User:Jacob Esenther/Notebook/581/2014/09/27

Biomaterials Design Lab

Main project page Previous entry      Next entry

Objective Learning how to begin the synthesis of polymer and polymer-clay films for use in later experiments. Description Perform the following procedures (1 and 2) in parallel for the start to the synthesis of cross-linked polymer and cross-linked polymer-clay films. Polymer-Clay Films Add 7mL of water to 1g of 22,000MW polyvinyl alcohol and 0.11g of sodium montmorillonite in a glass vial Stir the solution with constant heating at 75C until the polymer is dissolved and the clay is dispersed (~15 minutes) Cool the solution to room temperature Add 0.5mL 0.8 wt% glutaraldehyde. NOTE: Perform step 4 in the hood Stir for an additional 3 minutes to ensure homogeneity Pour solution into a teflon dish to dry until the next class Polymer Films Add 7mL of water to 1g of 22,000MW polyvinyl alcohol in a glass vial Stir the solution with constant heating at 75C until the polymer is dissolved (~15 minutes) Cool the solution to room temperature Add 0.5mL 0.8 wt% glutaraldehyde. NOTE: Perform step 4 in the hood Stir for an additional 3 minutes to ensure homogeneity Pour solution into a teflon dish to dry until the next class Data Polymer-Clay Film 1.0010g of 22,000MW polyvinyl alcohol 0.1103g of sodium montmorillonite Polymer Film 1.0024g of 22,000MW polyvinyl alcohol Note - these starting materials were measured out the day before by Dr. Hartings in preparation for the experiment. Notes During the initial heating process. The temperature was raised above 75C to help the solids dissove. The stirring was monitored to prevent boiling of the solution.