User:Melissa Novy/Notebook/CHEM-581/2012/09/12

Objectives

• Make 0.8 wt% glutaraldehyde in PVOH (MW 22000) film.
• Exchange 2.0 g Na-MT with 100% tributyl(hexadecyl)phosphonium bromide (Bu₃HdP⁺).
• Exchange 2.0 g Na-MT with 50% (Bu₃HdP⁺).
• Make 2.0 g Na-MT coated with Fe₃O₄ in a 2:1 ratio of Na-MT to Fe₃O₄.
• Run DSC on crosslinked and uncrosslinked PVOH (MW 22000) films.

Na-MT/Bu₃HdP⁺ Exchanges

• 100% exchanged Na-MT and Bu₃HdP⁺:
  • Mass Na-MT: 2.0095 g

  2.0095 g Na-MT x (92 meqv/100 g Na-MT) x (1 mol Bu3HdP+/1000 meqv) x (100/100)% x (507.65 g Bu3HdP+/1 mol Bu3HdP+) = 0.9385 g Bu3HdP+

• 50% exchanged Na-MT and Bu₃HdP⁺
  • Mass Na-MT: 2.0046 g

  2.0046 g Na-MT x (92 meqv/100 g Na-MT) x (1 mol Bu3HdP+/1000 meqv) x (50/100)% x (507.65 g Bu3HdP+/1 mol Bu3HdP+) = 0.4682 g Bu3HdP+

Na-MT Coated with Fe₃O₄

• Please see Moira Esson's entry for procedure and notes.

DSC on Crosslinked and Uncrosslinked PVOH (MW 22000) Films

• Please refer to entry on 2012/09/07 for DSC procedure.
• PVOH (MW 22000)
  • Pan mass: 49.78 mg
  • Sample mass: 3.20 mg

• Uncrosslinked PVOH (MW 22000), 10% maleic acid, HCl
  • Pan mass: 50.41 mg
  • Sample mass: 2.90 mg

• Uncrosslinked PVOH (MW 22000), 10% succinic acid, HCl
  • Pan mass: 49.26 mg
  • Sample mass: 2.92 mg

• Crosslinked PVOH (MW 22000), 15% maleic acid, H₃PO₄
  • Pan mass: 49.96 mg
  • Sample mass: 3.13 mg

• Crosslinked PVOH (MW 22000), 15% succinic acid, H₃PO₄
  • Pan mass: 49.70 mg
  • Sample mass: 3.10 mg

PVOH and Glutaraldehyde Film

• To make 0.8 wt% glutaraldehyde in PVOH film:
  1. Dissolve 0.5 g PVOH (MW 22000) in 5 mL H₂O by heating and stirring.
  2. Place solution in fume hood to cool to 40-50°C.
  3. Add 0.5 mL 8% glutaraldehyde to the solution, then pour into a Teflon dish and let cool overnight in the fume hood.
• Please refer to Karlena Brown's entry for glutaraldehyde safety precautions.