Qhov twg yog Fireproof dua? Carbon Fiber VS. Aramid

Taw qhia

 

Thaum nws los txog rau kev ua haujlwm ntawm cov ntaub ntawv engineering, muaj ob yam ntaub ntawv uas tau tshawb fawb txog lawv lub zog thiab kev ua haujlwm zoo; carbon fiber thiab aramid. Ob cov ntaub ntawv no tau siv dav hauv ntau lub spheres, paub qhov txawv ntawm lawv tus kheej los ntawm lawv lub zog, durability, thiab tsis kam rau kev hnav thiab tsim kua muag. Nyob rau lub sijhawm tsis ntev los no, tau muaj kev txaus siab rau kev nkag siab txog qhov ua tau zoo ntawm cov khoom siv hluav taws xob thiab seb lawv siv li cas thaum muab los ntawm kev sim nruj. Txawm hais tias ob qho tib si cov ntaub ntawv tau pom tias muaj kev tiv thaiv hluav taws kub heev, tsab xov xwm no nrhiav kev tshuaj xyuas qhov sib txawv ntawm ob qho tib si txog lawv cov khoom tiv thaiv hluav taws thiab kev ua haujlwm ntawm carbon fiber thiab aramid nyob rau hauv ntau lub sijhawm.

 

Cov pa roj carbon fiber

 

Cov pa roj carbon fiber, tseem hu ua graphite fiber, yog cov khoom siv nrov siv dav hauv kev lag luam aerospace, cov khoom siv ua kis las, tsheb, thiab kev siv kho mob, ntawm ntau yam kev lag luam vim nws qhov tshwj xeeb ruaj khov thiab lub zog (Wang, Gao, & Cheng, 2016) . Carbon fibers yog tsim los ntawm polymerizing acrylonitrile nyob rau hauv cov nroj tsuag uas nws yog electrospun thiab twisted rau hauv microfilaments, uas ces undergo carbonization. Cov txheej txheem no suav nrog kev xa cov filaments mus rau qhov kub siab txog li 2,400 degree, ua rau kev tsim cov pa roj carbon monoxide ntshiab hauv cov qauv siv lead ua lattice. Qhov tshwm sim yog cov khoom siv uas muaj zog tensile siab, tsis tshua muaj thermal expansion, thiab siab tiv thaiv corrosion (Wang, Gao, & Cheng, 2016).

 

Sib nrug los ntawm nws cov cuab yeej tshwj xeeb, cov pa roj carbon fiber tau paub txog nws lub peev xwm los tiv thaiv qhov kub thiab txias. Nws suav hais tias ruaj khov mus txog 400 degree hauv huab cua thiab tuaj yeem tiv taus mus txog 1,000 degree hauv lub tshuab nqus tsev yam tsis muaj kev qhia txog kev puas tsuaj (Abdallah li al., 2018). Txawm li cas los xij, ib zaug raug hluav taws xob ncaj qha, carbon fibers tawg, feem ntau ua rau melting lossis ignition. Qhov no yog vim hais tias ntawm qhov kub siab tshaj 400 degree, cov pa roj carbon atoms nyob rau hauv carbon fibers react nrog atmospheric oxygen los tsim carbon monoxide thiab dioxide, uas ua rau combustion ntawm cov khoom.

 

Aramid

 

Aramid fibers lossis aramids yog cov khoom siv hluav taws xob ua haujlwm siab siv dav hauv ntau daim ntawv thov uas xav tau lub zog siab, ua haujlwm ntev, thiab ua haujlwm rau cov khoom sab nraud. Hom aramid feem ntau yog poly-p-phenylene terephthalamide, paub zoo dua li Kevlar, tau qhia hauv 1971 los ntawm DuPont. aramid fibers yog tsim los ntawm polymerizing molecules siv ob-kauj ruam cov tshuaj tiv thaiv uas suav nrog ua ntej tsim cov kua crystalline polymer los ntawm solubilizing thiab spinning rau hauv fiber ntau tom qab. Cov fibers tiav lawm yog qhov txawv ntawm lawv lub zog tensile siab, qis elongation ntawm kev tawg, thiab tsis kam mus rau puas thiab cuam tshuam (Zhou li al., 2018). Cov fibers paub txog lawv qhov tshwj xeeb thermal stability thiab tuaj yeem tiv taus kub txog li 300 degree yam tsis muaj kev puas tsuaj.

 

Tsis zoo li cov pa roj carbon fiber ntau, aramid fiber ntau kuj yog cov nplaim hluav taws kub hnyiab, yog ib yam ntxwv uas tso nws ua ntej ntawm lwm cov ntaub ntawv hais txog hluav taws kub. Thaum aramid fibers tuaj rau hauv kev sib cuag nrog lub tshav kub, lawv tau txais cov txheej txheem hu ua endothermic degradation, uas ua rau cov fibers decompose yam tsis tso tawm cov roj hluav taws xob (Zhou li al., 2018). Vim tias tsis muaj cov pa roj carbon monoxide, tus nqi ntawm cov cua sov hloov mus rau lub substrate thaum aramid fibers muaj hluav taws kub tsawg, uas ua rau txo kev siv thiab txo qis kev puas tsuaj.

 

Kev sib piv: Carbon Fiber thiab Aramid hauv Hluav Taws Kub Kub

 

Txawm hais tias carbon fiber thiab aramid fiber yog ob leeg paub txog lawv lub zog, durability, thiab tsis kam mus rau lwm yam, lawv txawv thaum nws los txog rau hluav taws kub. Cov pa roj carbon fiber ntau yooj yim rau melting los yog ignition thaum raug hluav taws kub, thaum aramid fiber tolerates tshav kub thiab nplaim taws, ua rau nws yog ib tug zoo tagnrho cov ntaub ntawv rau cov ntaub ntawv uas muaj kub raug (Jeong, Lee, & Kim, 2018). Tsis tas li ntawd, aramid fiber ntau nthuav tawm cov khoom tshwj xeeb txawm tias nyob rau hauv qhov hnyav tshaj plaws ntawm qhov chaw sov, ua rau nws nyiam cov khoom siv hauv kev tsim cov iav tiv thaiv hauv kev ua tub rog, kev lag luam, thiab kev tua hluav taws.

 

Hauv kev ntsuam xyuas qhov kev ua tau zoo ntawm cov khoom siv hluav taws xob, cov kev tshawb fawb qhia tau hais tias aramid fibers fare zoo dua carbon fibers nyob rau hauv cov xwm txheej uas xav tau kev tiv thaiv hluav taws. Hauv kev tshawb fawb los ntawm Li thiab cov neeg ua haujlwm ua haujlwm (2019), cov kws tshawb fawb tau txais cov pa roj carbon thiab aramid fibers rau ntau theem ntawm cov cua sov los txiav txim siab qhov cuam tshuam ntawm tshav kub ntawm cov ntaub ntawv. Txoj kev tshawb nrhiav pom tias thaum aramid fibers tsis muaj kev hloov pauv tseem ceeb thaum raug kub txog li 600 degree, carbon fibers nthuav tawm qhov tseem ceeb ntawm qhov tawg, tawg, thiab nthuav dav. Ib yam li ntawd, hauv lwm txoj kev tshawb fawb, Jeong thiab cov neeg ua haujlwm ua haujlwm (2018) tau tshawb xyuas cov khoom hluav taws kub-resistant ntawm ob cov ntaub ntawv nrog carbon fiber piv rau aramid fiber ntau. Cov kws tshawb fawb tau pom tias cov aramid fiber ntau muaj cov nplaim hluav taws zoo dua piv rau carbon fiber ntau.

 

Tsis tas li ntawd, aramid fibers yog qhov tshiab ntawm kev tsim cov ntawv thov ntau dua li carbon fiber. Txij li thaum aramid fibers yog inherently nplaim-retardant, cov khoom yog heev nrhiav tom qab nyob rau hauv lub textile kev lag luam rau ntau yam kev siv, xws li hluav taws kub iav, industrial tiv thaiv tus kheej (PPE), khaub ncaws sab nraum zoov, thiab tsev pheebsuab, thiab lwm yam. Cov pa roj carbon fibers tsis yog nplaim taws-tiv taus, thiab txhua daim ntawv thov yuav tsum tau hluav taws kub, xws li cov khoom siv cav, yuav tsum tau ntxiv cov matrices kom ua tiav cov nplaim taws.

 

Xaus

 

Zuag qhia tag nrho, ob qho tib si carbon fiber thiab aramid fiber ntau yog cov khoom tshwj xeeb uas muaj npe nrov rau lawv lub zog, kav ntev, thiab cov yam ntxwv ua tau zoo. Thaum cov pa roj carbon fiber ntau tau qhuas rau nws cov khoom siv tshwj xeeb, nws cov khoom siv hluav taws xob tsis zoo nyob rau tib theem nrog qhov aramid fiber ntau muaj. Aramid fiber ntau paub txog nws qhov tshwj xeeb thermal stability, nplaim taws retardance, thiab zoo heev txhua yam khoom uas ua rau nws zoo tagnrho rau siv nyob rau hauv hnyav kub ib puag ncig. Yog li ntawd, nyob rau hauv daim ntawv thov uas xav tau kev ua tau zoo nyob rau hauv ib puag ncig kub kub, aramid fiber yog qhov kev xaiv ntau dua.

 

Cov ntaub ntawv

 

Abdallah, S., Barakat, M., Abdel-Ghaffar, M., El-Khashab, F., Salah, NE, & El-Sayed, A. (2018). Carbon nanofibers composite: Fabrication thiab kev siv nyob rau hauv lub teb ntawm lub zog thiab ib puag ncig. Phau ntawv Journal of Industrial and Engineering Chemistry, 58, 1-14.

 

Jeong, GY, Lee, DH, Koo, JH, Kim, SS, & Kim, JG (2018). Kev cuam tshuam thiab hluav taws kub ntawm aramid- thiab carbon fiber-reinforced composite daim hlau. Phau ntawv Journal of Composite Materials, 52(30), 4167-4176.

 

Li, Y., Xu, S., Zhang, Y., & Zhang, J. (2019). Kev soj ntsuam ntawm qhov kub-kub txhua yam khoom ntawm carbon thiab aramid fibers. Cov ntaub ntawv niaj hnub no: Kev Ua Haujlwm, 9(12), 454-459.

 

Wang, K., Gao, X., & Cheng, H. M. (2016). Mechanical zog ntawm carbon nanotubes reinforced composites solidified los ntawm yaj. Cov pa roj carbon, 100, 551-562.

 

Zhou, L., Cuan, X., Sun, H., & Lin, X. (2018). Cov nyhuv ntawm aramid fibers ntawm cov khoom ntawm LLDPE-raws li cov cua sov shrinkable films. Phau ntawv Journal of Adhesion Science thiab Technology, 32(16), 1700-1709.