SlideShare a Scribd company logo
Margaret Campbell1, Paramjot Singh2, Kunal Kate2, Cindy K.
Harnett2
1University of Kentucky College of Engineering
2University of Louisville J.B. Speed School of Engineering
harnettlab.org
a.Heat shrink thread and tubing
b.Acetone-soluble thread
c.Water-soluble thread
d.Low melting point polymer thread
e.Polymer tubes
h.Silver plated nylon
conductive thread
g.Stainlesssteel conductive thread
f.Carbon composite polymer stretch sensor
j.Stretchable metal coils
k.Magnet wire
i.Coiled polymer actuator
n.Deformable ber
optic sensor
m.Silicone coated multi-strand wire
l.Resistive heater wire
o.Elastic thread
p.Woolly elastic thread
q.Expandable braided
sleever.High tensile strength polyethylene
t.High tensile strength Kevlars.Hollow porous ber
1 cm
a.Heat shrink thread and tubing
b.Acetone-soluble thread
c.Water-soluble thread
d.Low melting point polymer thread
e.Polymer tubes
h.Silver plated nylon
conductive thread
g.Stainlesssteel conductive thread
f.Carbon composite polymer stretch sensor
j.Stretchable metal coils
k.Magnet wire
i.Coiled polymer actuator
n.Deformable ber
optic sensor
m.Silicone coated multi-strand wire
l.Resistive heater wire
o.Elastic thread
p.Woolly elastic thread
q.Expandable braided
sleever.High tensile strength polyethylene
t.High tensile strength Kevlars.Hollow porous ber
1 cm
Total
internal
reflection
http://hyperphysics.phy-astr.gsu.edu/hbase/optmod/fibopt.html
4
5
•
•
Limiting factor: de-adhesion of the
coating 6
7
8
•
•
•
9
•
•
•
10
•
11Ceron, Steven, Cohen, Itai, Shepherd, Robert F., Pikul, James H., and
Harnett, C. K. 2018. “Fiber Embroidery of Self-Sensing Soft Actuators.”
Biomimetics 3 (3): 24–37
•
location information
•
•
•
•
tut.fi//ms/muo/vert/5_rubber_chemistry/SR_thermoplastic_rubbers.
12
I = I0e-αz
We extracted the
attenuation
constant a by fitting light
intensity output from a fiber
cut to different lengths
A 10-cm piece of TPE
fiber extruded below
0.01 mm/s transmits
10,000x more light than
one extruded above 0.2
mm/s
13
•
•
developed a corrugated
texture
14
•
•
•
•
15
•
•
16

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Controlling Thermoplastic Elastomer Optical Properties by Mechanical Processing

Editor's Notes

  1. A commercial material, “Stretch Magic” made with a proprietary process. Light loss noticeably less around bends when we apply a cladding
  2. We used a commercial material for the core. Can we improve and get new properties by extruding our own, doing mechanical processing?
  3. But there’s no location information, because the signal comes from the whole fiber
  4. VersaFlex CL40 from PolyOne Inc. High extrusion speed leads to crystallinity in some materials, PLA, but it’s complex, because it also depends on the rate the fiber is being cooled
  5. Fibers were encapsulated in low-index heat shrink
  6. Shine a laser on the textured surface 90 degrees off-axis and see light come out the end. It could be a good light source given its tendency to scatter in all directions. Until you scatter out all the light
  7. We suspect pores and disorder in the fast material make it easier to swell and more likely to scatter light. Some reports say it’s more crystalline…we need funding to measure that.
  8. We suspect pores and disorder in the fast material make it easier to swell and more likely to scatter light. Some reports say it’s more crystalline…we need funding to measure it