1 Final Design Review Stephanie Moran, Ryan Rosario, Zachary Stauber, Bethany Tomerlin, Juan Carlos Ybarra

2 Outline of Presentation Goals For Prototype Conductivity In Carbon Filled Elastomers Polymer Selection Processing Methods Improvements In Experimental Design How Our Proposed Device Compares to Existing Products Gantt Chart

3 Minimum Goals for Strain Sensor Prototype Minimum Requirements: MC Text output of Strain vs. Resistance Sensor

4 Ideal Goals for Prototype: Glove Design Ideal Prototype: MC Output: Resistance vs. Strain Position of sensor

Thermoplastic Polyurethane Elastomers RTV polyurethanes RTV silicone rubbers 5 Many polymers can serve as a possible insulating matrix for the strain sensors.

6 Electrons tunnel through the insulating matrix to nearby conductive carbon black particles. Polymer matrix Carbon black particle e-e-

7 RTV polyurethanes vulcanize when polyols are added to isocyanate-terminated pre-polymers. Addition of polyol

8 Current Processing Technique

9 Removal of Bubbles With Pasta Maker Succeeded

10 A Vacuum failed to Sufficiently Remove Bubbles

11 New Instron Testing Set-up Eliminates Torsion of Polymer Voltage Current

12 Conductive Rubber Bands Product on the Market

KLM Series reads strain up to 20% Foil/ Resin based gauge Foil gauges elongations < 5% Cheap “art form” to properly place electrical output needed Comparison of our product to other Commercial Over the Shelf Strain Gauges

Carbon Black $1.5325/ lb Current Rubber $5.37/ lb retail Relative Cost ~50 Strain gauges per pound of raw material A Preliminary Breakdown of the Cost of the Sense-On Strain Gauge