User:Karlena L. Brown/Notebook/PVOH Research/2013/02/04: Difference between revisions
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* Filter surfactant exchanged modified clays | * Filter surfactant exchanged modified clays | ||
* Complete freeze and thaw crosslinked clay cycle #1 | * Complete freeze and thaw crosslinked clay cycle #1 | ||
==90:10 PVOH Clay Microsphere Preparations== | |||
# In 10mL beaker, weigh out ~ 0.9 grams PVOH (MW 146K) | |||
# Then, using a graduated cylinder add ~ 6 mL H<sub>2</sub>O to the beaker | |||
# After adding and combining PVOH (MW 146K) in a small beaker with H<sub>2</sub>O, add a stir bar to stir solution | |||
# On hot plate, stir and heat beaker solutions at 70-80°C for ~ 1 hour or until PVOH dissolves | |||
# Once PVOH solids thoroughly dissolve in solution, then add ~ 0.1 gram of clay to the solution | |||
# Continue stirring the solution until a homogenous mixture forms and the clay is equally distributed | |||
# Allow the solution to cool to 40-50°C, and then remove the stir bar from the solution | |||
# Then place the solution into the freezer at -20°C to freeze for ~ 24 hours | |||
# The next day, remove the hydrogels in the freezer in order that the substances can thaw for ~ 24 hours | |||
# Continue the crosslinking freezing and thawing method for ~ 3 days | |||
==Clay Exchanged Solutions & Vacuum Filtration Procedures== | ==Clay Exchanged Solutions & Vacuum Filtration Procedures== |
Revision as of 15:46, 10 February 2013
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OBJECTIVES
90:10 PVOH Clay Microsphere Preparations
Clay Exchanged Solutions & Vacuum Filtration ProceduresThe 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
NotesACCIDENTALLY PLACED THIS ENTRY ON THE FEBRUARY 4th; HOWEVER, THIS ENTRY SHOULD BE UNDER FEBRUARY 6th. THANK YOU.
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