BioE118HW_3

BioE118HW_3 - MSE/BioE C118- Biological Performance of...

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MSE/BioE C118- Biological Performance of Materials Homework # 3 Due Date: 10/4/11 1. Andrade (’73) discussed the minimum interfacial free energy hypothesis for optimum blood-materials performance. The paper, posted on bspace, has valuable information for this problem. Calculate γ SL for the following systems using the Fowkes approximation for the work of adhesion (W SL ). a. Water-glass (SiO 2 ) [Laboratory containers, early cell culture surfaces]. b. Water-polystyrene (PS) [Tissue culture surfaces, plasticware} c. Water-polyethylene terephthalate (PET) [Vascular graft] d. Water-polytetrafluoroethylene (PTFE) [Vascular graft] e. Based on the above calculations, which of these surfaces will result in the least amount of protein adsorption? Which type of material would be an even better choice for minimizing protein adsorption? Explain your answers. 2. Develop the following relationship starting with the Young and DuPré equations. Assume 100% relative humidity along with a low energy surface. How would you use
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This note was uploaded on 01/25/2012 for the course BIOE 118 taught by Professor Hayleylam during the Fall '11 term at Berkeley.

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BioE118HW_3 - MSE/BioE C118- Biological Performance of...

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