Objectives
- Make PVOH/clay films in order to run FTIR and X-ray.
- Run both modified and unmodified pressure testing on microspheres with dye added.
- Prepare DSC samples of all decanted and dried microspheres.
Film Preparation
- PVA/clay films were prepared in order to run examine these films using FTIR and X-ray. These films will be compared to the hydrogel and microsphere samples in order to determine the difference between the prepared PVA/clay structures.
- The films were prepared using the same PVA/clay ratio as that of the prepared microspheres and hydrogels.
- The General Protocol for PVOH film preparation described on 2012/08/29 was used
Table 1. Film Preparation
| PVOH vs. Clay Ratio
|
Clay Selection
|
PVOH 146K Mass (g)
|
Actual Clay Mass (g)
|
H2O Added (mL)
|
| NONE |
NONE |
0.49990 |
NONE |
8.0
|
| 50:50 |
50% CEC NaMT w/ Bu3HdP+ |
0.25280 |
0.2468 |
8.0
|
| 90:10 |
50% CEC NaMT |
0.45770 |
0.05030 |
8.0
|
| 50:50 |
110% CEC NaMT |
0.25020 |
0.25010 |
8.0
|
| 90:10 |
110% CEC NaMT |
0.45020 |
0.05240 |
8.0
|
- After being poured into the Teflon dish, these films were placed in a freezer at -20°C. These films will undergo the same, 3 day freeze-thaw method that both the microspheres and hydrogels were subjected to.
- After they were placed in the freezer, frost appear to cover the films and they appeared to shrink in comparison to the hydrogels which expanded upon freezing
Notes
- As expected, for many of the microsphere placed in the DSC instrument, oil highly affected the analysis of each microsphere sample prepared. Although it was anticipated that a large oil contamination peak would appear, almost all of the microsphere samples only contained two data sample points. DSC will be run again in order to test.
|
Project name
