prototype presentation

1Prototype Presentation

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

2We modified our goals to more suitably match our application

1. Inexpensive

2. High Elongation (>10%)

3. Fast Response Time

4. Precision

3Current Improved Processing Setup

Weighing Carbon Black Increased Mixing Time

Using Katjen Carbon BlackIncreased Surface area: 1400 m2/g

Typical Carbon Black is 100-500 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

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

6An automatic data acquisition setup allows for a faster sample rate.

Multimeter

Multimeter

Strain vs. Time Voltage Output

Resistance Output

8Sensor Arrangement and Data Processing

Final Design:

MC

Arduino

Output:•Resistance vs. Strain•Position of sensor

Multiplexer Amp

Bread Board

9Requirements 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

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

e-e-

30nm

12LabView Program

13Complete Circuit Design

MC

Normalization of Data

15Comparisons of Processing Techniques

16Comparisons of Processing Techniques

17Failure vs. Hole Radius Size

18Increase in Bubble Size Under Vacuum

Porosity Characterization of Carbon Filled Elastomers

MCVoids Seen Under Confocal Microscope

10X 200X