Peb siv cov ncuav qab zib los txhim kho koj qhov kev paub.Los ntawm kev txuas ntxiv mus saib lub vev xaib no, koj pom zoo rau peb siv cov ncuav qab zib.Cov ntaub ntawv ntxiv.
Wearable pressure sensors tuaj yeem pab saib xyuas tib neeg kev noj qab haus huv thiab paub txog kev sib raug zoo ntawm tib neeg-lub computer.Kev siv zog tsis tu ncua los tsim lub siab sensors nrog kev tsim khoom siv thoob ntiaj teb thiab muaj kev nkag siab zoo rau cov neeg kho tshuab kev ntxhov siab.
Kawm: Weave qauv nyob ntawm textile piezoelectric siab transducer raws li electrospun polyvinylidene fluoride nanofibers nrog 50 nozzles.Duab Credit: African Studio/Shutterstock.com
Ib tsab xov xwm luam tawm nyob rau hauv phau ntawv journal npj Flexible Electronics qhia txog kev tsim cov piezoelectric siab transducers rau cov ntaub siv polyethylene terephthalate (PET) warp yarns thiab polyvinylidene fluoride (PVDF) weft yarns.Qhov kev ua tau zoo ntawm kev tsim lub siab sensor nyob rau hauv kev sib raug zoo rau kev ntsuas siab raws li tus qauv weave yog pom nyob rau hauv daim ntaub scale ntawm kwv yees li 2 meters.
Cov txiaj ntsig tau pom tias qhov rhiab heev ntawm lub siab sensor optimized siv 2/2 canard tsim yog 245% siab dua li ntawm 1/1 canard tsim.Tsis tas li ntawd, ntau yam khoom siv tau siv los ntsuas qhov ua tau zoo ntawm cov ntaub ntawv zoo, nrog rau kev flexion, squeezing, wrinkling, twisting, thiab ntau yam tib neeg txav.Hauv kev ua haujlwm no, cov ntaub so ntswg-raws li lub siab sensor nrog lub sensor pixel array nthuav tawm cov yam ntxwv ruaj khov thiab muaj kev nkag siab zoo.
Rice.1. Kev npaj ntawm PVDF threads thiab multifunctional fabrics.Daim duab ntawm 50-nozzle electrospinning txheej txheem siv los tsim cov mats ntawm PVDF nanofibers, qhov twg tooj liab rods raug muab tso rau hauv ib qho sib npaug ntawm txoj siv conveyor, thiab cov kauj ruam yog los npaj peb cov qauv braided los ntawm plaub txheej monofilament filaments.b SEM duab thiab txoj kab uas hla ntawm PVDF fibers aligned.c SEM duab ntawm plaub-ply yarn.d Tensile lub zog thiab lub zog ntawm kev tawg ntawm plaub-ply xov paj raws li kev ua haujlwm ntawm kev sib tw.e X-ray diffraction qauv ntawm plaub-ply yarn qhia pom muaj alpha thiab beta theem.© Kim, DB, Han, J., Sung, SM, Kim, MS, Choi, BK, Park, SJ, Hong, H. R et al.(2022)
Txoj kev loj hlob sai ntawm cov neeg hlau ntse thiab cov khoom siv hluav taws xob hnav tau ua rau muaj ntau yam khoom siv tshiab raws li qhov hloov pauv siab hloov pauv, thiab lawv cov ntawv thov hauv hluav taws xob, kev lag luam, thiab tshuaj tau txhim kho sai.
Piezoelectricity yog ib qho hluav taws xob uas tsim los ntawm cov khoom uas raug rau cov neeg kho tshuab kev nyuaj siab.Piezoelectricity nyob rau hauv cov ntaub ntawv asymmetric tso cai rau ib tug linear reversible kev sib raug zoo ntawm txhua yam kev nyuaj siab thiab hluav taws xob nqi.Yog li ntawd, thaum ib daim ntawm piezoelectric khoom yog lub cev deformed, tus nqi hluav taws xob tsim, thiab vice versa.
Piezoelectric cov khoom siv tuaj yeem siv lub tshuab hluav taws xob dawb los muab lwm lub zog rau cov khoom siv hluav taws xob uas siv lub zog me me.Cov khoom siv thiab cov qauv ntawm cov cuab yeej yog qhov tseem ceeb rau kev tsim cov khoom siv kov raws li electromechanical coupling.Ntxiv nrog rau cov khoom siv hluav taws xob tsis zoo, cov khoom siv hluav taws xob hloov tau yooj yim kuj tau tshawb nrhiav hauv cov khoom siv hnav.
Polymers ua tiav rau hauv nanofibers los ntawm txoj kev electrospinning yog dav siv los ua piezoelectric zog cia khoom.Piezoelectric polymer nanofibers pab txhawb kev tsim cov ntaub-raws li cov qauv tsim rau kev siv hnav los ntawm kev muab cov khoom siv hluav taws xob raws li cov neeg kho tshuab elasticity hauv ntau qhov chaw.
Rau lub hom phiaj no, piezoelectric polymers yog dav siv, nrog rau PVDF thiab nws cov derivatives, uas muaj zog piezoelectricity.Cov PVDF fibers no tau kos thiab spun rau hauv cov ntaub rau kev siv piezoelectric nrog rau cov sensors thiab generators.
Daim duab 2. Cov ntaub so ntswg loj thiab lawv lub cev.Yees duab ntawm ib tug loj 2/2 weft rib qauv mus txog 195 cm x 50 cm.b SEM duab ntawm ib tug 2/2 weft qauv uas muaj ib tug PVDF weft interleaved nrog ob PET puag.c Modulus thiab lim thaum tawg hauv ntau cov ntaub nrog 1/1, 2/2 thiab 3/3 weft npoo.d yog lub kaum sab xis ntsuas rau cov ntaub.© Kim, DB, Han, J., Sung, SM, Kim, MS, Choi, BK, Park, SJ, Hong, H. R et al.(2022)
Hauv kev ua haujlwm tam sim no, cov khoom siv hluav taws xob raws li PVDF nanofiber filaments yog tsim los ntawm kev siv cov txheej txheem 50-jet electrospinning, uas siv 50 nozzles txhawb kev tsim cov nanofiber mats siv lub rotating siv conveyor siv.Ntau yam kev sib txuas yog tsim los ntawm PET xov paj, suav nrog 1/1 (dawb), 2/2 thiab 3/3 weft tav.
Kev ua haujlwm yav dhau los tau tshaj tawm txog kev siv tooj liab rau fiber ntau sib dhos hauv daim ntawv ntawm cov xov tooj sib txuas ntawm fiber ntau nruas.Txawm li cas los xij, kev ua haujlwm tam sim no muaj cov pas nrig tooj liab sib npaug sib nrug ntawm 1.5 cm sib nrug ntawm txoj siv conveyor los pab kho cov spinnerets raws li kev sib cuam tshuam ntawm electrostatic ntawm cov khoom xa tuaj thiab cov nqi ntawm cov fibers txuas nrog tooj liab.
Tsis zoo li yav dhau los tau piav qhia txog cov capacitive lossis piezoresistive sensors, cov ntaub so ntswg siab sensor tau thov hauv daim ntawv no teb rau ntau qhov kev tawm tswv yim los ntawm 0.02 txog 694 Newtons.Tsis tas li ntawd, lub tswv yim ntaub ntawv siab sensor khaws cia 81.3% ntawm nws thawj cov tswv yim tom qab tsib tus qauv ntxuav, qhia txog lub durability ntawm lub siab sensor.
Tsis tas li ntawd, rhiab heev qhov ntsuas ntsuas qhov ntsuas hluav taws xob thiab cov txiaj ntsig tam sim no rau 1/1, 2/2, thiab 3/3 tav knitting pom qhov siab voltage rhiab heev ntawm 83 thiab 36 mV / N rau 2/2 thiab 3/3 tav siab.3 weft sensors pom 245% thiab 50% siab dua rau cov sensors siab, feem, piv rau 24 mV / N weft siab sensor 1/1.
Rice.3. Nthuav daim ntawv thov ntawm daim ntaub puv siab sensor.Ib qho piv txwv ntawm insole siab sensor ua los ntawm 2/2 weft ribbed npuag tso rau hauv ob lub voj voog electrodes kom paub txog forefoot (hauv qab cov ntiv taw) thiab pob taws.b Schematic sawv cev ntawm txhua theem ntawm tus kheej cov kauj ruam hauv txoj kev taug kev: pob taws tsaws, hauv av, ntiv taw sib cuag thiab nqa ceg.c Voltage output signals nyob rau hauv teb rau txhua feem ntawm lub gait kauj ruam rau gait tsom xam thiab d Amplified hluav taws xob signals txuam nrog rau txhua theem ntawm lub gait.e Schematic ntawm tag nrho cov ntaub so ntswg siab sensor nrog ib tug array txog li 12 lub duab plaub pixels nrog conductive kab patterned mus ntes ib tug neeg teeb liab ntawm txhua pixel.f Daim ntawv qhia 3D ntawm cov teeb liab hluav taws xob tsim los ntawm nias tus ntiv tes ntawm txhua pixel.g Lub teeb liab hluav taws xob tsuas yog kuaj pom hauv tus ntiv tes nias pixel, thiab tsis muaj teeb liab sab yog tsim nyob rau hauv lwm pixels, paub meej tias tsis muaj crosstalk.© Kim, DB, Han, J., Sung, SM, Kim, MS, Choi, BK, Park, SJ, Hong, H. R et al.(2022)
Hauv kev xaus, qhov kev tshawb fawb no qhia tau hais tias muaj kev nkag siab zoo thiab hnav cov ntaub so ntswg siab sensor nrog PVDF nanofiber piezoelectric filaments.Cov khoom lag luam siab sensors muaj ntau yam kev tawm tswv yim los ntawm 0.02 txog 694 Newtons.
Tsib caug nozzles tau siv rau ntawm ib qho qauv hluav taws xob spinning tshuab, thiab ib daim lev txuas ntxiv ntawm nanofibers tau tsim los siv cov khoom siv khoom siv raws li tooj liab rods.Raws li kev sib tshuam compression, cov khoom tsim 2/2 weft hem npuag pom qhov rhiab heev ntawm 83 mV / N, uas yog li 245% siab dua li 1/1 weft hem ntaub.
Lub tswv yim tag nrho-woven siab sensors saib xyuas cov teeb liab hluav taws xob los ntawm kev ua rau lawv lub cev txav mus los, suav nrog kev sib tw, khoov, nyem, khiav thiab taug kev.Tsis tas li ntawd, cov ntaub ntawv ntsuas siab no tau muab piv rau cov ntaub ntawv ib txwm nyob rau hauv cov nqe lus ntawm kev ua haujlwm ntev, khaws cia kwv yees li 81.3% ntawm lawv cov txiaj ntsig qub txawm tias tom qab 5 tus qauv ntxuav.Tsis tas li ntawd, lub tshuab tsim cov ntaub so ntswg tau ua haujlwm zoo hauv kev kho mob los ntawm kev tsim hluav taws xob teeb liab raws li ntu ntu ntawm tus neeg taug kev.
Kim, DB, Han, J., Sung, SM, Kim, MS, Choi, BK, Park, SJ, Hong, HR, et al.(2022).Npuag piezoelectric siab sensor raws li electrospun polyvinylidene fluoride nanofibers nrog 50 nozzles, nyob ntawm seb tus qauv weave.Flexible electronics npj.https://www.nature.com/articles/s41528-022-00203-6.
Tsis lees paub: Cov kev xav tau hais tawm ntawm no yog cov neeg sau ntawv hauv nws tus kheej lub peev xwm thiab tsis tas yuav cuam tshuam cov kev xav ntawm AZoM.com Limited T / A AZoNetwork, tus tswv thiab tus neeg teb xov tooj ntawm lub vev xaib no.Qhov kev lees paub no yog ib feem ntawm cov ntsiab lus ntawm kev siv lub vev xaib no.
Bhavna Kaveti yog tus kws sau ntawv tshawb fawb los ntawm Hyderabad, Is Nrias teb.Nws tuav MSc thiab MD los ntawm Vellore Institute of Technology, Is Nrias teb.nyob rau hauv cov organic thiab tshuaj chemistry los ntawm University of Guanajuato, Mexico.Nws txoj haujlwm tshawb fawb muaj feem xyuam nrog kev txhim kho thiab kev sib txuas ntawm bioactive molecules raws li heterocycles, thiab nws muaj kev paub dhau los hauv ntau theem thiab ntau cov khoom sib txuas.Thaum nws tus kws kho mob tshawb fawb, nws tau ua haujlwm ntawm kev sib txuas ntawm ntau yam heterocycle-raws li khi thiab fused peptidomimetic molecules uas xav tias yuav muaj peev xwm ua kom muaj kev ua haujlwm lom neeg ntxiv.Thaum sau cov ntawv pov thawj thiab cov ntaub ntawv tshawb fawb, nws tshawb nrhiav nws txoj kev mob siab rau kev sau ntawv thiab kev sib txuas lus.
Cavity, Buffner.(Lub Yim Hli 11, 2022).Puv npuag siab sensor tsim los rau kev saib xyuas kev noj qab haus huv.AZonano.Tau txais los ntawm https://www.azonano.com/news.aspx?newsID=39544 los ntawm Lub Kaum Hli 21, 2022.
Cavity, Buffner."Ib qho tag nrho cov ntaub so ntswg siab sensor tsim los rau kev saib xyuas kev noj qab haus huv uas hnav tau".AZonano.Lub Kaum Hli 21, 2022.Lub Kaum Hli 21, 2022.
Cavity, Buffner."Ib qho tag nrho cov ntaub so ntswg siab sensor tsim los rau kev saib xyuas kev noj qab haus huv uas hnav tau".AZonano.Tau qhov twg los: https://www.azonano.com/news.aspx?newsID=39544.(Lub Kaum Hli 21, 2022).
Cavity, Buffner.2022. Txhua daim ntaub siab sensor tsim los rau kev saib xyuas kev noj qab haus huv.AZoNano, nkag mus rau 21 Lub Kaum Hli 2022, https://www.azonano.com/news.aspx?newsID=39544.
Hauv kev xam phaj no, AZoNano tham nrog tus xibfwb André Nel txog kev tshawb fawb tshiab uas nws tau koom nrog hauv qhov uas piav qhia txog kev txhim kho "iav npuas" nanocarrier uas tuaj yeem pab cov tshuaj nkag mus rau hauv cov qog nqaij hlav qog nqaij hlav pancreatic.
Hauv kev xam phaj no, AZoNano tham nrog UC Berkeley's King Kong Lee txog nws qhov khoom plig Nobel-winning technology, optical tweezers.
Hauv kev xam phaj no, peb tham nrog SkyWater Technology txog lub xeev ntawm kev lag luam semiconductor, yuav ua li cas nanotechnology pab txhim kho kev lag luam, thiab lawv txoj kev koom tes tshiab.
Inoveno PE-550 yog qhov zoo tshaj plaws muag electrospinning / spraying tshuab rau kev tsim cov nanofiber nruam.
Filmetrics R54 Advanced sheet resistance mapping tool rau semiconductor thiab composite wafers.