User:Karlena L. Brown/Notebook/PVOH Research/2013/02/04: Difference between revisions

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==OBJECTIVES==
==OBJECTIVES==
* Begin preparing polyvinyl alcohol microsperes for experimental analysis
* Filter surfactant exchanged modified clays
* Complete freeze and thaw crosslinked clay cycle #1


==Clay Exchanged Solutions & Vacuum Filtration Procedures==
==Clay Exchanged Solutions & Vacuum Filtration Procedures==

Revision as of 15:44, 10 February 2013

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OBJECTIVES

  • Begin preparing polyvinyl alcohol microsperes for experimental analysis
  • Filter surfactant exchanged modified clays
  • Complete freeze and thaw crosslinked clay cycle #1

Clay Exchanged Solutions & Vacuum Filtration Procedures

The clays being filtered are the clays that were prepared on 2/1/13

Setup of a vacuum filtration system: 

  * Clean 250mL Erlenmeyer Filter Flask
  * Large Buchner Funnel
  * Whatman #42 Filter Paper
  * Long Secure Rubber Hose
  1. Filter a clay solution selected using the vacuum filtration system setup
  2. Attach all parts of the apparatus to the vacuum filtrator system
  3. Place a piece of Whatman #42 filter paper in the Buchner Funnel
  4. Turn on the vacuum filtrator system
  5. Check the suction rate to ensure that enough pressure is applied
  6. Pour an exchanged clay solution into the Buchner funnel
  7. Allow vacuum filtration to continue until the clay is completely dry
  8. Discard the aqueous filtrate solution and place it in a labeled waste container
  9. Collect the soil filtrate on the filter paper and scrape it into a small labeled metal pan
  10. Place metal pan with the soil filtrate in the oven to dry for ~ 2-3 days
  11. Wash all glassware and equipment first with H2O and then with acetone for later use

Notes

ACCIDENTALLY PLACED THIS ENTRY ON THE FEBRUARY 4th; HOWEVER, THIS ENTRY SHOULD BE UNDER FEBRUARY 6th. THANK YOU.

  • Clays previously prepared on 2/1/13 only exchanged for ~ 5 days rather than a week.
  • While attempting to filter the clays, due to vacuum filtration moving rather slowly during separation, clays only were filter for ~ 2.5 hours before actually being placed in the oven.
  • The temperature of the oven when the clays were placed in was ~ 90°C.



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