User:Tamanika Tinsley/Notebook/Chem 581 Biomaterials Design Lab/2014/10/29

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Oct 29- PVA + Clay beads

  • Group Members Andrew Farag Sr (Undergrad) and Michael Bible Jr (Undergrad)
  • Group Name : AMT

Objective

Attempt to create beads using the PVA with clay and cross linking it with 10% HCl suspended in acetone.

Notes

PVA with clay was mixed using the procedure from Aug 27

Weights

  • PVA 1.006g
  • Clay 0.1118g

After the PVA with clay was mixed and cooled to room temperature 0.50 mL of glutaraldehyde was added. This mixture was then added drop wise to a burette that was filled with a solution of 20 mL %10 HCl and 60 mL of acetone (1:3 ratio).

As shown in the following video My Chemistry Movie it was observed that the PVA with clay created fibers while cascading down the burette. However once the fibers settle on the bottom a hydrogel is formed.

This process was repeated with a more viscous prepped PVA with clay by using five mL of water instead of seven. The results were the same. The PVA with clay was then centrifuged at 13200 RPM for three minutes to try and get any bubbles out of the mixture before added it to the %10 HCL and acetone solution. The results were the same. In addition it was noticed that the centrifuging dropped some of the clay out of suspension from the PVA.