Fa'aosofia e le fetu'una'i ma le ma'a'a'a o upega silika apogaleveleve, o se 'au su'esu'e na ta'ita'ia e Prof. YU Shuhong mai le Iunivesite o Saienisi ma Tekonolosi o Saina (USTC) na fausia se auala faigofie ma lautele e fau ai superelastic ma fatigue resistant hard carbon aerogels with nanofibrous fausaga feso'ota'iga e ala i le fa'aogaina o le resini resorcinol-formaldehyde e fai ma puna kaponi malosi.

In recent decades, carbon aerogels have been widely explored by using graphitic carbons and soft carbons, which show advantages in superelasticity. These elastic aerogels usually have delicate microstructures with good fatigue resistance but ultralow strength. Hard carbons show great advantages in mechanical strength and structural stability due to the sp3 C-induced turbostratic “house-of-cards” structure. However, the stiffness and fragility clearly get in the way of achieving superelasticity with hard carbons. Up to now, it is still a challenge to fabricate superelastic hard carbon-based aerogels.

O le polymerization o resin monomers na amataina i le i ai o nanofibers e fai ma faʻataʻitaʻiga faʻatulagaina e saunia ai se hydrogel ma nanofibrous networks, sosoo ai ma le faʻamago ma le pyrolysis e maua ai le carbon aerogel malosi. I le taimi o le polymerization, o le monomers e teu i luga o faʻataʻitaʻiga ma faʻapipiʻi soʻoga fiber-fiber, ma tuʻu ai se fausaga fesoʻotaʻiga faʻatasi ma soʻoga malosi tetele. E le gata i lea, o meatotino faʻaletino (e pei o diameters o nanofiber, densities of aerogels, ma mea faʻainisinia) e mafai ona faʻatonutonuina i le naʻo le faʻaogaina o mamanu ma le aofaʻi o mea mataʻutia.

Ona o le malosi carbon nanofibers ma le tele o sooga faʻapipiʻi i totonu o nanofibers, o le carbon aerogels e faʻaalia ai le malosi ma le mautu o faʻatinoga faʻainisinia, e aofia ai le super-elasticity, maualuga le malosi, vave tele le toe faʻaleleia vave (860 mm s-1) ma le maualalo o le malosi o le gau ( <0.16). A maeʻa ona faʻataʻitaʻiina i lalo ole 50% faʻamalosi mo le 104 taamilosaga, o le carbon airgel e faʻaalia naʻo le 2% palasitika faʻaleagaina, ma taofia ai le 93% muamua faʻamaʻi.

O le malosi carbon airgel e mafai ona faatumauina le super-elasticity i tulaga faigata, e pei o le nitrogen vai. Faʻavae i luga o mea faʻainisinia mataʻina, o lenei ea malulu carbon e iai le folafolaga i le faʻaogaina o masini faʻamalosi e maualuga le mautu ma le lautele o le leoleo (50 KPa), faʻapea foʻi ma taʻavale e mafai ona faʻapipiʻiina pe faʻapipiʻi. O lenei faiga o lo'o fa'amauina ai le folafolaga e fa'alautele atu e fai ai isi nanofibers tu'ufa'atasi e le fa'avae kaponi ma maua ai se auala fa'amoemoe e fa'aliliu ai mea mautū i mea fa'ama'i pe fetu'una'i e ala i le fa'ata'atiaina o le nanofibrous microstructures.