VaChina vanoongorora vanogadzira superelastic yakaoma kabhoni nanofiber aerogels

Ichikurudzirwa nekuchinjika uye kuomarara kwespider silika webs, timu yekutsvagisa inotungamirwa naProf YU Shuhong kubva kuYunivhesiti yeSainzi uye Technology yeChina (USTC) yakagadzira nzira iri nyore uye yakajairika yekugadzira superelastic uye kupera simba kurwisa kabhoni aerogels ne nanofibrous network chimiro nekushandisa resorcinol-formaldehyde resin seyakaoma kabhoni sosi.

Chinese researchers develop superelastic hard carbon nanofiber aerogels1

Mumakumi emakore apfuura, kabhoni aerogels akaongororwa zvakanyanya nekushandisa graphitic makabheji uye maparobhoti akapfava, ayo anoratidza zvakanakira mukurumbira. Aya elastic eerogels anowanzove ane madhidha micostroducte ane hutano hwakanaka hwekupisa asi simba reruralow. Hard carbons anoratidza zvakanakisa musimba meakimisheni uye nekugadzika kwechimiro nekuda kwesp3 C-indised turbostratic "imba-yemakadhi" chimiro. Nekudaro, iyo kuomarara uye kushaya simba zvakajeka kupinda munzira yekuzadzisa superelasticity nemakadhi akaomeswa. Kusvika pari zvino, zvichiri kunetsa kugadzira superelastic yakaoma kabhoni yakavakirwa aerogels.

Iyo polymerization ye Resin monomers yakavambwa pamberi peanofibers seyakarongeka matemplate kugadzirira hydrogel ine nanofibrous network, ichiteverwa nekuoma uye pyrolysis kuti iome kabhoni airgel. Munguva yekuita polymerization, monomers vanoisa pamatemplate uye vanoisa weld fiber-fiber majoini, vachisiya zvisingaite network network ine majoini ane simba akanyanya. Zvakare, zvigadzirwa zvemuviri (senge diameter ye nanofiberi, huwandu hwemaerogels, uye zvimakanika zvemuchina) zvinogona kudzorwa nekungogadzira matemplate uye huwandu hwezvinhu zvakagadzirwa.

Nekuda kweiyo yakaoma kabhoni nanofibers uye yakawanda majoini akaiswa mukati meanofibers, iyo yakaoma kabhoni aerogels inoratidza yakasimba uye yakagadzika mashandiro ekuita, kusanganisira super-elasticity, yakakwirira simba, yakanyanya kukurumidza kudzoreredza kukurumidza (860 mm s-1) uye yakaderera simba kurasikirwa kukwana ( <0.16). Mushure mekuyedzwa pasi pe50% dhizaina yemakiromita 104, kabhoni airgel inongoratidza 2% kupurasitiki kushomeka, uye yakachengeta 93% yekutanga kushushikana.

Iyo yakaoma kabhoni airgel inogona kuchengetedza iyo super-elasticity mumamiriro akaomesesa, akadai mumvura nitrogen. Kubva pane zvinonakidza zvemuchina zvinhu, iyi yakaoma kabhoni airgel ine chipikirwa mukushandiswa kwekushungurudzika sensors nekugadzikana kwakanyanya uye yakakura detector range (50 KPa), pamwe neanotakurika kana bendable conductors. Iyi nzira inobata vimbiso yekuwedzeredzwa kuti iite mamwe asiri-kabhoni akavakirwa akaumbwa nanofibers uye inopa nzira inovimbisa yekushandura zvinhu zvakaomarara kuita zvinhu zvakapetwa kana zvinoshanduka nekugadzira nanofibrous microstructures.


Nguva yekutumira: Mar-13-2020