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Masu bincike na kasar Sin suna haɓaka na'urorin aerogels na carbon nanofiber


Sakamakon sassauci da tsattsauran ra'ayin yanar gizo na gizo-gizo siliki na halitta, ƙungiyar bincike karkashin jagorancin Farfesa YU Shuhong daga Jami'ar Kimiyya da Fasaha ta China (USTC) sun ɓullo da wata hanya mai sauƙi da gama gari don ƙirƙira superelastic da gajiya mai jure wahalar carbon aerogels tare da nanofibrous. tsarin cibiyar sadarwa ta amfani da resorcinol-formaldehyde resin a matsayin tushen carbon mai wuya.

Chinese researchers develop superelastic hard carbon nanofiber aerogels1

A cikin 'yan shekarun nan, an bincika abubuwan da ake amfani da su na carbon aerogels ta hanyar amfani da carbons mai hoto da kuma carbons masu laushi, waɗanda ke nuna fa'ida a cikin haɓakar haɓaka. Wadannan aerogels na roba yawanci suna da ƙananan ƙananan ƙwayoyin cuta tare da kyakkyawan juriya na gajiya amma ƙarancin ƙarfi. Hard carbons suna nuna babban fa'ida a cikin ƙarfin injina da kwanciyar hankali na tsari saboda tsarin "gidan-katuna" turbostratic sp3 C. Koyaya, taurin kai da rauni a fili suna kan hanyar samun babban ƙarfi tare da carbons masu wuya. Har zuwa yanzu, har yanzu ƙalubale ne don ƙirƙira superelastic hard carbon tushen aerogels.

An ƙaddamar da polymerization na resin monomers a gaban nanofibers azaman samfuri na tsari don shirya hydrogel tare da cibiyoyin sadarwa na nanofibrous, sannan bushewa da pyrolysis don samun iskar carbon aerogel. A lokacin polymerization, monomers suna ajiya akan samfuri kuma suna walda gidajen haɗin fiber-fiber, suna barin tsarin hanyar sadarwa na bazuwar tare da ƙaƙƙarfan haɗin gwiwa masu ƙarfi. Haka kuma, ana iya sarrafa kaddarorin jiki (kamar diamita na nanofiber, yawan aerogels, da kaddarorin inji) ta hanyar daidaita samfuran kawai da adadin albarkatun ƙasa.

Saboda da wuya carbon nanofibers da yalwar welded gidajen abinci a tsakanin nanofibers, da wuya carbon aerogels nuna karfi da kuma barga inji wasanni, ciki har da super-elasticity, high ƙarfi, musamman sauri murmurewa gudun (860 mm s-1) da kuma low makamashi asara coefficient (860 mm s-1). <0.16). Bayan da aka gwada a ƙarƙashin 50% iri don hawan keke 104, carbon airgel yana nuna nakasar filastik 2 kawai, kuma yana riƙe da 93% danniya na asali.

Jirgin iska mai ƙarfi na carbon zai iya kula da elasticity mai girma a cikin yanayi mai tsauri, kamar a cikin ruwa nitrogen. Dangane da kaddarorin injina masu ban sha'awa, wannan iska mai ƙarfi na carbon airgel yana da alƙawarin a cikin aikace-aikacen na'urori masu auna damuwa tare da babban kwanciyar hankali da kewayon bincike mai faɗi (50 KPa), da kuma masu ɗaurin ɗaure ko lanƙwasa. Wannan tsarin yana ɗaukar alƙawarin tsawaita don yin wasu nanofibers waɗanda ba na carbon ba kuma suna ba da kyakkyawar hanya ta canza ƙaƙƙarfan kayan zuwa kayan roba ko sassauƙa ta hanyar zayyana ƙananan nanofibrous.

 

Post time: Mar-13-2020
 
 
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