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Vatsvagiri veChinese vanogadzira superelastic hard carbon nanofiber aerogels


Tichikurudzirwa nekuchinjika uye kusimba kwemadandemutande edandemutande, chikwata chetsvakurudzo chinotungamirirwa naProf. YU Shuhong kubva kuYunivhesiti yeSainzi neTekinoroji yeChina (USTC) vakagadzira nzira iri nyore uye yakajairika yekugadzira superelastic uye kuneta isingaite hard carbon aerogels ine nanofibrous. network chimiro nekushandisa resorcinol-formaldehyde resin seyakaoma kabhoni sosi.

Chinese researchers develop superelastic hard carbon nanofiber aerogels1

Mumakumi emakore achangopfuura, kabhoni aerogels akaongororwa zvakanyanya nekushandisa graphic kabhoni uye akapfava kabhoni, anoratidza zvakanakira superelasticity. Aya elastic aerogels anowanzo aine akatetepa mamicrostructures ane yakanaka kuneta kuramba asi simba rakaderera. Makabhoni akaomarara anoratidza mabhenefiti makuru musimba remagetsi uye kugadzikana kwechimiro nekuda kweiyo sp3 C-induced turbostratic "imba-yemakadhi" chimiro. Zvisinei, kuoma uye fragility zvinonyatsopinda munzira yekuwana superelasticity nemakabhoni akaoma. Kusvika parizvino, zvichiri kunetsa kugadzira superelastic hard carbon-based aerogels.

Iyo polymerization ye resin monomers yakatangwa pamberi penanofibers semagadzirirwo matemplate ekugadzirira hydrogel ine nanofibrous network, ichiteverwa nekuomesa uye pyrolysis kuti iwane yakaoma kabhoni aerogel. Munguva yepolymerization, mamonomers anoisa pamatemplate uye weld iyo fiber-fiber majoini, ichisiya isina kujairika network ine majoini makuru akasimba. Uyezve, zvimiro zvemuviri (zvakadai semadhayamita e nanofiber, densities yeaerogels, uye mashandiro emuchina) anogona kudzorwa nekungorongedza matemplate uye huwandu hwezvigadzirwa.

Nekuda kweakaomesesa kabhoni nanofibers uye akawanda welded majoini pakati pe nanofibers, iyo yakaoma kabhoni aerogels inoratidza yakasimba uye yakagadzikana mitambo yemitambo, kusanganisira super-elasticity, simba repamusoro, kukurumidza kukurumidza kupora (860 mm s-1) uye yakaderera simba kurasikirwa coefficient ( <0.16). Mushure mekuedzwa pasi pe50% kuomerwa kwegumi nemana, iyo kabhoni airgel inoratidza chete 2% yepurasitiki deformation, uye inochengeta 93% yekutanga kushushikana.

Iyo yakaoma kabhoni airgel inogona kuchengetedza iyo super-elasticity mumamiriro akaoma, senge mumvura nitrogen. Zvichienderana nezvinoyevedza zvemuchina, iyi yakaoma kabhoni airgel ine chivimbiso mukushandiswa kwemasensi sensors ane kugadzikana kwepamusoro uye yakafara detective renji (50 KPa), pamwe neanotambanuka kana bendable conductors. Iyi nzira ine vimbiso yekuwedzerwa kugadzira mamwe asiri-kabhoni akavakirwa composite nanofibers uye inopa inovimbisa nzira yekushandura yakaoma zvinhu kuita elastic kana inochinjika zvinhu nekugadzira iyo nanofibrous microstructures.

 

Post time: Mar-13-2020
 
 
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