Cov pa roj carbon nanotubesyog tej yam zoo kawg.Lawv tuaj yeem muaj zog dua li cov hlau thaum ua nyias dua li tib neeg cov plaub hau.

Lawv kuj muaj kev ruaj khov, hnav, thiab muaj cov khoom siv hluav taws xob zoo kawg, thermal thiab mechanical zog.Vim li no, lawv tuav lub peev xwm rau kev txhim kho ntawm ntau cov ntaub ntawv nthuav dav yav tom ntej.

Lawv kuj tseem yuav tuav tus yuam sij rau kev tsim cov ntaub ntawv thiab cov qauv ntawm lub neej yav tom ntej, xws li chaw elevator.

Ntawm no, peb tshawb nrhiav lawv yog dab tsi, lawv ua li cas thiab cov ntawv thov twg lawv nyiam muaj.Qhov no tsis yog txhais tau tias yog phau ntawv qhia tag nrho thiab tsuas yog npaj los siv los ua kev saib xyuas sai.

Dab tsi yogcarbon nanotubesthiab lawv cov khoom?

Carbon nanotubes (CNTs luv luv), raws li lub npe qhia, yog feeb cylindrical qauv tsim los ntawm carbon.Tab sis tsis yog cov pa roj carbon monoxide xwb, CNT muaj cov ntawv dov-up ntawm ib txheej ntawm carbon molecules hu ua graphene.

Lawv zoo li tuaj nyob rau hauv ob lub ntsiab lus:

1. Ib leeg-walled carbon nanotubes(SWCNTs) - Cov no zoo li muaj txoj kab uas hla tsawg dua 1 nm.

2. Multiwalled carbon nanotubes(MWCNTs) - Cov no muaj ob peb concentrically-interlinked nanotubes thiab zoo li muaj txoj kab uas hla tuaj yeem ncav cuag ntau tshaj 100 nm.

Nyob rau hauv ob qho tib si, CNTs tuaj yeem muaj qhov sib txawv ntawm qhov ntev ntawm ob peb micrometers mus rau centimeters.

Raws li cov hlab tsuas yog tsim los ntawm graphene, lawv qhia ntau yam ntawm nws cov khoom nthuav.CNTs, piv txwv li, yog sib koom nrog sp2 daim ntawv cog lus - cov no muaj zog heev ntawm qib molecular.

Cov pa roj carbon nanotubes kuj muaj qhov nyiam hlua ua ke ntawm van der Waals rog.Qhov no muab lawv lub zog siab thiab qhov hnyav tsawg.Lawv kuj zoo li yog cov khoom siv hluav taws xob-conductive thiab thermally-conductive.

"Cov phab ntsa CNT tus kheej tuaj yeem yog xim hlau lossis semiconducting nyob ntawm qhov taw qhia ntawm lub lattice nrog rau lub raj axis, uas yog hu ua chirality."

Cov pa roj carbon nanotubes kuj muaj lwm yam zoo thermal thiab mechanical zog uas ua rau lawv txaus nyiam rau kev tsim cov ntaub ntawv tshiab.

carbon nanotubes ua dab tsi?

Raws li peb tau pom lawm, carbon nanotubes muaj qee qhov txawv txav.Vim li no, CNTs muaj ntau yam nthuav thiab ntau yam kev siv.

Qhov tseeb, raws li xyoo 2013, raws li Wikipedia ntawm Science Direct, carbon nanotube ntau lawm ntau tshaj li ob peb txhiab tons hauv ib xyoos.Cov nanotubes no muaj ntau daim ntawv thov, suav nrog kev siv hauv:

• Lub zog cia daws teeb meem
• Cov khoom siv ua qauv
• Cov qauv sib xyaw
• Automotive qhov chaw, nrog rau muaj peev xwm nyob rau hauv hydrogen roj cell tsheb
• Nkoj hull
• Cov khoom siv ncaws pob
• Cov lim dej
• Nyias-film electronics
• Txheej
• Cov actuators
• Electromagnetic shielding
• Textiles
• Kev siv biomedical, suav nrog cov ntaub so ntswg engineering ntawm cov pob txha thiab cov leeg, tshuaj xa mus, biosensors thiab lwm yam

Dab tsi yogmultiwalled carbon nanotubes?

Raws li peb twb pom lawm, multiwalled carbon nanotubes yog cov nanotubes ua los ntawm ob peb concentrically interlinked nanotubes.Lawv zoo li muaj txoj kab uas hla tuaj yeem ncav cuag ntau tshaj 100 nm.

Lawv tuaj yeem ncav cuag qhov ntev ntawm centimeters hauv qhov ntev thiab zoo li muaj qhov sib piv uas txawv ntawm 10 thiab 10 lab.

Multi-walled nanotubes tuaj yeem muaj nyob nruab nrab ntawm 6 thiab 25 lossis ntau dua concentric phab ntsa.

MWCNTs muaj qee yam khoom zoo heev uas tuaj yeem siv tau hauv ntau daim ntawv thov kev lag luam.Cov no suav nrog:

• Hluav taws xob: MWNTs yog cov khoom siv hluav taws xob zoo thaum sib xyaw ua ke hauv cov qauv sib xyaw.Nws yuav tsum raug sau tseg tias sab nrauv phab ntsa ib leeg yog ua, cov phab ntsa sab hauv tsis yog qhov tseem ceeb rau kev coj ua.
• Morphology: MWNTs muaj qhov sib piv siab, nrog qhov ntev feem ntau ntau dua 100 npaug ntawm txoj kab uas hla, thiab qee qhov ntau dua.Lawv cov kev ua tau zoo thiab daim ntawv thov tsis yog nyob ntawm qhov sib piv, tab sis kuj nyob ntawm qib ntawm entanglement thiab qhov ncaj ntawm cov hlab, uas nyob rau hauv lem yog ib qho kev ua haujlwm ntawm ob qho tib si degree thiab qhov ntev ntawm qhov tsis xws luag hauv cov hlab.
• Lub cev: Tsis muaj qhov tsis xws luag, tus kheej, MWNTs muaj lub zog tensile zoo heev thiab thaum sib xyaw ua ke, xws li cov khoom siv thermoplastic lossis thermoset, tuaj yeem ua rau nws lub zog loj.