User:Elizabeth Ghias/Notebook/Experimental Chemistry/2012/10/03

Objective

To crosslink the two clay films and make a 1 gram PVOH film with glutaraldehyde

Description

Crosslinking Clay Films

1. Allow the PVOH film containing glutaraldehyde to dry completely.
2. Prepare a solution of 100 mL H₂O, 2 mL concentrated H₂SO₄, and 20 g Na₂SO₄ in a 150 mL beaker. (solution is referred to as glutaraldehyde fixant)
3. Place stir bar in beaker and a Buchner funnel top (cap) over the stir bar
4. Heat solution to 70°C (temperature on hotplate should be about 160)
5. Place film in solution for one hour.
6. Prepare 100 mL of a 1% HCl solution in a 150 mL beaker. Place a stir bar and an inverted buchner funnel into beaker.
7. Heat HCl solution to 70°C
8. Remove film from glutaraldehyde fixant and rinse with distilled water.
9. Place film into HCl solution for 30 minutes.
10. Prepare 0.2 M sodium bicarbonate solution. (1.68 g in 100 mL)
11. After 30 minutes, remove the film from the HCl solution and place into the sodium bicarbonate solution (at room temperature) for about 15 minutes.
12. Use tweezers to remove the film from the sodium bicarbonate solution.
13. Rinse film with deionized water and dry film on paper towel.

Making a 1g Film

1. 0.5 g of PVOH was dissolved in 5 mL of water and was placed on a hotplate
2. 1 mL of glutaraldehyde was added to the solution under the hood.
3. The mixture was allowed to stir for about 3 minutes.
4. The film was poured into a dish and was left under the hood over the weekend

Data

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Notes

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