Cov khoom ntawm cov pa roj carbon nanotubes
CNTs muaj cov tshuaj sib xyaw yooj yim thiab daim ntawv sau ua piv, tseem yog cov teeb tsa ntau yam thiab muaj kuab lom. Vim tias nws tuaj yeem raug suav tias yog cov ntawv kaw rau cov thooj voos kheej, nws muaj cua sov ua kom sov, thiab cov hluav taws xob ua kom zoo, ntawm cov khoom siv hluav taws xob zoo heev. Txawm li cas los xij, kev sib xyaw ntawm qhov loj me, qauv, thiab cov ntsiab lus topological xaus nrog cov cim tshwj xeeb thiab kev cog lus cov kev thov kev cia siab.
(1) Cov Khoom Siv Neeg Kho Tshuab:
Cov qauv theem pib ntawm CNTs yog zoo li ntawm graphene, muaj cov sib txoos uas muaj zog tshaj plaws hauv xwm, tsim los ntawm C-} C Bonds los ntawm SP2 hybridization. Nws muaj tsis tshua muaj neeg muaj zog. Lub axial elastic modulus ntawm CNTs yog tam sim no tau kwv yees kom ze rau ntawm Graphene cov ntaub ntawv ob leeg theoretically thiab sim. Vim yog qhov tseeb tias CNTs yog hollow tawb qauv nrog lub kaw kev hloov pauv, yog li muaj peev xwm tiv thaiv cov nplais tensile ntau dua 40%. Yog li ntawd, CNTs muaj lub zog siab heev thiab elastic maculus. Cov tub ntxhais hluas lub modulus ntawm ib leeg-walled carbon nanotubes ntsuas hluav taws xob tuaj yeem ncav cuag tau tib yam li ntawm pob zeb diamond, kwv yees li 5 zaug ntawm cov hlau. Nws theoretical tensile lub zog yog 100 zaus ntawm cov hlau, thaum nws ntom ntom tsuas yog 1/6 ntawm cov hlau; Ntxiv mus, nws muaj kev nyuaj heev thiab yoog tau. Qhov theoretical ntau tshaj elongation tuaj yeem ncav cuag 20%, thiab SWNTs tuaj yeem tiv thaiv torsional ntawm deformation thiab bent mus rau hauv ib ncig me. Tom qab kev ntxhov siab tshem tawm, lawv tuaj yeem rov qab los rau lawv thawj lub xeev.
Cov tub ntxhais hluas lub modulus ntawm ntau lub walled Carbon Nanotubes yog 200-400 GPA, tus khoov nro yog 14 GPA, thiab cov anti-sib ntswg nro yog 100 GPA. Lub zog ntawm cov pa roj carbon nanotubes yog 200 lub sij hawm siab tshaj li lwm cov fibers thiab tuaj yeem tiv taus 1 lab atmospheres yam tsis muaj tawg.
Lub zog thiab tawv ntawm CNTs yog farior zoo dua rau cov ntaub ntawv fiber ntau.
(2) hluav taws xob cov khoom:
Cov pa roj carbon atoms ntawm CNTs yog SP2-hybridized, thiab txhua cov pa roj Atom muaj ib txoj hauj lwm hauv nruab nrog.
Ntawm P Orbitals txiav rau txheej txheej, yog li CNTs muaj hluav taws xob hluav taws xob zoo. Lub zog sib txawv ntawm CNTs yog cuam tshuam los ntawm cov noob me me cuam tshuam vim yog cov qauv helical lossis txoj kab sib txawv. Nrog cov qib sib txawv thiab cov diameters, lub zog sib txuas rau cov hluav taws xob roj carbon monoxide Tsis tas li ntawd, cov lus tsa suab radial ntawm cov tshuab hluav taws xob hauv CNTs raug txwv, thaum lub sij hawm raug cai cuam tshuam, thaum lub cav hluav taws xob tsis txwv txhua. Lub radial tsis kam ntawm CNTs ntau dua li cov axial tsis kam, thiab cov anisotropy ntawm kev tawm tsam nce nrog qhov txo qis hauv qhov kub.
(3) Cov Khoom Cua Sov:
CNTs ua kom pom cov kub ua kom sov zoo tshaj plaws. Vim tias lawv cov kev sib txuam loj heev, lawv cov kev ua haujlwm kub ua raws qhov kev coj ua ntev heev, thaum lawv cov kev coj ua cua sov hauv cov kev taw qhia ntsug yog qhov qis. Los ntawm cov kev qhia tsim nyog, CNTs tuaj yeem siv los npaj cov khoom siv kub siab anisotropic tshav kub kub. Qhov siab dua qib ntawm graphiteification ntawm carbon, qhov ntau dua nws thermal conductivity. Tsis tas li ntawd, CNTs muaj qhov siab thermal conductivity. Raws li ntev raws li ib qho me me ntawm cov pa roj carbon nanotubes yog doped hauv cov khoom siv sib xyaw, cov thermal conductivity ntawm cov khoom sib xyaw uas zoo li yuav tau txhim kho.
(4) cov khoom cua kub:
Vim yog lawv qhov loj tshwj xeeb thaj chaw thaj chaw, lub zog saum ntuj loj thiab nto los ntawm lub zog ua haujlwm thiab cov hluav taws xob hluav taws xob zoo nkauj thiab hluav taws xob zoo nkauj. Lawv muaj ntau yam khoom xws li adsorption muaj peev xwm rau reactants thiab cov khoom lag luam, nrog rau cov kab noj hniav tshwj xeeb stereoscopic. Cov pa roj carbon nanotubes tuaj yeem adsorb cov molecules ntawm qhov loj me rau lawv cov diamerers sab hauv. Los ntawm kev siv cov chaw nquag ntawm qhov qhib sab saum toj raws li cov ntsiab lus particrebents, lawv tuaj yeem tshaj tawm qee qhov kev nquag ua haujlwm thiab ua cov txheej txheem zoo molecular-theem catalysts. Ib qho ntxiv, cov nanotubes tseem tuaj yeem siv ua nano-template hauv kev sib zog ua ke, uas yog qhov ua tau zoo tshaj plaws rau kev tsim cov khoom siv Nanoscale thiab npaj ib qho-seem nanowenses.
(5) biocompatibility:
CNTS qauv yog ruaj khov thiab tsis yooj yim degrade, thiab nws muaj hydrophobic nto. Thaum siv nyob rau hauv biomedical cov ntaub ntawv, lawv biocompatibility yuav tsum tau coj mus rau kev xav. Kev tshawb fawb tau pom tias los ntawm kev kho nrog roj ntsha molecules, lawv cov biocompatibility tuaj yeem txhim kho. Ntxiv mus, muaj qhov muaj zog π-π kev sib cuam tshuam ntawm cov CNTs thiab ntau ntau cov tshuaj lwg me me. Yog li ntawd, lawv yuav tsum tau siv los ua cov khoom siv tshuaj yeeb, biosensors, thiab cov catalals, thiab yuav ua lub luag haujlwm tseem ceeb hauv kev biomedical teb.
(6) kev ua haujlwm catalysic:
Cov ntaub ntawv carbon yog inherly cov ntaub ntawv zoo heev thiab yog siv dav hauv kev tsim cov tshuaj lom neeg. CNTs kuj muaj cov qauv muaj kab noj hniav tshwj xeeb thiab tseem muaj peev xwm adsorption zoo, thiab tseem muaj cov neeg nqa khoom zoo heev. Yog li ntawd, CNTs tseem qhia tau kev thov cov ntawv thov kev cia siab hauv catalysis.
Qhov no yog cov ncauj lus qhia ntxaws txog cov khoom ntawm carbon nanotubes. Peb cia siab cov ntaub ntawv saum toj no tuaj yeem pab tau koj. Peb lub tuam txhab lub vev xaib tseem muaj ntau lwm cov khoom lag luam. Koj tuaj yeem mus saib lub vev xaib kom muaj kev nkag siab tob.