User:Anh Do/Notebook/CHEM 481 Polymer/2016/09/14: Difference between revisions
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==Beads formation using clay solution== | ==Beads formation using clay solution== | ||
*Create a solution of 2.5 g PVA, 0.275 g NaMT, and 30 mL 10% HCl. | *Create a solution of 2.5 g PVA, 0.275 g NaMT, and 30 mL 10% HCl. | ||
*Mass of PVA meassured = 2.5001 g | **Mass of PVA meassured = 2.5001 g | ||
*0.275 g Bentonite powder is equivalent to 8.89 mL of 3wt% Bentonite solution | **0.275 g Bentonite powder is equivalent to 8.89 mL of 3wt% Bentonite solution | ||
**0.275g*97mL/3g = 8.89 mL | ***Volumn of Bentonite 3wt% solution: 0.275g*97mL/3g = 8.89 mL | ||
* Volumn of HCl = 30 mL, this effectively diluted the whole solution. However, the amount in moles of HCl is the same, which is more important. | ** Volumn of HCl = 30 mL, this effectively diluted the whole solution. However, the amount in moles of HCl is the same, which is more important. | ||
* Place this solution on a hot plate and heat/stir until everything has dissolved. | * Place this solution on a hot plate and heat/stir until everything has dissolved. | ||
* Add 10 mL of this solution to a 50 mL solution of ethyl acetate stirring at 240 rpm in a dropwise manner using a burette. | * Add 10 mL of this solution to a 50 mL solution of ethyl acetate stirring at 240 rpm in a dropwise manner using a burette. | ||
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**Make sure the two vials are of approximately the same mass | **Make sure the two vials are of approximately the same mass | ||
**Take out as much solution as possible from the vials, leaving only the beads inside | **Take out as much solution as possible from the vials, leaving only the beads inside | ||
**Wash the beads with water. | |||
**Neutralize the beads using NaHCO<sub>3</sub> powder. Make sure pH~7. | |||
==Follow up on the film making procedure== | ==Follow up on the film making procedure== |
Revision as of 15:57, 20 October 2016
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Follow up on previous beads formation experiment
Beads formation using clay solution
Follow up on the film making procedure
3% Bentonite Film cross-linking
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