1 Prototype Presentation Stephanie Moran, Ryan Rosario, Zachary Stauber, Bethany Tomerlin, Juan Carlos Ybarra

2 We modified our goals to more suitably match our application 1.Inexpensive 2.High Elongation (>10%) 3.Fast Response Time 4.Precision

3 Current Improved Processing Setup Weighing Carbon BlackIncreased Mixing Time Using Katjen Carbon Black Increased Surface area: 1400 m2/g Typical Carbon Black is m2/g

Future Improvements to Processing Moving to a Silcone Rubber - 20:1 Mixing Ratio -Increase mixing Time Purchasing A Dispersion Blade Placing Samples Under Hot Press to Cure

5 Four-point resistance measurements eliminate errors due to changing contact resistance.

6 An automatic data acquisition setup allows for a faster sample rate. Multimeter Strain vs. Time Voltage Output Resistance Output

8 Sensor Arrangement and Data Processing Final Design: MC Arduino Output: Resistance vs. Strain Position of sensor MultiplexerAmp Bread Board

9 Requirements for Final Design Glove Requirements: Flexible Relatively rigid substrate for strain measurement MC Possible Solutions: Integrating sensor into fabric of glove Create a glove with selective rigid sections Molds with depth much smaller than those being used Cut samples with proper shape. Sensor Requirements: Thinner More elastic at higher strain rates

Any Questions? 10

11 Conduction in the composite cannot be explained by tunneling, but can be modeled by Mean Field Theory. e-e- e-e- 30nm

12 LabView Program

13 Complete Circuit Design MC

Normalization of Data

15 Comparisons of Processing Techniques

16 Comparisons of Processing Techniques

17 Failure vs. Hole Radius Size

18 Increase in Bubble Size Under Vacuum

Porosity Characterization of Carbon Filled Elastomers MC Voids Seen Under Confocal Microscope 10X200X