TecInTex

TecInTex:

Technology Integration into Textiles:

Empowering Health

Gerhard Tröster

May 13, 2011 G. Tröster

Structure

• Partners– ETH Zürich (G. Tröster: Electronics Lab)– EMPA St Gallen, Dübendorf (R.Rossi, M.Heuberger, F.

Clemens)– CSEM Neuchatel (S.Pasche, J. Luprano)– University Hospital Zurich (M. Wolf)– Paraplegic Center Nottwil (U.Baumberger)– industrial partners

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Mission of TecInTex:

Provide the core modules to design and to manufacture sensing and acting textiles

From fibres to clothes to people

Fibres Fabrics Clothes

Evaluation

May 13, 2011 G. Tröster 4/1

‚Healthcare Demonstrators‘

• NIRS (Near Infrared Spectroscopy) in socks images O2

– Early detection and treatment of peripheral vascular disease (PVD)

enough O2

lack of O2

High decubitus risk

• ‚Intelligent‘ underwear for paraplegic people to prevent and to treat ulcer

Light Source

Detector

May 13, 2011 G. Tröster

Highlights

• Fibers e & o– protection– insulation– sensing

• Woven electronics

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May 13, 2011 G. Tröster

PU coatings of silver fibres

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0 5000 10000 15000 20000 25000 30000 350000

0.5

1

1.5

2

2.5

Resistance (Ω/cm)

coat

ing

thic

kn

ess

(mic

ron

s)Coatings thicker than 2 microns have resistance > 1 MΩ

Coating Thickness-2.5 to 3 microns

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Layer-by-Layer Coating

+

P rim er Polyanhydride Polyam ine ActivatedFatty Acid

Silver pure ( corroded)

Silver Gantrez (protective)

PVAm,(protective)

Silver PScMAA

PVAm

PEI

PEI

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Piezoresistive strain sensor fiber

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Tensile Test

-0.5

-0.3

-0.1

0.1

0.3

0.5

0.7

0 100 200 300 400 500 600 700 800

Time [s]

Fo

rce

[N

]

0

5

10

15

20

25

30

Re

sis

tan

ce

[k

Ω]

Force Resistance

5

7

9

11

13

100 150 200 250

Relaxationof 2nd cycle: 1%

Cyclic tensile (ε= 13-30%) test on woven elastic band (L0= 25mm) with 2 integrated piezoresistive sensor fibres

May 13, 2011 G. Tröster

O-Fiber: Polymeric Optical Fibers (POF)

• Glas PMMA Poly(methyl methacrylate) too brittle and too thick ( > 250μm)

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POFlightingtherapy

sensing

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Melt-Spinning Equipment for Bi-component Fiber

Spider:

- Three extruders:-> 2 claddings possible

May 13, 2011 G. Tröster 12/1

First Bi-component Fiber

Light attenuation: 47 dB/m Light attenuation: <10dB/m

Oct/Nov 2010 Dec 2010

May 13, 2011 G. Tröster

Biosensing using optical Fibers

• Monitoring of pH and protease activity in chronical wounds

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May 13, 2011 G. Tröster

Principle

• Sensing layer around the fiber: sol-gel• pH dyes, change in light absorbance

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May 13, 2011 G. Tröster

Flexible polymer optical fibers (POF) for biosensing

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150 µm polymer fiber

Sol-gel coated POF

May 13, 2011 G. Tröster

E-Stripes: Thin film technology into textiles

• Planar thinfilm technology – Sensors– Transistors– Integrated circuits

• Small (< 0.5mm) stripes woven into textiles

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May 13, 2011 G. Tröster 17/1

Weaving Machine

May 13, 2011 G. Tröster

Mechanical strain during Weaving

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Electronic fiber

R = 165µm

200µm

May 13, 2011 G. Tröster

IGZO-TFTs : bendable ?

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Amplifier

Out

VDD

In

Rf

TFT

Out

VDD

In

GND

1 mm

Rf

TFT

Rl

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CO Sensor Polyanaline based

May 13, 2011 G. Tröster

Challenges

• Adaptation to industrial manufacturing processes• Design of the demonstrator

– clinical environment– biocompatibility approval– ethics

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