User:Karlena L. Brown/Notebook/PVOH Research/2012/09/19

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PVOH Film Preparations

Prepared PVOH films in water:

  • In 10mL beaker, weigh out ~ 0.5 grams PVOH (MW 130,000)

(Actual Mass = 0.4934g)

  • Then, using a graduated cylinder add ~ 3 mL H2O to the beaker
  • In another 10mL beaker, weigh out ~ 1.0 gram PVOH (MW 130,000)

(Actual Mass = 0.9965g)

  • Then, using a graduated cylinder add ~ 5 mL H2O to the beaker

Standard PVOH Film Protocol:

  • After adding and combining PVOH (MW 130,000) in small beakers with H2O, add stir bars and prepare to stir solution.
  • On hot plate, stir and heat both beaker solutions at 70-80°C for ~ 12 min or until PVOH dissolves.
  • Once PVOH solids thoroughly dissolve in solution, pour each solution in a Teflon dish to sit, cool, and dry in a fume hood for ~ 1 day.

Notes:

  • An additional 2-3 mL H2O was added to each solution to aid the dissolving of the PVOH
  • Heat was reduced when solutions began to boil too rapidly
  • While transferring solutions to Teflon dishes, loss of sample within the small beakers (sample loss = incomplete sample transfer)



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