Raws li tsab ntawv tshaj tawm tshiab, cov khoom siv sib xyaw ua ke tom ntej tuaj yeem saib xyuas lawv tus kheej cov txheej txheem kev noj qab haus huv, thiab dhau los ua ntau yam.
Cov pa roj carbon fiber ntau yog lub teeb thiab ruaj khov thiab yog cov khoom siv tseem ceeb rau tsheb, dav hlau thiab lwm yam kev thauj mus los. Lawv muaj cov polymer substrates, xws li epoxy resins, uas yog embedded nrog reinforced carbon fibers. Vim muaj qhov sib txawv ntawm cov khoom sib txawv ntawm ob cov ntaub ntawv, cov fibers yuav poob tawm ntawm lub substrate nyob rau hauv kev ntxhov siab ntau dhau los yog qaug zog. Qhov no txhais tau hais tias kev puas tsuaj rau cov qauv carbon fiber ntau tseem tuaj yeem muab zais hauv qab ntawm qhov chaw thiab tsis tuaj yeem pom los ntawm qhov muag liab qab, uas tuaj yeem ua rau muaj kev puas tsuaj loj.
"Los ntawm kev nkag siab txog sab hauv ntawm cov khoom sib xyaw, koj tuaj yeem txiav txim siab lawv txoj kev noj qab haus huv zoo dua thiab paub tias puas muaj kev puas tsuaj uas yuav tsum tau kho," Ridge Chris Bowland, tus kws tshawb fawb ntawm
Oak Ridge National Laboratory ntawm US Department of Energy (Oak National Laboratory) Wigner. "Tsis ntev los no, Amit Naskar, tus thawj coj ntawm pab pawg carbon thiab composites ntawm Bowland thiab ORNL, tau tsim ib txoj kev dov stripe los qhwv cov pa roj carbon fibers ntawm semiconductor silicon carbide nanoparticles. Cov nanomaterials yog embedded nyob rau hauv cov ntaub ntawv uas muaj zog dua lwm cov fiber-reinforced composites lawv tus kheej muaj peev xwm thiab kev noj qab haus huv. fibers yog embedded nyob rau hauv lub polymer, cov fibers tsim ib lub hwj chim daim phiaj, thiab bulk composites ua hluav taws xob semiconductor nanoparticles yuav rhuav tshem cov hluav taws xob conductivity nyob rau hauv qhov kev txiav txim ntawm sab nraud quab yuam, ntxiv txhua yam thiab hluav taws xob ua hauj lwm rau cov composites yog stretched, cov kev sib txuas ntawm cov coated fibers yuav raug puas ntsoog thiab cov ntaub ntawv nyob rau hauv lub wings khoov, lub teeb liab hluav taws xob yuav ceeb toom rau lub dav hlau lub computer kom pom tias lub tis nyob rau hauv lub siab dhau heev lawm thiab qhia ib qho kev ntsuam xyuas lub dov sawb ntawm ORNL proves nyob rau hauv lub hauv paus ntsiab lus hais tias cov txheej txheem yuav ua tau cov tiam tom ntej ntawm composite coated fibers nyob rau hauv ib tug loj scale.Self-sensing composites, tej zaum ua los ntawm renewable polymer substrates lawv cov khoom siv fiber ntau, nrog rau cov khoom siv hluav taws xob tsawg. 3D luam tawm lub tsheb thiab cov tsev nyob rau hauv thiaj li yuav ua rau fibers embedded nyob rau hauv nanoparticles, cov kws tshawb fawb tau nruab high-performance carbon fiber spools ntawm cov chais, thiab cov rollers soaked fibers nyob rau hauv epoxy resins, uas muaj nanoparticles nyob rau hauv lub lag luam, qhov dav ntawm uas yog hais txog qhov dav ntawm tus kab mob (45-65 nm).
Tom qab ntawd cov fibers tau qhuav hauv qhov cub kom ruaj ntseg txheej. Txhawm rau kuaj lub zog ntawm cov fibers embedded nyob rau hauv nanoparticles glued mus rau lub polymer substrate, cov kws tshawb fawb tau ua fiber ntau reinforced composite beams, uas tau teem nyob rau hauv One Direction.The Bowland tau ua ib qho kev ntsuam xyuas kev ntxhov siab uas qhov kawg ntawm cantilever tau kho, thaum lub tshuab ntsuam xyuas cov khoom siv kho tshuab siv thrust nyob rau hauv nruab nrab ntawm beam beam. Txhawm rau kawm txog kev paub lub peev xwm ntawm cov khoom siv sib xyaw, nws tau teeb tsa electrodes ntawm ob sab ntawm cantilever beam. Nyob rau hauv lub tshuab hu ua "Dynamic mechanical analyzer," nws clipped ib kawg kom lub cantilever nyob ruaj ruaj. Lub tshuab siv lub zog ntawm lwm qhov kawg kom khoov lub nqaj ncua kev kawm thaum Bowland saib xyuas qhov kev hloov ntawm kev tiv thaiv. ORNL, tus kws tshawb fawb tom qab kws kho mob Ngoc Nguyen, tau ua qhov kev ntsuam xyuas ntxiv hauv Fourier Transform Infrared spectrometer los kawm txog cov khoom siv tshuaj lom neeg hauv cov khoom sib xyaw thiab txhim kho kev nkag siab ntawm kev txhim kho cov cuab yeej siv zog pom. Cov kws tshawb fawb kuj tau sim lub peev xwm ntawm lub zog dissipative ntawm cov khoom sib xyaw ua los ntawm ntau qhov sib txawv ntawm nanoparticles ( ntsuas los ntawm kev vibration damping tus cwj pwm), uas yuav pab txhawb cov lus teb ntawm cov khoom siv rau kev poob siab, kev vibrations thiab lwm yam kev ntxhov siab thiab strain. Ntawm txhua qhov concentration, nanoparticles tuaj yeem txhim kho lub zog dissipation (ntawm 65% txog 257% mus rau qhov sib txawv). Bowland thiab Naskar tau thov rau cov txheej txheem patent rau kev tsim khoom ntawm tus kheej-sensing carbon fiber composites.
"Impregnated coatings muab txoj hauv kev tshiab los coj kom zoo dua ntawm cov khoom siv nano tshiab uas tab tom tsim." Bowland hais. Txoj kev tshawb no tau txais kev txhawb nqa los ntawm kev tshawb fawb thiab kev tsim kho cov haujlwm qhia los ntawm ORNL Laboratory, luam tawm hauv phau ntawv xov xwm ACS Applied Materials and Interfaces (Applied Materials & Interfaces) ntawm American Chemical Society.
Post lub sij hawm: Dec-07-2018