User:Moira M. Esson/Notebook/CHEM-581/2012/10/01: Difference between revisions
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**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 H<sub>2</sub>O and uncurled | **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 H<sub>2</sub>O and uncurled | ||
** After 1hr in fixant solution, the film had a more rubber like texture | ** 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''': | *'''Note''': | ||
** | **Previously crosslinked glutraldehyde film was weighed and stored in deionized H<sub>2</sub>O | ||
Mass of glutaraldehyde film before storage in H<sub>2</sub>O: 0.6701g | |||
==Solubility== | ==Solubility== | ||
*The General protocol for testing viscosity was followed | *The General protocol for testing viscosity was followed using viscometer 2190 | ||
*'''Observations''': | *'''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 | **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 H<sub>2</sub>O at 25°C | |||
{| {{table}} | |||
| align="center" style="background:#f0f0f0;"|'''Trial [ ]''' | |||
| align="center" style="background:#f0f0f0;"|'''Time [s]''' | |||
|- | |||
| 1|| 240.73 | |||
|- | |||
| 2|| 241.34 | |||
|- | |||
| 3|| 241.81 | |||
|- | |||
|} | |||
* Average time = 241.29 s | |||
<br> | |||
* Viscosity of PVOH MW 22,000+[HCl]+10%maleic acid at 25°C | |||
{| {{table}} | |||
| align="center" style="background:#f0f0f0;"|'''Trial [ ]''' | |||
| align="center" style="background:#f0f0f0;"|'''Time [s]''' | |||
|- | |||
| 1|| 247.35 | |||
|- | |||
| 2|| 246.91 | |||
|- | |||
| 3|| 247.49 | |||
|- | |||
|} | |||
* Average time = 247.25 s | |||
Revision as of 19:14, 14 October 2012
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Objectives
Glutaraldehyde Crosslinking
Mass of glutaraldehyde film before storage in H2O: 0.6701g Solubility
Viscosity Calculations
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