User:Matthew R Skorski/Notebook/Cellulose Summer 2014/2014/06/06
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Entry titlePurpose: To create more casting samples and to create more NH4-CNC. Safety: Casting is same as 5/19/2014. The compound used to create more NH4-CNC is Na-CNC. Procedure: The procedure to create NH4-CNC is to take Na-CNC and run it through an ion exchange column to remove the Na and add NH4. Approximately 10 mL of Na-CNC would be run though the column, and collected in a vial, before it would need to be flushed with 10 mL of very pure water, which would not be collected in the vial but instead a waste beaker. The vial of NH4-CNC from the column needs to be frozen on dry ice before being vacuum dried overnight The casting procedure is the same as 5/19/2014. Experimental: The NH4-CNC was made using the method above. The column was run throughout the day, with it being checked on about every 20 minutes. It took about 20-25 minutes, on average, for a mL of CNC to work its way though the column. Over time however the rate at which the CNC went through the column decreased. Once it took about an hour for a mL to work it's way though the column the column was flushed with 10 mL of the pure water. Casting Mass % Mass TiO2 Mass ABS 15.0% 0.1497 g 0.8475 g 25.0% 0.2494 g 0.7502 g 50.0% 0.5000 g 0.4992 g The vials of just TiO2 and acetone were put in at 10:20 and sonicated until 11:30 when they were removed to add the ABS. The vials were sonicated with the ABS from 11:45 to 2:30 and then casted.
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