User:Tamanika Tinsley/Notebook/Chem 581 Biomaterials Design Lab/2015/01/30

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Jan 30-TiO2 coating with epoxy

Objectives

  1. Find out the right proportions of materials to used
  2. Start one synthesis
  3. Find the proper cross linking temperature

Materials

  1. DER 331, which is an undiluted diglycidyl ether of bisphenol A (DGEBA).
  2. JEFFAMINE® D-400 amine
  3. Titanium Dioxide T696

Measurements

the proportion of Amine to Epoxy should be 1:1 in equivalent weights. The equivalent weight for the epoxy is 182-192 g/mol. The below image shows the equivalent weights of a few Jeffamines

Amine equivilent weights.PNG

The image is from Hunstman's EPOXY FORMULATIONS USING JEFFAMINE® POLYETHERAMINES. Here is the link: http://www.huntsman.com/portal/page/portal/performance_products/Media%20Library/global/files/epoxy_formulations_using_jeffamine_polyetheramines.pdf

Synthesis

  1. measure 3.0559 of JD-400
  2. add 5.5633 g of the epoxy
  3. add 0.8473 g of TiO2
  4. let stir for 5 minutes with temperature of 85C
  5. reduce the temperature to 50C for another 10 minutes.
  6. transport the mixture into an aluminum dish
  7. Let it sit in room temperature till next lab section.

DSC Test

  1. Weigh a pan and a lid, 51.76 mg
  2. add the mixture in the pan and press the lid on it, mixture weight was 9.81 mg
  3. Input into DSC to test for temperature starting at 20C to 200C, adding 5C/min
    1. This test will let us know the optimum temperature for cross linking