH MW 130,000 film was a brown color and appeared more glossy than before. Although there was a color change, the brown color was not as dark as the crosslinked PVOH MW 22,000 films

Ion Selective Electrode


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