Bafuputsi ba Machaena ba theha moea o matla oa k'habone ea carbon

E khothalelitsoe ke ho feto-fetoha ha maemo le ho tsitsa ha li-silider silider tsa tlhaho, sehlopha sa lipatlisiso se etelletsoeng pele ke Prof. YU Shuhong oa Univesithi ea Saense le Theknoloji ea China (USTC) se thehile mokhoa o bonolo le o akaretsang oa ho qaqisa li-aerogels tse matla le tse tepelletseng tse hanyetsanang le carbon aerogels ka nanofibrous sebopeho sa marang-rang ka ho sebelisa resorcinol-formaldehyde resin e le mohloli o thata oa k'habone.

Chinese researchers develop superelastic hard carbon nanofiber aerogels1

Lilemong tse mashome tsa morao tjena, li-aerogel tsa khabone li 'nile tsa fuputsoa haholo ka ho sebelisa li-carbic tsa graphitic le li-carbons tse bonolo, tse bonts'ang melemo ho superelasticity. Li-aerogel tsena tse bonojoana hangata li na le li-micostrame tse bonolo tse nang le khatello e ntle ea mokhathala empa matla a phahameng. Li-carbons tse thata li bonts'a melemo e metle molemong oa mochini le ho tiea ha sebopeho ka lebaka la sebopeho sa "li-likarete tsa" karete ea sp3. Le ha ho le joalo, ho thatafala le ho fokola habonolo ho kena tseleng ea ho fihlela superelasticity ka libapali tse thata. Ho tla fihlela joale, e ntse e le phephetso ho iqapela li-aerogels tse thata tsa k'habone.

The polymerization ea li-moniners tsa resin e ile ea qalisoa boteng ba li-nanofibers joalo ka litempele tsa sebopeho ho lokisa hydrogel ka marang-rang a nanofibrous, e lateloa ke ho omisa le pyrolysis ho fumana carbon airgel e thata. Nakong ea polymerization, li-monomers li boloka li-template le ho kenya manonyeletso a fiber-fiber, li siee marang-rang a marang-rang a nang le manonyeletso a maholo. Ho feta moo, thepa ea 'mele (joalo ka li-diameter tsa nanofiber, density ea aerogels, le thepa ea mochini) e ka laoloa ka ho kopanya feela litempele le palo ea lisebelisoa tse tala.

Ka lebaka la li-nanofibers tse thata tsa k'habone le manonyeletso a mangata a qhoelitsoeng har'a li-nanofibers, li-aerogel tse thata tsa khase li bonts'a tšebetso e matla le e tsitsitseng ea mochini, ho kenyelletsa super-elasticity, matla a phahameng, lebelo le potlakileng haholo la ho hlaphoheloa (860 mm s-1) le tahlehelo e tlase ea tahlehelo ea motlakase ( <0.16). Kamora ho lekoa tlasa khatello ea 50% bakeng sa mabili a 104, carbon airgel e bonts'a feela 2% defform ea polasetiki, mme e bolokile khatello ea mantlha ea 93%.

Carbon airgel e thata e khona ho boloka maemo a phahame haholo maemong a thata, joalo ka nitrogen e nang le metsi. Ho ipapisitsoe le thepa e ntle ea mochini, li-air airgel tse thata li ts'episitse ts'ebetsong ea li-sensorer tsa khatello ea maikutlo tse nang le botsitso bo phahameng le mefuta e mengata ea bohloela (50 KPa), hammoho le bo-mokhanni ba otlolloang kapa ba huloang. Mokhoa ona o boloka tšepiso ea ho atolosoa ho etsa li-nanofibers tse ling ntle le khabin mme e fana ka mokhoa o tšepisang oa ho fetola thepa e thata hore e be lisebelisoa tse bobebe kapa tse fetohang ka ho rala li-micostructures tsa nanofibrous.


Nako ea ho romella: Mar-13-2020