Kev tshoov siab los ntawm qhov yooj yim thiab nruj ntawm cov kab laug sab silks webs, ib pab neeg tshawb fawb coj los ntawm Prof. YU Shuhong los ntawm University of Science thiab Technology ntawm Tuam Tshoj (USTC) tau tsim ib txoj hauv kev yooj yim thiab dav los tsim cov superelastic thiab qaug zog resistant hard carbon aerogels nrog nanofibrous. network qauv los ntawm kev siv resorcinol-formaldehyde resin ua ib qho nyuaj carbon.

Nyob rau hauv xyoo tsis ntev los no, carbon aerogels tau lug tshawb fawb los ntawm kev siv graphitic carbons thiab mos carbons, uas qhia tau hais tias zoo nyob rau hauv superelasticity. Cov elastic aerogels feem ntau muaj cov qauv me me nrog kev qaug zog zoo tab sis lub zog ultralow. Cov carbons nyuaj qhia tau zoo heev hauv kev siv lub zog thiab kev ruaj ntseg vim yog sp3 C-induced turbostratic "tsev-ntawm-phaib" qauv. Txawm li cas los xij, qhov tawv thiab fragility kom meej meej tau txais nyob rau hauv txoj kev ua tiav superelasticity nrog cov carbons nyuaj. Txog rau tam sim no, nws tseem yog ib qho kev sib tw los tsim superelastic nyuaj carbon-based aerogels.

Lub polymerization ntawm resin monomers tau pib nyob rau hauv lub xub ntiag ntawm nanofibers raws li cov qauv qauv los npaj ib hydrogel nrog nanofibrous tes hauj lwm, ua raws li los ntawm kev ziab thiab pyrolysis kom tau cov carbon aerogel nyuaj. Thaum lub sij hawm polymerization, cov monomers tso rau ntawm cov qauv thiab welding cov fiber-fiber pob qij txha, tawm hauv random network qauv nrog cov pob qij txha loj heev. Ntxiv mus, lub cev lub cev (xws li txoj kab uas hla ntawm nanofiber, qhov ntom ntawm aerogels, thiab cov khoom siv kho tshuab) tuaj yeem tswj tau los ntawm cov qauv yooj yim tuning thiab tus nqi ntawm cov khoom siv raw.

Vim tias cov roj carbon nanofibers nyuaj thiab cov pob qij txha welded ntau ntawm cov nanofibers, cov roj carbon aerogels muaj zog thiab ruaj khov kev ua haujlwm, suav nrog super-elasticity, siab zog, tsis tshua muaj zog rov qab ceev (860 hli s-1) thiab qis zog poob coefficient ( <0.16). Tom qab kuaj nyob rau hauv 50% strain rau 104 cycles, cov pa roj carbon airgel pom tsuas yog 2% yas deformation, thiab khaws cia 93% qub kev ntxhov siab.

Lub zog carbon airgel tuaj yeem tswj tau qhov super-elasticity hauv cov xwm txheej hnyav, xws li hauv cov kua nitrogen. Raws li cov khoom muaj txiaj ntsig zoo, lub zog carbon airgel no tau cog lus nyob rau hauv daim ntawv thov ntawm kev ntxhov siab sensors nrog kev ruaj ntseg siab thiab ntau yam kev tshawb nrhiav (50 KPa), nrog rau cov khoom sib txuas los yog khoov tau. Txoj hauv kev no tau cog lus tias yuav txuas ntxiv mus ua lwm yam uas tsis yog cov pa roj carbon monoxide nanofibers thiab muab txoj hauv kev zoo ntawm kev hloov cov ntaub ntawv nruj rau hauv cov ntaub ntawv elastic lossis hloov tau los ntawm kev tsim cov nanofibrous microstructures.