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Graphene Tshwj Xeeb Qauv

Graphene yog ob hom khoom me me ntawm cov kua roj carbon monoxide, uas muaj cov pa roj carbon monoxide hauv kev ua kom zoo. Cov pa carbon thiab carbon atoms los ntawm kev ua ke ntawm sp2 hybrid, nws cov qauv yog ruaj khov. Qhov tshwj xeeb qauv ntawm graphene ua rau nws ntau yam khoom zoo heev.

Graphene yog tam sim no muaj nyob hauv qhov nyuaj ntawm cov khoom siv loj, thiab muaj cov khoom vaj khoom tsev zoo, qhov theoretical deg cheeb tsam txog 2600m2 / g, nrog koj thermal conductivity, mus txog 3000W / (m · K). Tsis tas li, graphene kuj muaj kev sib txuas lus zoo. Thaum sov sov, nws qhov hluav taws xob muaj peev xwm ua tau li 20000cm2 / (V · s).

Vim cov khoom zoo ntawm graphene, cov neeg tshawb xyuas xav muab nws ua qhov cuab lub zog rau matrix khoom los txhim kho kev ua tiav ntawm cov khoom siv hauv matrix.

Txawm li cas los xij, qhov chaw ntawm qhov graphene tshwj xeeb yuav tsum tau agglomerated ua ke, uas tsis tsuas yog txo nws cov peev txheej adsorption, tiam sis kuj cuam tshuam zoo tshaj plaws ntawm graphene nws tus kheej, yog li cuam tshuam txog kev ua tau zoo ntawm graphene reinforced composites. Ntxiv mus, qhov kev sib tham no yog irreversible, tshwj tsis yog daim ntawv thov ntawm sab nraud rog, xws li ultrasound thiab muaj zog tov, yog li ntawd tusyees dispersed. Yuav kom tau cov graphene zoo dua cov composites, cov neeg tshawb nrhiav tau ua tiav ib qho kev tshawb nrhiav hauv kev tawm tsam graphene agglomeration.

Ib qho kev siv ntau tshaj yog kev npaj tawm ntawm oxideized graphite thiab ultrasound, thiab muab txo kom graphene. Muaj ib qho kev xyuam xim van der Waals yuam ntawm lub graphene npaj nyob rau hauv hom no thiab yooj yim rau noog nyob rau hauv kev daws.

Lwm txoj kev yog los sib xyaw cov graphene nyob rau hauv cov organic solvent lossis cov kua tshuaj aqueous ntawm ib tug surfactant kom adsorb cov molecular lossis surfactant molecules nyob rau saum npoo ntawm graphene, thiab ua kom tiav cov teebmeem ntawm cov monoclinic graphene los ntawm cov neeg ua haujlwm qis qis thiab intermolecular quab yuam dispersion.

Lub peev xwm los thaiv cov agglomeration ntawm graphene los ntawm lub cev los yog kev hloov tshuaj kho tau pom tau tias, tab sis puas yog lub impurity nkag tau thaum lub sij hawm tsim ntawm cov kab ntawv cuam tshuam cov khoom ntawm qhov kev sib txuas ntawm cov txheej txheem kom tau kawm. Qee qhov kev hloov kho deg thiab lwm txoj kev kuj yuav siv los txhawm rau txhim kho cov khoom pov thawj.

Jiang los ntawm qhov kev hloov kho ntawm graphene, uas yog kev txhim kho tus qauv nruab nrab ntawm graphene thiab tooj liab matrix, polystyrene nyob rau hauv lub teeb tooj liab tawm ntawm cov ntaub ntawv puas. Lub morphology ntawm cov composites pom muaj uniformly dispersed nyob hauv matrix matrix.

Jing siv gallic acid nrog muaj zog txo kev muaj peev xwm li stabilizer thiab txo tus neeg sawv cev kom tau txais cov txheej txheem siab ntawm cov graphene. Lawv qhov kev xav yog vim muaj kev tsim ntawm kev sib txuas ntawm π-π kev sib txuas ntawm cov sib npaug benzene nplhaib thiab lub graphene hauv molecule, uas yog adsorbed nyob rau saum npoo ntawm lub graphene ua ib tus stabilizer.

Qhov no ua rau hauv daim ntawv thooj sab nraud muaj kev tiv thaiv tsis zoo, kom tsis txhob tuaj yeem txuam nrog cov graphene ua ke los ua kom yooj yim dua tuaj sib ntsib, kom paub tseeb tias qhov kev npaj graphene tau muaj kev sib tw siab.

Los ntawm qhov kev ntsuam xyuas saum toj no yuav pom, cov khoom los yog txheej txheem yuav siv tau los ua gravel tusyees dispersed hauv matrix, qhov no ua kom qhov kev ua tau zoo ntawm cov ntaub ntawv puas.


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