User:Karlena L. Brown/Notebook/PVOH Research/2012/10/31

OBJECTIVES

• Frepare PVOH film with 5-hydroxymethylfurfural
• Run FTIR analysis on all films prepared throughout the semester
• Run ion diffusion experiment on PVOH film and analyze data using Ion Selective Electrode

Furfural Film Preparation

• In 10mL beaker, weigh out ~ 1.0 grams PVOH (MW 22K)

(PVOH 22K Actual Mass = 1.0029g)

• Then, using a graduated cylinder add ~ 5 mL H₂O to the beaker
• After adding and combining PVOH (MW 22K) in a small beaker with H₂O, add a stir bar and prepare to stir solution
• On hot plate, stir and heat beaker solutions at 70-80°C for ~ 12 min or until PVOH dissolves
• Once PVOH solids thoroughly dissolve in solution, take the solution and place it in the fume hood
• Allow the solution to cool then add ~ 0.3g of 5-hydroxymethylfurfural to the solution

(Furfural Actual Mass = 0.3192g)

• Then pour the solution into a Teflon dish to sit, cool, and dry in the fume hood for ~ 2 days

Films Examined using FTIR

RECALL FTIR PROCEDURAL PROTOCOL 9/17/12

Ion Diffusion & Ion Selective Electrode Film Procedures

1. Cut a small piece of the PVOH 22K film

ISE Film Analysis: Varied Ion Solution

A crosslinked PVOH 22K film containing 1mL glutaldehyde that had been exchanged for 10 min in the CuSO₄ solution was used for an Ion Selective Electrode Analysis.

ISE Film Analysis: HPLC Grade H₂O Solution

A crosslinked PVOH 22K film containing 1mL glutaldehyde that had been exchanged for 10 min in the CuSO₄ solution was used for an Ion Selective Electrode Analysis.

Notes

• Experimental readings regarding the Ion Selective Electrode Analysis were taken every 30 minutes; however, for the first reading and recording only a 10 min interval surpassed before a reading was taken.
• The final two readings germane to the Ion Selective Electrode Analysis for the PVOH 22K film containing 1mL glutaldehyde that was exchanged for 10 min with CuSO₄ were taken by Dr. Fox.
• A small leak was detected in the film used after several hours had passed (9:00P).