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Abashakashatsi b'Abashinwa batezimbere cyane ya karubone nanofiber aerogels


Itsinda ry’ubushakashatsi riyobowe na Prof. YU Shuhong wo muri kaminuza y’ubumenyi n’ikoranabuhanga mu Bushinwa (USTC) ryatewe inkunga n’ubworoherane n’igitagangurirwa cy’ibitagangurirwa by’ibitagangurirwa, byashyizeho uburyo bworoshye kandi rusange bwo guhimba ibyuka bya karubone bikabije bya karubone hamwe na nanofibrous imiterere y'urusobe ukoresheje resorcinol-formaldehyde resin nkisoko ikomeye ya karubone.

Chinese researchers develop superelastic hard carbon nanofiber aerogels1

Mu myaka ya vuba aha, aerogels ya carbone yakozweho ubushakashatsi hakoreshejwe karubone ya grafitike na karubone yoroshye, byerekana ibyiza muri superelastique. Aerogels ya elastike isanzwe ifite microstructures nziza kandi irwanya umunaniro mwiza ariko imbaraga za ultralow. Carbone ikomeye yerekana ibyiza bikomeye mumbaraga zubukanishi no gutuza kumiterere bitewe na sp3 C iterwa na turbostratic "inzu-y-amakarita". Ariko, gukomera no gucika intege biragaragara muburyo bwo kugera kuri superelastique hamwe na karubone ikomeye. Kugeza ubu, biracyari ingorabahizi guhimba superelastique ikomeye ya karubone ishingiye kuri aerogels.

Polymerisation ya resin monomers yatangijwe imbere ya nanofibers nkicyitegererezo cyubaka kugirango itegure hydrogel hamwe numuyoboro wa nanofibrous, hanyuma ikumishwa na pyrolysis kugirango ibone umwuka wa karubone ukomeye. Mugihe cya polymerizasiya, monomers ibika kuri templates hanyuma igasudira fibre fibre, igasiga imiterere y'urusobe rudasanzwe hamwe ningingo nini zikomeye. Byongeye kandi, ibintu bifatika (nka diameter ya nanofibre, ubucucike bwa aerogels, hamwe nubukanishi) birashobora kugenzurwa no guhuza inyandikorugero nubunini bwibikoresho fatizo.

Bitewe na karubone ikomeye ya karubone hamwe nudusimba twinshi dusudira muri nanofibers, aerogels ikomeye ya carbone yerekana imikorere ikomeye kandi ihamye, harimo super-elastique, imbaraga nyinshi, umuvuduko ukabije wihuse (860 mm s-1) hamwe na coefficient yo gutakaza ingufu nke ( <0.16). Nyuma yo kugeragezwa munsi ya 50% kumuzingo 104, umwuka wa karubone werekana 2% gusa byahinduwe na plastike, kandi bikagumana 93% byumwimerere.

Umwuka wa karubone ukomeye urashobora gukomeza super-elastique mubihe bibi, nko muri azote yuzuye. Ukurikije imiterere yubukanishi ishimishije, iyi karubone ikomeye ya karubone ifite amasezerano mugushira mu bikorwa ibyuma bifata ibyuma bihangayikishije kandi bigahagarara neza (50 KPa), hamwe n’umuyoboro urambuye cyangwa uhetamye. Ubu buryo butanga amasezerano yo kwagurwa kugirango habeho izindi nofibers zishingiye kuri karubone kandi zitanga inzira nziza yo guhindura ibikoresho bikomeye mubikoresho byoroshye cyangwa byoroshye mugushushanya microstructures ya nanofibrous.

 

Post time: Mar-13-2020
 
 
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