tecintex 2010

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TecInTex:Technology Integration into Textiles:Empowering Health

Gerhard Trster

Structure

Partners

ETH Zrich (G. Trster, K.Cherenack: Electronics Lab)

EMPA St Gallen, Dbendorf (R.Rossi, M.Heuberger, F. Clemens)

CSEM Neuchatel(S.Pasche, J. Luprano)

University Hospital Zurich (M. Wolf)

Paraplegic Center Nottwil (U.Baumberger)

industrial partners

Sli de 2 April 29 , 2010

started July 1st, 2009

4 years

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Why Technology in Textiles ?

Monitoring the human body

Disease prevention (pressure ulcers, )

Tracking of vital body functions (ECG, temperature, arterial oxygenation,

ventilation, )

Monitoring the environment

Sensing temperature, humidity, motion, strain,

Heating, illumination (e.g. in cars and airplanes)


Impact at Swiss texti e in ustry: 11000 employees (2007)

annual growth rate of functional textile: up to 25%

State-of-the-Art E-Textiles

Toda few sensin ca abilities on textile available:

Skin electrodes, heating elements, touch pads, membranes,

First products available commercially:

Sport belts (Polar)

Heated gloves and ski jackets

Road blocks

Slide 4 April 29, 2010

Loss of textile properties (touch, washability,)

Connections between textile electronic components and environment

Poor sensing capabilities at fiber level

Insufficient manufacturing processes, materials, packaging

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Approach

Fibres

E-Fibers

Conductive

Integrated sensors

O-Fibers

Flexible optical fibres

Fabrics

Demonstrators

healthcare


Healthcare Demonstrator : NIRS in Socks

NIRS Near Infrared S ectroscoimages O2 Early detection and

treatment of peripheral

vascular disease (PVD) (affects 30% of >65 years):

Impaired blood flow to muscle

Lack of oxygen

enough O2

lack of O2

LightSource

Detector

Slide 6 4. November 2008

Goal

on-line and non-invasive measurement of tissue oxygenation in muscles

20 emitters and 20 photo diodes integrated in a sock

using optical fibres, conductive fibres, transducers and attached ICs

pilot study in subjects with risk factors for peripheral vascular disease

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Healthcare Demonstrator: Intelligent underwear

for paraplegic people to prevent and to treat ulcer

High decubitus risk


Continuous measurement of pressure distribution, temperature and

humidity for prevention of ulcers; and of wound exudates (pH,

concentration of typical proteins) in case of ulcers

using bio-fibres, sensor stripes, conductive fibres, transducers

pilot study in healthy subjects and in paraplegics

E-Fibres

Metallization of fibers usin lasma s utterin rocess

Surface modifications

( anti-corrosion, wetting)

Development of suitable coating without adversely

affecting textile properties


www.empa.ch/advancedfibers

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Metallized fibers/ yarns

Air-to-air rocess s eed >100 m/min

- He/O2 plasma cleaning/activation

- Ag sputtering ( Argon)


500 nm

Ag-coated conductive, textile yarns


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Flexible PU Based Coatings

Metallized Polyamide

~

PU Coated Metallized

Polyamide Monofilament~

Polyurethane

polymer


-

Thickness of films

~ 5-15 m

Melt Coating

Filament Wire coating("co-extrusion")

Polymer

melt

Wire coating die

insulation layers


coated

filament

uncoa e amen

conducti ng layer (Ag)

insulation l ayer

(polymer)

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Piezoresistive strain sensor fibres


O-Fibres: Polymeric Optical Fibers for Fabrics

POF

lightingtherapy


sensing

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Bi-component FibresSpider:

bi-com onent ol meric o tical fibres


Zeonor(core)-PMMA(cladding)

Problem: PMMA too brittle (even for cladding material)

Next step: testing of fluorated polymers as

cladding material (-> THV 815)

Biosensing

Develo ment of o tical fibres for biosensin and

integration in textile

Electronic and signal processing for optical fiber based

sensor


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Optical fibres for sensing

Based on light absorption / fluorescence / chemiluminescence

ens ve coa ng so -ge , y roge

Incorporation of indicator chemistry (transduces changes in the analyte

concentration)

Evanescent wave sensing (along optical fibre)


Multifunction probes based on multiwavelength analysis and mixed indicator sensor

Relevant markers for chronic wounds

Wound healing phases and chronic wounds (pressure ulcers)

Selected markers (in exudates)


pH

Proteases (e.g. MMPs)

Lactate

Multi-parametric

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Measurement set-up (prototype)

LabVIEW

analysis

Weaving of optical fibres


sensing zoneFluidic cells

pH sensing with optical fibres

Glass optical fibre, diameter 200m

LED

Photodetector

Sol-gel coating + pH dyes

Reversible, real-time pH monitoring

2 cm


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Flexible Sensor Stripes and Fibres

Planar thinfilm technology Sensors

Transistors

Integrated circuits

Small (< 0.5mm) stripes woven into

textiles

Sli de 22 April 29, 201 0

Weaving and mechanical strain

Bendin radii 1 0 m

Cracking of

interconnects

Patterning of copper

reduces minimum

R = 165m


Electronic fiber 200m

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Sensors

Temperature

100 nm gold

500m

Strain gauge


Humidity

PEDOT.PSS

200m

Sensing layer

Thin Film Transistors

ZnO zinc-oxide

IGZO

(indium gallium zinc-oxide)500m

Bending performance


IGZO

TFT

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Sensorized Shirt

Temperature


Challenges

Inte ration of technolo ies and tools in the industrial

manufacturing processes

Transfer to Swiss textile industry

Sli de 27 April 29, 201 0

tecintex 2010

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