Objective
- Complete the film synthesis from Wednesday
- Start new film synthesis of both polymer films and polymer-clay films.
- Make all Malachite green solutions
Protocol
- Complete Film synthesis from Wednesday August, 27th
- Warm 150mL of Sodium Sulfate Solution at 80C for 15 minutes
- Place film in Sodium Sulfate Solution at 80C for 1 hour with gentle stirring
- Warm 150mL of 1% HCl at 80C for 15 minutes
- Place film in 1% HCl Solution (see below for details) at 80C for 30 minutes with gentle stirring
- Place film in Sodium Bicarbonate Solution for 15 minutes at room temperature with gentle stirring
- Starting new film Synthesis
- create a new 10% clay-polyvinyl alcohol film using Wednesdays procedure
- create a 5% clay-polyvinyl alcohol film
- Malachite Green Solutions
- 25mL 0.20ppm Malachite Green
- 25mL 0.50ppm Malachite Green
- 25mL 1.1ppm Malachite Green
- 25mL 1.4ppm Malachite Green
- 25mL 1.7ppm Malachite Green
- 50mL 2.0ppm Malachite Green
- 50mL 8.0ppm Malachite Green
- 50mL 80.0ppm Malachite Green
- 50mL 200.0ppm Malachite Green
Solution Preparation
- 0.2M Sodium Sulfate Solution
- I dissolved 22.034g of anhydrous Na2SO4 in 1000mL of water
- I added 100mL of concentrated H2SO4 to this solution
- This solution will be used to enable the reaction between polyvinyl alcohol and glutaraldehyde in order to cross link the polymer film
- 1% wt. HCl Solution
- I added 10mL of concentrated HCl to 985mL of water
- This solution will be used to enable the reaction between polyvinyl alcohol and glutaraldehyde in order to cross link the polymer film
- 0.2M Sodium Bicarbonate Solution
- I dissolved 17.042g of NaHCO3 in 1000mL of water
- This solution will be used to neutralize the acid in your films
- New film synthesis of 10% and 5% clay by weight
- Polymer-Clay Films
- Add 7mL of water to 1g of polyvinyl alcohol and 0.05g of sodium montmorillonite in a glass vial
- Stir the solution with constant heating at 75C until the polymer is dissolved and the clay is dispersed (~15 minutes)
- Cool the solution to room temperature
- Add 0.5mL 0.8 wt% glutaraldehyde.
- Stir for an additional 3 minutes to ensure homogeneity
- Pour solution into a teflon dish to dry
- Malachite green solutions
Data
UV-vis spectra of Malachite Green Solutions from 0.2ppm to 8ppm
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