Ndị nyocha China na-azụlite carbon drọrọk carbon nanofiber siri ike

Site n'ike mmụọ na mgbanwe nke eke udiri azụ silks webs, otu nyocha nke Prof. YU Shuhong sitere na Mahadum Sayensị na Teknụzụ nke China (USTC) mepụtara ụzọ dị mfe na nke zuru ezu iji mepụta superelastic na ike ọgwụgwụ na-eguzogide carbon aerogels siri ike na nanofibrous. Ihe owuwu netwọdu site na iji resorcinol-formaldehyde resin dị ka isi carbon dị ike.

Chinese researchers develop superelastic hard carbon nanofiber aerogels1

N’oge na-adịbeghị anya, ejirila carbons ndị na-eme ka ihe ndị ọzọ na-eme nchọpụta sara mbara karị na-egosi uru dị na superelasticity. Aerogels ndị a dị larịị na-enwekarị ụlọ nchekwa siri ike na ha na-eguzogide ike ọgwụgwụ ma ike na-agwụ ike. Ihe carbons siri ike na-egosi uru dị ukwuu na ike ọrụ yana nkwụsi ike n'ihi nrịba ama nke ụlọ “kaadị mgbazinye” nke sp3. Agbanyeghị, isi ike na nke siri ike na-enwetara n'ụzọ nke iji ike carbons sie ike. Ruo ugbu a, ọ ka bụ ihe ịma aka ịhazi ụdị ikuku ikuku superelastic siri ike.

A na - eme ka polymerization nke resin monomers nọ n'ihu ndị nanofibers dị ka ndebiri ahaziri iji dozie hydrogel na netwọọ nanofibrous, nke na - esochi nkụ na pyrolysis iji nwee ike ikuku ikuku. N'oge polymerization, ndị monomers na-etinye ego na ndebiri ma na-etinye nkwonkwo eriri-fiber, na-ahapụ nkwonkwo netwọkụ nwere nnukwu nkwonkwo siri ike. Ọzọkwa, enwere ike ịchịkwa ihe anụ ahụ (dịka dayameta nke nanofiber, ọtụtụ nke aerogels, na akụrụngwa) site na naanị ịmegharị ndebiri na ego nke ihe.

N'ihi ike nanofibers carbon siri ike na nnukwu nkwonkwo welded dị n'etiti ndị nanofibers, carbon aerogels siri ike na-egosipụta arụmọrụ arụmọrụ siri ike ma kwụsie ike, gụnyere nnukwu-elasticity, ike dị elu, ngwa ngwa mgbake ngwa ngwa (860 mm s-1) na obere ike ọnwụ ọnụọgụ ( <0.16). Mgbe agbasịrị ya n'okpuru ụdị 50% maka usoro 104, carbon airgel na-egosi naanị nrụpụta plastik 2%, wee nwee nrụgide mbụ.

Igwe ikuku na-eme ka carbon ike nwere ike idowe oke ibu n’ime onodu onodu ojoo, dika n’ime nitrogen nitric. Dabere na ihe eji eme ihe na-adọrọ adọrọ, carbon airgel a siri ike na-ekwe nkwa na itinye mgbakwunye nrụgide na nkwụsi ike na oke nyocha (50 KPa), yana ndị na-agbatị ma ọ bụ ndị na-emegharị ahụ. Usoro a nwere nkwa ka agbatịkwu iji mee ka ndị nanofibers ndị ọzọ na-abụghị carbon na-arụ ọrụ ma na-enye ụzọ dị mma maka ịgbanwe ihe ndị siri ike ka ọ bụrụ ihe na-agbanwe agbanwe ma ọ bụ na-agbanwe agbanwe site na ịkpụpụta obere ihe nje nanofibrous.


Oge nzipu ozi: Mar-13-2020