User:Karlena L. Brown/Notebook/PVOH Research/2012/09/28

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(Autocreate 2012/09/28 Entry for User:Karlena_L._Brown/Notebook/PVOH_Research)
(PVOH Film Preparations)
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==PVOH Film Preparations==
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==OBJECTIVES==
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'''Prepared PVOH films in water:'''
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# Run X-ray Diffraction of 2:1 Clay-α-Fe<sub>2</sub>O<sup>4</sup>
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* In 10mL beaker, weigh out ~ 0.5 grams PVOH (MW 130,000)
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# Calculate the amount of Na<sup>+</sup> ions in the 2000ppm SO<sub>4</sub><sup>2-</sup> solution
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'''(Actual Mass = 0.4934g)'''
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# Calculate the amount of Cu<sup>2+</sup> ions in the 2000ppm SO<sub>4</sub><sup>2-</sup> solution
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* Then, using a graduated cylinder add ~ 3 mL H<sub>2</sub>O to the beaker
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# Calculate the amount of Na<sup>+</sup> ions in the 20ppm SO<sub>4</sub><sup>2-</sup> solution
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* In another 10mL beaker, weigh out ~ 1.0 gram PVOH (MW 130,000)
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# Calculate the amount of Cu<sup>2+</sup> ions in the 20ppm SO<sub>4</sub><sup>2-</sup> solution
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'''(Actual Mass = 0.9965g)'''
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* Then, using a graduated cylinder add ~ 5 mL H<sub>2</sub>O to the beaker
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'''Standard PVOH Film Protocol:'''
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==X-Ray Diffraction Instructions==
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* After adding and combining PVOH (MW 130,000) in small beakers with H<sub>2</sub>O, add stir bars and prepare to stir solution.
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==Na<sup>+</sup> and Cu<sup>2+</sup> Ion Calculations in 2000ppm SO<sub>4</sub><sup>2-</sup> Solutions==
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* On hot plate, stir and heat both beaker solutions at 70-80°C for ~ 12 min or until PVOH dissolves.
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==Na<sup>+</sup> and Cu<sup>2+</sup> Ion Calculations in 20ppm SO<sub>4</sub><sup>2-</sup> Solutions==
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* 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.
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'''Notes:'''
'''Notes:'''

Revision as of 02:27, 5 October 2012

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OBJECTIVES

  1. Run X-ray Diffraction of 2:1 Clay-α-Fe2O4
  2. Calculate the amount of Na+ ions in the 2000ppm SO42- solution
  3. Calculate the amount of Cu2+ ions in the 2000ppm SO42- solution
  4. Calculate the amount of Na+ ions in the 20ppm SO42- solution
  5. Calculate the amount of Cu2+ ions in the 20ppm SO42- solution

X-Ray Diffraction Instructions

Na+ and Cu2+ Ion Calculations in 2000ppm SO42- Solutions

Na+ and Cu2+ Ion Calculations in 20ppm SO42- Solutions

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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