Dab tsi yog Tus Kheej -Cov Khoom Siv Kho Mob?
Tus kheej- cov ntaub ntawv kho mob yog tsim los kho kev puas tsuaj tom qab nws tshwm sim, ua raws li cov txheej txheem lom neeg uas nyob hauv cov ntaub so ntswg rov qab los ntawm kev raug mob. Hauv cov ntsiab lus engineering, microcrack uas raug kaw thaum ntxov tiv thaiv qhov tawg los ntawm kev loj hlob mus rau hauv kev ua haujlwm tsis zoo, uas ua rau lub neej ua haujlwm ntev thiab txo kev txij nkawm. Aluminium tau dhau los ua ib qho tseem ceeb hauv ntau tus kheej- kho tshuab vim nws qhov kev ua haujlwm siab thiab nws lub peev xwm los tsim cov oxides ruaj khov: thaum lub qhov tawg qhib, cov khoom txhuas tso tawm ions uas cuam tshuam nrog ib puag ncig stimuli xws li noo noo thiab oxygen kom precipitate kho cov tebchaw zoo li aluminium hydroxide, sealing microcrack thiab rov kho cov neeg kho tshuab lub zog.
Yuav ua li cas Aluminium Enables Kho
Cov txheej txheem kho tau cia siab rau tib yam chemistry uas muab txhuas rau nws qhov kev tiv thaiv corrosion. Aluminium reacts nkag tau nrog oxygen thiab dej, thiab cov txheej txheem oxide los yog hydroxide tuaj yeem txuas cov teeb meem me me. Hauv nws tus kheej- kho cov polymers thiab cov khoom sib xyaw, cov khoom siv txhuas tau tawg mus rau hauv cov matrix kom cov khoom tshiab raug nthuav tawm thaum twg qhov tawg tawg. Cov kev tshawb fawb tsis ntev los no qhia txog kev tawg- kho tau zoo nyob ib puag ncig 85% nyob rau hauv ib puag ncig puag ncig rau txhuas-doped polymers. Kev tswj tsis tau oxidation tuaj yeem txo tau ntev - lub sijhawm ua haujlwm, tab sis cov txheej txheem encapsulation siab heev, xws li silica txheej, tam sim no siv los tswj cov tshuaj tiv thaiv thiab tiv thaiv cov khoom ua ntej kev puas tsuaj.
Kho tshuab siv Aluminium
Aluminium tau muab tso ua ke rau hauv peb lub hauv paus ntawm tus kheej - kho tshuab. Hauv microcapsule-raws li systems, aluminium- ntim cov tshuaj ntsiav rupture thaum lub tawg hla thiab tso cov tshuaj kho rau hauv thaj chaw puas. Hauv vascular systems, embedded channels los yog xov hlau xa cov khoom kho; aluminium hlau tuaj yeem yaj los ua cov kab nrib pleb nrog kev pab los ntawm cov cua sov hauv zos. Nyob rau hauv cov txheej txheem intrinsic, aluminium ions crosslink nrog polymer chains yog li cov khoom nws tus kheej tuaj yeem rov ua dua - khi ntawm qhov cuam tshuam puas. Cov piv txwv tshaj tawm muaj xws li txhuas-polyurethane microcapsules ua tiav txog 90% kho tsis pub dhau 24 teev, thiab bio{11}}kev tshoov siab cov tshuab uas ua raws li ntuj adhesion siv txhuas{12}}raws li complexes.
Cov txiaj ntsig rau Durability thiab Nyhav
Aluminium txhim kho kev ruaj khov hauv tus kheej- kho cov khoom sib xyaw los ntawm kev tsim cov txheej txheem oxide uas tiv thaiv kev xeb ntxiv ntawm qhov chaw puas. Nyob rau hauv epoxy composites, aluminium flakes tsim sacrificial bonds uas tawg thiab hloov kho nyob rau hauv kev ntxhov siab, dissipating zog; Cov kev sim qhia txog 40% nce hauv kev qaug zog tiv thaiv rau txhuas- cov txheej txheej ntxiv. Vim tias txhuas yog lub teeb yuag, nws qhov sib ntxiv tsis cuam tshuam rau cov khoom ntom ntom, uas tseem ceeb hauv qhov hnyav- cov haujlwm tseem ceeb xws li aerospace thiab kev thauj mus los. Cov cheeb tsam uas muaj peev xwm siv tau muaj xws li aerospace coatings thiab marine anti-fouling systems, qhov twg lub neej ua haujlwm ntev nyob rau hauv ib puag ncig hnyav yog qhov tseem ceeb.
Kev txwv thiab qhib kev sib tw
Ntau qhov kev txwv tseem nyob. Aluminium tuaj yeem raug cuam tshuam rau galvanic corrosion nyob rau hauv ib puag ncig conductive, uas yuav tsum tau insulating barriers nyob rau hauv lub composite tsim. High-purity aluminium yog kim heev rau kev siv loj- nplai, ua rau muaj kev txaus siab rau qis dua - lwm cov nqi xws li txhuas- silicon alloys. pH rhiab heev yuav txwv tsis pub siv biomedical, thiab cov kws tshawb fawb tab tom tsim pH-cov txheej txheem teb los daws qhov no. Recycling aluminium-muaj cov khoom sib xyaw kuj tseem nyuaj thiab tseem ceeb heev rau kev ruaj khov. Ua kom muaj kev sib cais tsis sib xws ntawm cov khoom hauv matrix yog lwm qhov teeb meem, feem ntau daws tau los ntawm sonication{11}} pab sib tov thaum tsim khoom.
Cov lus qhia yav tom ntej
Kev tshawb fawb tab tom mus rau nano-engineered core- plhaub cov qauv uas txhim kho kev ruaj ntseg thiab kev ua haujlwm catalytic, tshuab- kev kawm uas ua kom zoo dua qhov me me thiab kev faib tawm rau cov hom phiaj kho, thiab cov ntaub ntawv biohybrid xws li txhuas- khi peptides rau ntau eco- cov kev daws teeb meem zoo. Loj - cov txheej txheem ntau lawm, suav nrog electrospinning, tab tom raug sim rau kev ua lag luam. Lub hom phiaj ntawm qhov kawg yog ntau- voj voog tus kheej- kho, uas cov khoom tuaj yeem kho qhov kev puas tsuaj rov qab yam tsis muaj kev puas tsuaj. Rau cov neeg muab khoom siv txhuas, cov kev tsim kho no tsim kev sib txuas ntawm cov khoom tsim thiab cov khoom siv qib siab, thiab tib yam raw{11}} kev txawj ntse cov ntaub ntawv uas ua rau cov ntawv ci, daim ntawv thiab cov hmoov siv ncaj qha rau thaj chaw tshiab no.
FAQ
Q: Dab tsi yog lub luag haujlwm ntawm txhuas ua rau tus kheej - cov ntaub ntawv kho?
A: Aluminium ua raws li tus neeg sawv cev kho: thaum muaj kab nrib pleb tshwm sim, cov khoom txhuas tso tawm ions uas hnov mob nrog dej los yog oxygen los ua cov tebchaw uas kaw cov microcracks thiab rov ua kom lub zog.
Q: Yuav ua li cas aluminium txhim kho durability nyob rau hauv composites?
A: Nws tsim cov txheej txheem oxide passive uas tiv thaiv kev xeb ntxiv ntawm qhov chaw puas tsuaj, thiab txhuas flakes tsim cov khoom siv txiab uas cuam tshuam lub zog hauv kev ntxhov siab, txhim kho kev qaug zog.
Q: Dab tsi yog qhov tseem ceeb ntawm tus kheej - kho tshuab uas siv txhuas?
A: Peb lub hauv paus tseem ceeb yog microcapsule-raws li, vascular thiab intrinsic, nrog kev sib xyaw ua ke ntawm txhuas nrog lwm cov ntaub ntawv ua haujlwm kuj tseem nyob hauv kev kawm.
Q: Puas muaj kev txwv rau aluminium-raws li tus kheej- cov ntaub ntawv kho?
A: Yog, suav nrog galvanic corrosion nyob rau hauv ib puag ncig conductive, tus nqi siab -purity aluminium, pH rhiab heev hauv kev siv biomedical, kev sib tw dispersion thiab cov teeb meem rov ua dua tshiab.
Q: Puas yog txhuas hauv tus kheej -cov ntaub ntawv kho tau npaj rau kev lag luam?
A: Cov thev naus laus zis tseem tab tom txhim kho, nrog cov txiaj ntsig tau zoo hauv kev sim thiab kev sim tsim cov txheej txheem, thiab lub hom phiaj yog ntau- voj voog kho kom haum rau loj - kev loj hlob kev lag luam.
Q: Vim li cas aluminium thiaj xaiv dua lwm cov hlau rau kev kho mob?
A: Txhuas ua ke nrog kev ua haujlwm siab nrog lub teeb yuag li ntawm 2.7 g / cm3 thiab ruaj khov, tiv thaiv oxide chemistry, uas haum rau ob qho tib si kho cov txheej txheem thiab qhov hnyav lub hom phiaj ntawm aerospace thiab marine applications.
