Kev txhim kho ntawm Aramid Fiber
Aramid fiber ntau yog ib qho tseem ceeb tshaj plaws engineering cov ntaub ntawv ntawm peb lub sijhawm. Nws tau txais lub koob npe nrov ua ib qho ntawm cov muaj zog tshaj thiab ruaj khov fibers ntawm kev ua lag luam. Nws yog lub luag haujlwm rau txuag suav tsis txheeb lub neej thiab tiv thaiv kev puas tsuaj loj rau vaj tse. Tau ntau xyoo, aramid fiber ntau tau dhau los ua ib qho tseem ceeb hauv kev tsim cov khoom siv kev nyab xeeb, khoom siv tub rog, thiab ntau lwm yam kev siv hauv kev lag luam. Kab lus no yuav muab cov ntsiab lus luv luv ntawm keeb kwm ntawm aramid fiber ntau thiab nws tau hloov zuj zus mus rau hauv cov khoom nrov uas nws niaj hnub no.
Keeb kwm ntawm Aramid Fiber
Xyoo 1961, ib pawg kws tshawb fawb ntawm DuPont tau tsim cov fiber ntau hu ua Nomex, uas tom qab ntawd ua raws Kevlar, lwm hom aramid fiber ntau. DuPont chemist Stephanie Kwolek tau txais txiaj ntsig los ntawm pab pawg R & D uas tsim Nomex. Ob leeg Nomex thiab Kevlar raug cais raws li aramid fibers, uas txhais tau hais tias lawv yog hluavtaws polymers ua los ntawm cov saw ntev molecules. Aramid fibers yog tsim los ntawm cov hlua khi polymer uas tau ntim nruj ua ke. Qhov kev npaj no muab cov fibers lawv lub zog siab thiab nruj.
Lub npe "aramid" tau muab los ntawm ob lo lus: "aromatic" thiab "polyamide." Raws li hom polymer, ib qho aramid molecule muaj cov pab pawg muaj ntxhiab. Qhov no yog qhov sib piv rau polyethylene, uas yog cov yas uas muaj nyob hauv cov khoom siv niaj hnub xws li cov hnab ntim khoom noj thiab cov dej qab zib fwj. Aramids kuj muaj cov pab pawg amide, uas paub txog kev muab kev nruj ntxiv thiab lub zog. Cov qauv tshuaj uas muaj ob pawg no hu ua "arromatic polyamides." Qhov no yog qhov teeb tsa aramid fibers sib nrug los ntawm lwm hom polymers.
Thaum aramid fibers tau tsim thawj zaug hauv xyoo 1960, lawv tau tsim los siv rau hauv kev ua tub rog thiab kev siv dav hlau. Qhov no yog vim lawv lub zog tshwj xeeb, lub teeb yuag, thiab nplaim hluav taws-retardant zog. Lub sijhawm dhau los, txawm li cas los xij, aramid fibers tau pom lawv txoj hauv kev rau ntau yam kev lag luam thiab kev siv, suav nrog tsheb, kev tsim kho, thiab txawm tias cov khoom siv kis las. Txoj kev loj hlob ntawm aramid fiber ntau yog qhov tseem ceeb hauv kev tsim cov khoom muaj kev nyab xeeb uas tuaj yeem tiv taus ntau yam kev mob hnyav.
Hom ntawm Aramid Fiber
Raws li tau hais, Kevlar thiab Nomex yog ob hom nrov ntawm aramid fibers tsim los ntawm DuPont. Kevlar yog qhov paub zoo rau nws siv hauv cov tsho tiv thaiv mos txwv, thaum Nomex feem ntau siv rau hauv cov khaub ncaws tiv thaiv nplaim taws rau cov neeg tua hluav taws. Ob lub fibers muaj cov khoom tshwj xeeb uas ua rau lawv zoo tagnrho rau ntau yam kev siv. Lwm hom aramid fibers suav nrog Technora thiab Twaron.
Technora, uas yog tsim los ntawm Teijin, yog qhov ua tau zoo aramid uas tau sau tseg rau nws qhov tshwj xeeb kub tsis kam thiab tshuaj lom neeg ruaj khov. Nws yog feem ntau siv rau hauv kev lag luam siv xws li cov khoom siv lim dej thiab cov khoom siv tshuaj lom neeg. Twaron, tsim los ntawm Teijin Aramid, yog ib hom aramid fiber ntau uas zoo ib yam li Kevlar hais txog lub zog thiab nruj. Txawm li cas los xij, nws muaj ntau dua modulus, uas txhais tau hais tias nws tiv taus ntau dua rau deformation hauv kev ntxhov siab. Nws yog feem ntau siv rau hauv cov khoom uas yuav tsum tau zoo heev nro tsis kam, xws li lub log thiab cov hlua.
Cov khoom thiab qhov zoo ntawm Aramid Fiber
Ib qho ntawm cov txiaj ntsig tseem ceeb ntawm aramid fiber ntau yog nws qhov zoo tshaj plaws lub zog-rau-qhov hnyav piv. Thaum piv rau lwm cov fibers xws li hlau thiab txhuas, aramid fibers yog ntau sib dua, ua rau lawv zoo tagnrho rau cov ntawv thov uas yuav tsum tau muaj zog thiab tsis muaj zog. Tsis tas li ntawd, aramid fibers muaj kev tiv thaiv zoo heev rau cua sov thiab hluav taws. Lawv feem ntau siv rau hauv cov ntawv thov uas xav tau cov khoom siv hluav taws xob tsis zoo, xws li cov foob pob hluav taws thiab cov sib tw sib tw.
Lwm cov cuab yeej tseem ceeb ntawm aramid fibers yog lawv cov kev tiv thaiv siab rau kev puas tsuaj thiab cuam tshuam. Qhov no ua rau lawv mus rau kev xaiv los tiv thaiv ntau yam khoom siv uas yuav tsum tau ua haujlwm hnyav. Ntxiv mus, aramid fibers muaj qhov qis qis, uas txhais tau hais tias lawv khaws lawv cov duab thiab qhov loj me txawm tias raug kub siab.
Aramid fibers kuj tseem muaj zog tiv thaiv ntau yam tshuaj, ua rau lawv tsim nyog siv rau hauv ntau daim ntawv thov kev lag luam. Lawv kuj tiv taus UV teeb, uas txhais tau hais tias lawv tuav lawv lub zog thiab zoo li los ntawm ntau xyoo raug tshav ntuj.
Kev siv ntawm Aramid Fiber
Muaj ntau cov ntawv thov rau aramid fiber ntau hauv kev lag luam ntau. Kev siv ntau tshaj plaws ntawm aramid fiber ntau yog nyob rau hauv lub tsho tiv thaiv mos txwv thiab lwm yam khoom siv tiv thaiv tus kheej. Tub ceev xwm, tub rog tub rog, thiab cov neeg ua haujlwm ruaj ntseg tau tuaj yeem tso siab rau lub zog thiab ua haujlwm ntev ntawm aramid fibers los tiv thaiv lawv hauv cov xwm txheej uas muaj kev pheej hmoo siab. Aramid fibers kuj tseem siv rau hauv cov khaub ncaws tiv thaiv hluav taws, cov khoom siv hluav taws xob, thiab cov khoom siv lim dej. Tsis tas li ntawd, kev lag luam tsheb siv aramid fibers ua cov khoom siv ntxiv hauv cov log tsheb, lub sijhawm siv sijhawm, thiab cov pawm nres.
Lwm daim ntawv thov nrov ntawm aramid fiber yog nyob rau hauv cov khoom ua si. Nws tau txais koob meej hauv kev tsim cov dav hlau thiab kev sib tw khoom siv tes ua, suav nrog tsheb thiab nkoj. Aramid fiber ntau yog cov khoom siv ruaj khov uas tuaj yeem tiv taus kev ntxhov siab, ua rau nws muaj kev xaiv nrov rau kev tsim cov snowboards, skis, thiab tsheb kauj vab.
Yav tom ntej ntawm Aramid Fiber
Nyob rau hauv lub neej yav tom ntej, peb tuaj yeem cia siab tias yuav pom ntau yam kev siv thiab cov khoom tsim los ntawm aramid fiber ntau. Kev tshawb fawb tam sim no tab tom tsim los tsim hom tshiab ntawm aramid fibers uas muaj zog ntau dua thiab ua haujlwm ntev. Tsis tas li ntawd, cov kev hloov pauv tshiab ntawm aramid fibers tuaj yeem muab kev yooj yim dua thiab kev ua haujlwm zoo, tso cai rau lawv siv rau hauv cov khoom uas xav tau kev ua haujlwm siab rau khoov thiab sib tw.
Muab qhov kev thov rau kev nyab xeeb thiab kev tiv thaiv nyob rau hauv ntau yam kev lag luam thiab kev siv, aramid fibers yuav nyob twj ywm ib qho tseem ceeb tivthaiv. Nrog rau kev tsim kho tshiab thiab kev tsim cov ntaub ntawv tshiab, peb tuaj yeem cia siab tias yuav pom aramid fibers txuas ntxiv mus ntxiv thiab dhau los ua qhov tseem ceeb hauv xyoo tom ntej.
Xaus
Txoj kev loj hlob ntawm aramid fiber ntau yog ib qho kev nce qib tseem ceeb hauv engineering thiab kev tsim khoom. Nws lub zog tshwj xeeb, ua haujlwm ntev, thiab nplaim taws ua rau nws yog ib qho khoom siv tseem ceeb hauv ntau qhov kev lag luam, suav nrog cov tub rog, tsheb, cov khoom ua si, thiab cov khoom siv. Raws li kev siv thev naus laus zis txuas ntxiv mus, peb tuaj yeem cia siab tias aramid fibers yuav dhau los ua qhov muaj zog thiab ntau yam, ua kom tib neeg thiab cov cuab yeej muaj kev nyab xeeb thiab txhim khu kev qha.
