Ofufuza achi China amapanga superelastic hard carbon nanofiber aerogels

Mothandizidwa ndi kusinthasintha komanso kusakhazikika kwa ma kangaude wa ma kangaude, gulu lofufuza lomwe likutsogoleredwa ndi Prof YU Shuhong waku University of Science and Technology of China (USTC) lidapangika njira yosavuta yopangira kapangidwe kabwino kaukazitape komanso kutopa kolimba kwa mpweya wamphamvu wodziletsa ndi nanofibrous makina ogwiritsa ntchito resorcinol-formaldehyde resin ngati mpweya wolimba wa kaboni.

Chinese researchers develop superelastic hard carbon nanofiber aerogels1

M'zaka makumi angapo zapitazi, ma aerogels a carbon akhala akufufuzidwa kwambiri pogwiritsa ntchito makanema ojambula pamanja ndi ma carbons ofewa, omwe amawonetsa zabwino mu superelasticity. Izi zotanuka aerogels nthawi zambiri zimakhala ndi microfatrate wosakhazikika bwino kutopa koma Ultralow mphamvu. Makatoni olimba amawonetsa zabwino pamakina ochita kupanga komanso kukhazikika kwamapangidwe chifukwa cha mawonekedwe a sp3 C-anachititsa turbostratic "nyumba yamakhadi". Komabe, kuuma ndi kusayenda bwino kumalowa m'njira yopambana. Mpaka pano, ndizovuta kuti apange ma aerogels a superelastic hard-carbon.

Ma polymerization a ma resin monomers adayambitsidwa pamaso pa nanofibers ngati ma templates aumbidwe kuti akonze hydrogel ndi ma nanofibrous network, ndikutsatira kuyanika ndi pyrolysis kuti muvutitse kaboni airgel. Pa polima, ma monomers amasungunula ma templates ndikuwonjezera mafupa a fiber-fiber, nasiya njira yolumikizidwa ndi ma network yolimba kwambiri. Komanso, zinthu zakuthupi (monga ma diameter a nanofiberi, kachulukidwe ka aerogels, ndi makina opangira makina) zitha kuwongoleredwa pongokhazikitsa ma templates komanso kuchuluka kwa zinthu zopangira.

Chifukwa cholimba kaboni nanofibers komanso kulumikizana kwakanthawi pakati pa ma nanofibers, ma carbon aerogels olimba amawonetsa zolimba komanso zisudzo zamagetsi, kuphatikiza kuthamanga kwambiri, kulimba kwambiri, kuthamanga mwachangu kwambiri (860 mm s-1) komanso kuchepa mphamvu kochepa mphamvu ( <0.16). Pambuyo poyesedwa pansi pamavutidwe a 50% pamizungu 104, kaboni airgel amawonetsa 2% kupulasitiki kokha, ndikusunga kupsinjika kwa 93% koyambirira.

Mpweya wolimba wa kaboni umatha kupitiliza kukhala pamalo opsinjika kwambiri, monga ma nitrogen amadzimadzi. Kutengera zochititsa chidwi zamakina, kabuloni wolimba uyu walonjeza pakugwiritsa ntchito masensa opsinjika kwambiri komanso okhazikika osiyanasiyana (50 KPa), komanso oyendetsa kapena otambasamba. Njirayi imalonjeza kuti iwonjezeredwa kuti ipange ma nanofibers ena osakhala kaboni ndipo imapereka njira yolimbikitsa yosinthira zinthu zolimba kuti zikhale zopangira kapena zosinthika mwa kupanga ma micostructures a nanofibrous.


Nthawi yopuma: Mar-13-2020