Qhov sib txawv tseem ceeb ntawm graphene thiab carbon fiber yog tias graphene muaj tuab ntawm cov pa roj carbon atom txheej thaum carbon fiber muaj micrometer scale thickness.
Ob leeg graphene thiab carbon fiber yog cov khoom muaj carbon. Graphene tsuas muaj cov pa roj carbon atoms thaum carbon fiber feem ntau muaj cov pa roj carbon nrog rau lwm cov khoom xws li oxygen thiab nitrogen. Lwm qhov sib txawv tseem ceeb ntawm graphene thiab carbon fiber yog nyob rau hauv txoj kev uas cov nplooj ntawv carbon interlock hauv cov tshuaj no. Txawm li cas los xij, ob hom muaj cov pa roj carbon monoxide nyob rau hauv tib lub qauv hexagonal.
Graphene yog dab tsi?
Graphene yog ib qho allotrope ntawm cov pa roj carbon uas muaj ib txheej ntawm cov pa roj carbon atoms teem rau hauv cov qauv hexagonal. Yog li ntawd, nws yog ib qho semimetal uas muaj me me sib tshooj ntawm valence thiab conduction bands. Cov qauv ntawm graphene yog cov qauv yooj yim ntawm ntau cov pa roj carbon monoxide xws li graphite, pob zeb diamond, charcoal, carbon nanotubes, thiab lwm yam.
Ntxiv mus, muaj ntau yam tseem ceeb thiab tsis tshua muaj zog hauv graphene. Piv txwv li, nws yog cov khoom siv zog tshaj plaws uas peb tau sim. Tsis tas li ntawd, nws tuaj yeem ua cov cua sov thiab hluav taws xob hauv kev ua haujlwm siab. Cov khoom yog ze li pob tshab. Tsis tas li ntawd, nws qhia tau hais tias diamagnetism thiab nws kuj muaj ob-dimensional zog.
Daim duab 01: Graphene Sheet
Txhua cov pa roj carbon atom hauv daim ntawv graphene muaj plaub daim ntawv cog lus nyob ib puag ncig nws xws li peb daim ntawv cog lus nrog peb lwm cov pa roj carbon atom hauv tib lub dav hlau thiab ib daim ntawv cog lus pi perpendicular rau lub dav hlau. Qhov kev ncua deb ntawm ob lub carbon atoms nyob rau hauv cov qauv no yog hais txog 1.42 Å. Yog li ntawd, cov pa roj carbon atoms nruj nreem kaw thiab sp2 hybridization ntawm txhua cov pa roj carbon atom muab graphene nws ruaj khov. Yog li, yog tias peb nthuav tawm cov nplooj ntawv no rau lwm cov khoom siv carbon xws li hydrocarbon, lawv tuaj yeem kho qhov kev puas tsuaj hauv cov nplooj ntawv lawv tus kheej.
Daim ntawv thov ntawm graphene yog nyob rau hauv cov tshuaj (cov ntaub so ntswg engineering, bioimaging, tshuaj xa, kuaj, toxicity), hauv electronics (tsim ntawm transistors, pob tshab conducting electrodes, optoelectronics, thiab lwm yam), nyob rau hauv lub teeb ua (optical) modulators, UV lens), thiab lwm yam.
Carbon Fiber yog dab tsi?
Carbon fiber yog ib daim ntawv ntawm fiber ntau uas muaj feem ntau carbon atoms teem nyob rau hauv ib tug hexagonal qauv. Cov fibers no muaj li 5-10 micrometer hauv txoj kab uas hla. Qhov tseem ceeb tshaj, cov khoom no muaj nyob rau hauv daim ntawv ntawm ib tug nruam rub lub qhov txhab mus rau ib tug reel. Thiab, tus cab no muaj ib pob ntawm ntau txhiab tus neeg carbon filaments nyob rau hauv tas li ntawd. Tsis tas li ntawd, lub pob no yog tiv thaiv nrog cov organic txheej. Yog li ntawd, peb tuaj yeem tso lub laub rau daim ntawv thov npaj.
Cov qauv atomic ntawm cov khoom no zoo ib yam li cov graphene; hexagonal qauv. Ntxiv mus, muaj ob hom ntawm carbon fiber raws li precursor uas peb siv los ua cov khoom no; turbostratic los yog graphitic. Qee zaum, nws yog ib qho kev sib xyaw ntawm ob qho tib si.
Daim duab 02: Npuag ua los ntawm Woven Carbon Filaments
Cov khoom tseem ceeb tshaj plaws ntawm cov khoom siv no suav nrog kev ua haujlwm siab, siab tensile lub zog, qhov hnyav, tsis muaj tshuaj lom neeg, siab kub siab ntev thiab qis thermal expansion. Vim cov khoom no, carbon fiber yog nrov hauv kev siv aerospace, tub rog, thiab lwm yam.
Qhov txawv ntawm Graphene thiab Carbon Fiber yog dab tsi?
Graphene yog ib qho allotrope ntawm carbon uas muaj ib txheej ntawm carbon atoms teem nyob rau hauv ib tug tsis tu ncua hexagonal qauv thaum carbon fiber yog ib daim ntawv ntawm fiber uas muaj feem ntau carbon atoms teem nyob rau hauv ib tug hexagonal qauv. Cov no yog cov khoom siv feem ntau ntawm cov pa roj carbon atoms. Txawm li cas los xij, lawv txawv ntawm ib leeg raws li qhov tuab. Yog li, qhov sib txawv tseem ceeb ntawm graphene thiab carbon fiber yog tias graphene muaj cov tuab ntawm cov pa roj carbon atom txheej thaum carbon fiber muaj micrometer scale thickness. Lwm qhov sib txawv tseem ceeb ntawm graphene thiab carbon fiber yog cov nplooj ntawv graphene ntim kom nruj whereas carbon fiber tsis muaj cov ntawv ntim nruj.
Cov lus qhia hauv qab no ntawm qhov sib txawv ntawm graphene thiab carbon fiber qhia ntau qhov sib txawv ntawm ob qho tib si.
Summary – Graphene vs Carbon Fiber
Graphene thiab carbon fiber yog cov khoom tseem ceeb ntawm cov pa roj carbon. Qhov sib txawv tseem ceeb ntawm graphene thiab carbon fiber yog tias graphene muaj cov tuab ntawm cov pa roj carbon atom txheej thaum carbon fiber muaj micrometer scale thickness.
