User:Melissa Novy/Notebook/CHEM-581/2012/11/20

From OpenWetWare

(Difference between revisions)
Jump to: navigation, search
(UV-Vis of Salt-Exchanged PVOH Films)
Line 30: Line 30:
** PVOH(22K) 1.0073 g + 1 mL GA + 1 mL PP
** PVOH(22K) 1.0073 g + 1 mL GA + 1 mL PP
** PVOH(22K) 1.05225 g + 0.5 mL GA + 1 mL PP
** PVOH(22K) 1.05225 g + 0.5 mL GA + 1 mL PP
-
* Note that all films were stored in H<sub>2</sub>SO<sub>4</sub> solution prior to being soaked in the salt solutions.
+
* Note that all films were stored in 2 wt% H<sub>2</sub>SO<sub>4</sub> solution prior to being soaked in the salt solutions.
* Immediately after being placed in the three salt solutions, the PVOH(22K) 1.05225 g + 0.5 mL GA + 1 mL PP films became colorless.
* Immediately after being placed in the three salt solutions, the PVOH(22K) 1.05225 g + 0.5 mL GA + 1 mL PP films became colorless.
 +
<br>
 +
{| {{table}}
 +
| align="center" style="background:#f0f0f0;"|'''Film [ ]'''
 +
| align="center" style="background:#f0f0f0;"|'''Salt Solution [ ]'''
 +
| align="center" style="background:#f0f0f0;"|'''Film Thickness [mm]'''
 +
| align="center" style="background:#f0f0f0;"|'''Color [ ]'''
 +
|-
 +
| PVOH(22K) 1.0073g, 1mLGA, 1mLPP||Al<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub>||0.6||Green
 +
|-
 +
| PVOH(22K) 1.0073g, 1mLGA, 1mLPP||Na<sub>2</sub>SO<sub>4</sub>||0.5||Pink
 +
|-
 +
| PVOH(22K) 1.0073g, 1mLGA, 1mLPP||Fe<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub>||0.6||Pink
 +
|-
 +
| PVOH(22K) 1.05225g, 0.5mLGA, 1mLPP||Al<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub>||0.6||Transparent
 +
|-
 +
| PVOH(22K) 1.05225g, 0.5mLGA, 1mLPP||Na<sub>2</sub>SO<sub>4</sub>||0.1||Transparent
 +
|-
 +
| PVOH(22K) 1.05225g, 0.5mLGA, 1mLPP||Fe<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub>||0.4||Transparent
 +
|-
 +
| PVOH(22K) 1.0067g, 1mLGA, 1mLPP, HCl||Al<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub>||0.9||Green
 +
|-
 +
| PVOH(22K) 1.0067g, 1mLGA, 1mLPP, HCl||Na<sub>2</sub>SO<sub>4</sub>||1||Pink
 +
|-
 +
| PVOH(22K) 1.0067g, 1mLGA, 1mLPP, HCl||Fe<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub>||0.9||Pink
 +
|}
 +
<br><br>
 +
[[Image:PVOH%2822K%29_1mLGA%2C_1mLPP%2C_HCl.jpg]]
 +
<br><br>
 +
[[Image:PVOH%2822K%29_1mLGA%2C_1mLPP.jpg]]
 +
<!-- ##### DO NOT edit below this line unless you know what you are doing. ##### -->
-
 
-
<!-- ##### DO NOT edit below this line unless you know what you are doing. ##### -->
 
-
|}
 
__NOTOC__
__NOTOC__

Revision as of 22:13, 25 November 2012

Search this Project

Customize your entry pages

Objectives

  • Run UV-vis on salt-exchanged PVOH(22K) + GA + PP films.

UV-Vis of Salt-Exchanged PVOH Films

  • Protocol
    1. Place film in 20 mL 10 mM Fe2(SO4)3.
    2. Time how long it takes for the film to change color from green to pink.
    3. Remove film from salt solution, pat dry with KimWipes, and cut with a 3.5 mm film cutter.
    4. Measure the thickness of the film with calipers, then place it in a quartz cuvette and take a spectrum from 200 nm to 800 nm.
    5. Place the film back in its H2SO4 solution.
    6. Discard the salt solution into a waste container.
    7. Repeat the above steps in 20 mL solutions of Al2(SO4)3 and Na2SO4.
  • The following films were analyzed with this protocol:
    • PVOH(22K) 1.0067 g + 1 mL GA + 1 mL PP + HCl
    • PVOH(22K) 1.0073 g + 1 mL GA + 1 mL PP
    • PVOH(22K) 1.05225 g + 0.5 mL GA + 1 mL PP
  • Note that all films were stored in 2 wt% H2SO4 solution prior to being soaked in the salt solutions.
  • Immediately after being placed in the three salt solutions, the PVOH(22K) 1.05225 g + 0.5 mL GA + 1 mL PP films became colorless.


Film [ ] Salt Solution [ ] Film Thickness [mm] Color [ ]
PVOH(22K) 1.0073g, 1mLGA, 1mLPPAl2(SO4)30.6Green
PVOH(22K) 1.0073g, 1mLGA, 1mLPPNa2SO40.5Pink
PVOH(22K) 1.0073g, 1mLGA, 1mLPPFe2(SO4)30.6Pink
PVOH(22K) 1.05225g, 0.5mLGA, 1mLPPAl2(SO4)30.6Transparent
PVOH(22K) 1.05225g, 0.5mLGA, 1mLPPNa2SO40.1Transparent
PVOH(22K) 1.05225g, 0.5mLGA, 1mLPPFe2(SO4)30.4Transparent
PVOH(22K) 1.0067g, 1mLGA, 1mLPP, HClAl2(SO4)30.9Green
PVOH(22K) 1.0067g, 1mLGA, 1mLPP, HClNa2SO41Pink
PVOH(22K) 1.0067g, 1mLGA, 1mLPP, HClFe2(SO4)30.9Pink



Image:PVOH(22K)_1mLGA,_1mLPP,_HCl.jpg

Image:PVOH(22K)_1mLGA,_1mLPP.jpg


Personal tools