1. G Love Kristin Brodie Jeff Colton Colin Galbraith Bushra Makiya Tiffany Santos

2. Fabrication of Microspheres Used protocol learned at beginning of semester to fabricate PLGA microspheres Homogenizer speed: Paraffin: 3.5, 5 Octadecane: 4, 5 Pipette used to separate water and paraffin Filter used for octadecane (0.22 m)

3. SEM of Microspheres Paraffin Wax Homogenizer speed 5 Average size: 150 m Range: 50 – 300 m

4. SEM of Microspheres (2) Paraffin Wax Homogenizer speed 3.5 Average size: 200 m Range: 50 – 400 m

5. DSC for Octadecane and PEG Octadecane  PEG

6. Heat Flow Model for a Finger Finger assumed to be a cylinder Power = 2  rLq = 2  L(T 1 -T 3 )/R R = Fabric Resistance + BL Resistance FR = 1/k c * ln (r c /r w ) BLR = 1/(r c *h) h = 1.22*(  T/D)^( 1 / 4 ) for a horizontal pipe Approximating values: h~10 W/m 2 K Power~2.5 W A hand can be assumed to be a cylinder r hand = 2*r finger

7. Heat Transfer Through Gloves Heating element in the glove (73cm) Thermistor in and out of the glove Power: 3.6V Current: 0.55A Weight to reduce air flow into glove

8. Heat Flow Results I*V/A = h (T[in] – T[out]) I = 0.55A V = 3.6V A = 0.05m 2 T[in] = 317.42K T[out] = 294.98K h = 1.765 W/m 2 K EventT [in]T [out] 1109.971.5 2112.471.9 3112.671.6 4112.571.1 5112.271.6 6112.171.7 Avg111.9571.57

9. Data for Heating Element Wires Ni:Cr 80:20wt% Ni:Cr:Fe 60:16:24 wt% Stainless Steel Fe:Cr:Ni 70:19:11 wt% Starting Diameter (mm) 0.410.400.375 Area of Wire (in 2 )0.008071.192e-41.7e-4 Suggested Stress (kpsi)12074-130~95 Length of Graph (in)19.521.735 Extension (in)1.952.173.5 Max Load (lbs)24.22117.5 Calculated Stress (kpsi)121107.8102.2

10. Curve for Ni:Cr 80:20wt%

11. Results Ni:Cr 80:20wt% chosen for large elastic region Octadecane preferred over PEG for Heat of crystallization properties Experimental thermal coefficient is similar to theoretical value

12. What Will We Do Next? Phase Change Material Test integrity of PVA Fabricate microspheres of PEG Incorporation of phase change material into fabric DSC of microspheres Heating Elements Test battery with Prof Ceder Incorporation of thermal switch Choose a fabric to get specific thermal properties