TecInTex:

Technology Integration into Textiles:

Empowering Health

Gerhard Tröster

April 27, 2012 G. Tröster

Structure

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

F. Clemens)– CSEM Neuchatel (G. Voirin, 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

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‚Healthcare Demonstrators‘

• NIRS (Near Infrared Spectroscopy) in socks images O2

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

enough O2

lack of O2

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

Light Source

Detector

High decubitus risk pressurehumiditytemperatureoxygenation

April 27, 2012 G. Tröster

Highlights

• E-fibers• O-fibers• E-stripes

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April 27, 2012 G. Tröster

Metal/plasma polymer nanocomposite coatings

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TEM micrographs of Ag/C:H plasma polymer coating with microstructure in the percolation region.

resistivity sensitive to pressure, strain, humidity

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PEDOT:PSS Coatings on Metallized Fibers: Process

Uncoated fiber

Coated fiber

PEDOT:PSS

solution

Heater 1

Heater 2

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PEDOT:PSS Coatings on Metallized FibersConductivity

PEDOT:PSS with 10% dopant

PEDOT:PSS with 10% DMSO

Doping Multi-Layer

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PEDOT:PSS Coatings on Metallized FibersResults

Uncoated silver metallized PA fiber

Thin Coatings on Single Fibers

Uncoated silver metallized PA fiber

30µm100µm

Coated with PEDOT:PSS750 nm

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Pressure Sensor based on elastic polymer fibers

www.empa.ch/lpp

applied pressure

out-coupled light

out-coupled lightOptical Fiber

Light Intensity I0Light Intensity I1

0 50 100 150 200 250 300 350 4000%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

Time [s]

Nor

mal

ized

sig

nal

Sensitivity 0.2 N/cm to 20 N/cm .

April 27, 2012 G. Tröster

Biosensing using optical fibers

• Monitoring of pH and protease activity on the skin, e.g. in chronic wounds

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April 27, 2012 G. Tröster

pH- Sensing

• pH dyes encapsulated in porous sol-gel

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pH

April 27, 2012 G. Tröster

Protease (MMP9) activity detection

• Digestion of colored layer

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MMP980 µg/mL

30 µg/mL

200 µg/mL

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Prototype for sensing optical fibers

LabView Interface

Fluidic cell

Acquisition card and optics

PD

Real-time pH measurement in 10% blood serum

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Opto-electronic components for prototype

Optical couplers

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Perfusion measurement with POF

April 27, 2012 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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April 27, 2012 G. Tröster

Weaving using Production Tools

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• ~ 1.6 m wide• Stripes 1 – 2 mm

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Embroidery

45 cm

18 cm

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Gas sensors with Carbon-Black:Process flow• Polymers: PVP, PVUB, PIB, PS

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Gas sensors: sensitivity

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Sensor Fusion (PCA Principal Component Analysis)

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IGZO-bendable 1μm-TFTs:

Thin film devices fabricated on flexible plastic substrate

April 27, 2012 G. Tröster

Outlook

• Design and validation of the demonstrators– ethical approval– biocompatibility approval– clinical setting– pilot studies

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