User:Elizabeth Ghias/Notebook/Experimental Chemistry/2013/02/15: Difference between revisions
From OpenWetWare
(Autocreate 2013/02/15 Entry for User:Elizabeth_Ghias/Notebook/Experimental_Chemistry) |
No edit summary |
||
(2 intermediate revisions by the same user not shown) | |||
Line 10: | Line 10: | ||
==Objective== | ==Objective== | ||
To crosslink the films prepared last class, to try the new reaction with (S)-(-)-(3-Chloro-2-hydroxypropyl)trimethylammonium chloride | |||
==Description== | ==Description== | ||
<u>Crosslinking Films</u> | |||
# Heat 5 beakers with 100 mL of 0.7 M HCl | |||
# Once heated to 70 °C add the five films. | |||
# Heat the films for 1 hour | |||
# Prepare 5 solutions of 1.68 g sodium bicarbonate in 100 mL water | |||
# Rinse the films in distilled water, then place in sodium bicarbonate solution. | |||
# Allow to soak in bicarbonate solution for 15 minutes. | |||
# Rinse films in distilled water and then dry to run DSC. | |||
<u>(S)-(-)-(3-Chloro-2-hydroxypropyl)trimethylammonium chloride Reaction</u> | |||
# Measure out 4 samples of 2 g PVOH (MW = 22,000) | |||
# Measure out 0.85779 g (S)-(-)-(3-Chloro-2-hydroxypropyl)trimethylammonium chloride. Place in 5 mL 0.2 M NaOH prepared last class) | |||
#* Actual amount used = 0.8581 g | |||
# Transfer 0.5 mL, 0.05 mL, and 0.005 mL into 4.5 mL, 4.95 mL and 4.995 mL 0.2 M NaOH, respectively (this means the 10% film will be slightly less than 10% but we can still calculate what percentage)→ using 10 mL total volume b/c were doing 2 gram scale. For 1 g scale use 5 mL. | |||
# Place the 4 samples of PVOH in 5 mL | |||
# Allow to soak in the NaOH for 30 minutes | |||
# Add 1 sample PVOH to one of the ammonium chloride samples and allow them to mix for 1 hour | |||
# If the PVOH is still soluble in NaOH, add acetone to precipitate it out. (keep water to a minimum) | |||
# Then do a quick wash with ice water to get precipitate out extra ions | |||
==Data== | ==Data== | ||
No results were collected today | |||
==Notes== | ==Notes== | ||
* When the acetone was added to precipitate out the modified PVOH, the PVOH precipitated out as a white solid (looked like cotton) | |||
* The samples will be filtered next class | |||
Revision as of 12:24, 22 February 2013
Experimental Chemistry | <html><img src="/images/9/94/Report.png" border="0" /></html> Main project page <html><img src="/images/c/c3/Resultset_previous.png" border="0" /></html>Previous entry<html> </html>Next entry<html><img src="/images/5/5c/Resultset_next.png" border="0" /></html> |
ObjectiveTo crosslink the films prepared last class, to try the new reaction with (S)-(-)-(3-Chloro-2-hydroxypropyl)trimethylammonium chloride DescriptionCrosslinking Films
DataNo results were collected today Notes
|