22° IFATCC INTERNATIONAL CONGRESS · ELECTRO-TEXTILES SEM photos of ink-jet printed Silver colloid...
Transcript of 22° IFATCC INTERNATIONAL CONGRESS · ELECTRO-TEXTILES SEM photos of ink-jet printed Silver colloid...
DEPOSITIONOFNANOPARTICLESUSINGINKJETTECHNOLOGYGiovanniDugnani,TPAspaRiccardoRobustelli,FratelliRobustellisrlUgoZaroli,FOR.TEXsrl
22°IFATCCINTERNATIONALCONGRESSStresa,May5-72010
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TABLEOFCONTENTS
1. TEXTILENANO-TREATMENTS
2. INK-JETTECHNOLOGY
3. NANO-DEPOSITIONANDINK-JET:THESYNERGY
4. APPLICATIONS
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TEXTILENANO-TREATMENTS
Finishingtreatmentsbasedonthedepositofthinnetworksofnano-par[clesonthefabricsurfacearebecomingakeytechnologyinthetex[leindustry.
Theyalloworiginalfunc[onaliza[onsoftex[leandclothing
products.
Differentprocessesareavailable:SiliconSolgel,organicandhybridsolu[onscontainingnano-par[cles(metalsalts,carbonnanotubes,etc.)
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SOL-GELPROCESSES
On trea[ng tex[le substrates with a solu[oncontaining silicon (or other metal) basednanosols, the nanopar[cles condensate andaggregate into a three-dimensional inorganicnetwork due to their quite large surface tovolume ra[o, and ini[ally form a solvent-containinggellayeronthetex[lesurface.Inthesecond step this gel is dried and/or heated toremove solvent from the coa[ng. Finally axerogel layer is obtained, free of solventmolecules and having a porous structure thatmay entrap other nano-par[cles contained intheoriginalsolu[on.
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SILICASOL-GELPROCESSES
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CARBONNANOTUBES
Allotropes of carbon, having a cylindrical structurecons[tutedbythinwrappedupwallsThey have diameters of a few nanometers, andlengthmillions[meslargerAlmostmono-dimensionalstructureCharacterized by extreme tensile strength andelas[citymodulus,veryhighflexibilityTheyshowinteres[ngelectricalproper[es,metallicorsemiconductordepending fromlength,diameterandmorphologyThey have an important role in nanotechnologyengineeringActually used in conduc[ve inks,magne[c shields,thinpaperorfabricbaeeries,supercapacitors
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CARBONNANOTUBES
Scanning electronmicroscopy (SEM) images of carbon nanotubesdepositedonanylonsurface
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GOALSFORFUNCTIONALTEXTILES
Improvedstabilityagainstmechanical,chemical,photochemicalorthermaldamageImprovedrepellencyproper[esagainstwater,oilandstainModifiedlightabsorp[onandemissionproper[es(e.g.UVfiltering)Uniquemagne[cproper[esandelectricalconduc[vity,e.g.,foran[sta[candelectromagne[cprotec[veeffectsImmobiliza[onandcontrolled-releaseofac[vestuff,e.g.an[microbial,therapeu[csubstances,flavours,etc.
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TABLEOFCONTENTS
1. TEXTILENANO-TREATMENTS
2. INK-JETTECHNOLOGY
3. NANO-DEPOSITIONANDINK-JET:THESYNERGY
4. APPLICATIONS
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INK-JETTECHNOLOGY
Ejec[ontechnology
Con[nuous Drop-On-Demand
Piezoelectric Thermal
VariableBinary
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THERMALHEADS
Inkisheatedtoitsboilingtemperaturebyasmallhea[ngelement
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PIEZOELECTRICHEADS
Apiezoelectricelementchangesitsshapeundertheac[onofanelectricalsignal,thuscompressinginkinsidethecell
Piezo
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DROPONDEMANDHEADS
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DROPEJECTION
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HIGHDENSITYHEADS
Implementedwithintegratedcircuittechnology,mostrecentink-jetheadsaeain densi[es exceeding 360 nozzles per inch, andmaymodulate dropvolumes
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INK-JETDOTS
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ESSENTIALSTRUCTUREOFANINK-JETFABRICPRINTINGMACHINE
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TABLEOFCONTENTS
1. TEXTILENANO-TREATMENTS
2. INK-JETTECHNOLOGY
3. NANO-DEPOSITIONANDINK-JET:THESYNERGY
4. APPLICATIONS
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NANO-DEPOSITIONANDINK-JET:ASYNERGETICAPPROACH
Digitalprin[ngtechnologyallowslocaliza[onandpaeerningofnano-treatmentsFunc[onaliza[onisobtainedjustwhereitisrequiredNowastes,noapplica[onofunusedcostlychemicalsOpportunitytocreatetracks,paeernsanddrawingscontainingvariousnano-materialsAsolu[onwai[ngforproblems:newrevolu[onary,exci[ngapplica[onsbecomeconceivable
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TECHNOLOGICALDRAWBACKS
Technologicalhazards:
depositoncellwalls,finallymodifyingejec[onqualitydeposit on nozzle edge, devia[ng the ejecteddropletsnozzlecloggingnozzleedgeerosioncrea[onoflumps
Conceptualsimplicityhidesneedofhighaccuracyandsophis[catedtechnology
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SCOPEOFTHERESEARCH
Op[miza[onofchemical,physicalandthermalcharacteris[csofinksandsolu[onstobeejectedPrecise[mingcontrolandshapingofVoltageWaveformsappliedtopiezocellsMethodsforpreven[nggelforma[onbeforeejec[onTechniquesforkeepingnano-par[clesizesunder100nanometersComposi[onandgeometricstructureofcellsareinves[gatedforavoidinginterac[onwithnano-materialsinthesolu[on
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CONTROLLINGELECTRICWAVEFORMS
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TABLEOFCONTENTS
1. TEXTILENANO-TREATMENTS
2. INK-JETTECHNOLOGY
3. NANO-DEPOSITIONANDINK-JET:THESYNERGY
4. APPLICATIONS
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Glassfiberfabric
Thermochromic,Ionochromic,photochromic
effects
APPLICATIONS
TEXTILEAND
FASHION
Light(UV)absorp[on
Specialdyeing
effects
Ac[veSportswear
SpecialFinishing
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APPLICATIONS
Localreleaseofbio-ac[vestuff,repellents,aromas
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APPLICATIONS
Biomedicalsensors(pressure,mo[on,temperature,dampness,etc.)Pharmaceu[caltreatmentsanddispensersRe-genera[onofhuman[ssues
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Antennas,
RadioFrequencyIden[fica[on
(RFID)
Conduc[vepaeernsfor
electronicdevices
Photovoltaicfabrics
Sensorsofchemicalandphysicalvariables
Wearablecompu[ngdevices
Intelligentinteriortex[les
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ELECTRO-TEXTILES
Conduc[vepolymerresistorsprintedusingink-jettechnology
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ELECTRO-TEXTILES
SEMphotosofink-jetprintedSilvercolloidondifferentsubstrates.NB.Bulkcopperhasanelectricalconduc[vityofabout5,8x107
Substrate Paper PET Film Cotton Fabric Print Thickness (micron) 5,29 4,55 7,56 Elect rical Conductivity (S/m) 2,76x105 2,71x105 8,76x104
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ELECTRO-TEXTILES
SEMphotosofsurfacesprintedwithSilvercolloid,alerdifferenttemperaturetreatments
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BENEFITSOFINK-JETNANO-DEPOSITION
Scalable, on-demand technology, limited to specific areas of fabric orclothingitemsNon-contact,speed,flexibility,crea[vity,cleanliness,highresolu[onReduc[onintheuseofchemicalstoachievethedesiredfunc[onaliza[onReducedcostsofexpensivecompoundsEnvironmentfriendly:reducedwaterconsump[on,wastesandpollutantsBeeercomfortandimprovedacceptanceofprotec[vewearImplementa[onofpreciseandsophis[catedpaeernsforvariousinnova[veusesHighleveltechnology,requiringandpromo[ngskilledmanpowerDigitalprin[ngisconceptuallythesimplestprin[ngtechnology:justaprintheadandachemicalsolu[on