Difference between revisions of "User:Karlena L. Brown/Notebook/PVOH Research/2013/02/27"

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(Autocreate 2013/02/27 Entry for User:Karlena_L._Brown/Notebook/PVOH_Research)
 
(PVOH Film Preparations)
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==PVOH Film Preparations==
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==OBJECTIVES==
'''Prepared PVOH films in water:'''
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==Hydrogel Pressure Samples Tested==
* In 10mL beaker, weigh out ~ 0.5 grams PVOH (MW 130,000)
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==Notes==
'''(Actual Mass = 0.4934g)'''
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* The pipettes that provided the best fluorescence results for each sample were both the straight plastic pipette and 90° angle bent pipette.
* Then, using a graduated cylinder add ~ 3 mL H<sub>2</sub>O to the beaker
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* All samples run maintained a composition incorporating Rhodamine 6G dye
* In another 10mL beaker, weigh out ~ 1.0 gram PVOH (MW 130,000)
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* All samples on 2/27/13 were tested using the bent pipette containing the 90° angle. (See figure listed below)
'''(Actual Mass = 0.9965g)'''
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Figure 1. Image of bent pipette used for pressure testing
* Then, using a graduated cylinder add ~ 5 mL H<sub>2</sub>O to the beaker
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[[Image:Bent pipette 2 27 13.jpg]]
 
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<br>
'''Standard PVOH Film Protocol:'''
 
* 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.
 
* 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 H<sub>2</sub>O 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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Revision as of 19:22, 4 March 2013

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OBJECTIVES

Hydrogel Pressure Samples Tested

Notes

  • The pipettes that provided the best fluorescence results for each sample were both the straight plastic pipette and 90° angle bent pipette.
  • All samples run maintained a composition incorporating Rhodamine 6G dye
  • All samples on 2/27/13 were tested using the bent pipette containing the 90° angle. (See figure listed below)

Figure 1. Image of bent pipette used for pressure testing Bent pipette 2 27 13.jpg