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Objectives
- Crosslink glutaraldehyde film (PVOH MW 22K)
- Test solubility:
- PVOH MW 22000+HCl+10%Maleic Acid
Glutaraldehyde Crosslinking
- The General Protocol described on 9/14/12 was followed
- Observations:
- The sides of the glutaraldehyde film started to curl upwards ~20minutes into heating in the first fixant solution. When pushing down with a plastic pipette, the film was resubmerged in H2O and uncurled
- After 1hr in fixant solution, the film had a more rubber like texture
- After 1/2 hour in 1% HCl solution, the film(which was a rubber like texture during this step in prior crosslinking)the film dissolved and resolidified on the stemless Buchner funnel. Part of the film was a gel-like substance, but the glutaraldehyde and fixant was discarded
- Note:
- Previously crosslinked glutraldehyde film was weighed and stored in deionized H2O
Mass of glutaraldehyde film before storage in H2O: 0.6701g
Solubility
- The General protocol for testing viscosity was followed using viscometer 2190
- Observations:
- Mass of film used: 0.0734g
- The PVOH MW 22000+HCl+10%Maleic Acid film was allowed to stir for 1 hour. Although the film did not completely dissolve after 1 hour, the size of the film did shrink drastically
- Stored the film that remained after 1hr. stirring for further testing
Viscosity Calculations
- Viscosity of pure H2O at 25°C
| Trial [ ]
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Time [s]
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| 1 |
240.73
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| 2 |
241.34
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| 3 |
241.81
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- Viscosity of PVOH MW 22,000+[HCl]+10%maleic acid at 25°C
| Trial [ ]
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Time [s]
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| 1 |
247.35
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| 2 |
246.91
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| 3 |
247.49
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