Ligqugquzelwe ukuguquguquka nokuqina kolwembu lwesicabucabu semvelo, ithimba labacwaningi eliholwa nguProf. YU Shuhong waseNyuvesi Yesayensi Nobuchwepheshe YaseChina (USTC) lenze indlela elula nevamile yokwenza ama-aerogel aqinile ekhabhoni aqinile ane-nanofibrous ane-superelastic kanye nokukhathala. isakhiwo senethiwekhi ngokusebenzisa i-resorcinol-formaldehyde resin njengomthombo wekhabhoni eqinile.
Emashumini eminyaka amuva nje, ama-aerogel e-carbon ahlolwe kabanzi ngokusebenzisa amakhabhoni e-graphic nama-soft carbons, abonisa izinzuzo ku-superelasticity. Lawa ma-aerogel anwebekayo ngokuvamile anezakhiwo ezincane ezithambile ezinokumelana okuhle nokukhathala kodwa amandla aphansi kakhulu. Amakhabhoni aqinile akhombisa izinzuzo ezinhle emandleni emishini kanye nokuzinza kwesakhiwo ngenxa yesakhiwo se-sp3 C-induced turbostratic "house-of-cards". Nokho, ukuqina kanye fragility kungena ngokucacile endleleni yokufeza superelasticity nge-hard carbons. Kuze kube manje, kuseyinselele ukwenza ama-aerogel asuselwa kukhabhoni aqinile.
I-polymerization yama-resin monomers yaqalwa phambi kwama-nanofibers njengezifanekiso zesakhiwo ukulungiselela i-hydrogel enamanethiwekhi e-nanofibrous, okulandelwa ukomiswa kanye ne-pyrolysis ukuze kutholakale i-hard carbon aerogel. Ngesikhathi se-polymerization, ama-monomers afaka ezifanekisweni futhi ashise amalunga e-fiber-fiber, okushiya uhlaka lwenethiwekhi olungahleliwe olunamajoyini amakhulu aqinile. Ngaphezu kwalokho, izakhiwo ezibonakalayo (ezifana namadayamitha we-nanofiber, ukuminyana kwama-aerogel, kanye nezakhiwo eziwumshini) zingalawulwa ngokumane kushunwe izifanekiso kanye nenani lezinto zokusetshenziswa.
Ngenxa yama-carbon nanofibers aqinile kanye namajoyinti ashiselwe amaningi phakathi kwama-nanofibers, ama-aerogel ekhabhoni aqinile abonisa ukusebenza kwemishini okuqinile nokuzinzile, okuhlanganisa ukunwebeka okukhulu, amandla aphezulu, isivinini sokululama ngokushesha kakhulu (860 mm s-1) kanye ne-coefficient yokulahlekelwa amandla okuphansi ( <0.16). Ngemva kokuhlolwa ngaphansi kwe-50 % uhlobo lwemijikelezo engu-104, i-carbon airgel ibonisa kuphela ukuguqulwa kwepulasitiki okungu-2%, futhi igcine ukucindezeleka kwasekuqaleni okungama-93%.
I-hard carbon airgel ingagcina i-super-elasticity ezimweni ezinzima, njenge-nitrogen eyi-liquid. Ngokusekelwe ezicini ezihehayo zemishini, le-airgel ye-carbon eqinile inesithembiso ekusetshenzisweni kwezinzwa zokucindezeleka ezinokuzinza okuphezulu nobubanzi babaseshi obubanzi (50 KPa), kanye namakhondaktha anwebekayo noma agobekayo. Le ndlela inesithembiso sokunwetshwa ukuze kwenziwe amanye ama-nanofiber ayinhlanganisela asekelwe kukhabhoni futhi inikeza indlela ethembisayo yokuguqula izinto eziqinile zibe izinto ezinwebekayo noma eziguquguqukayo ngokuklama ama-nanofibrous microstructures.
Post time: Mar-13-2020