Kodi graphene ndi chiyani?
Graphene ndi chinthu chatsopano cha hexagonal uchi chopangidwa ndi kulongedza kwapafupi kwa maatomu a kaboni osanjikiza amodzi. M'mawu ena, ndi awiri dimensional mpweya zakuthupi ndi wa chinthu chomwecho heteromorphic thupi la carbon element. Kugwirizana kwa ma molekyulu a graphene ndi 0.142 nm yokha, ndipo malo a crystal ndege ndi 0.335 nm okha.
Anthu ambiri alibe lingaliro la gawo la nano. Nano ndi gawo lalitali. Nano imodzi imakhala pafupifupi 10 kuchotsera 9 masikweya mita. Ndi lalifupi kwambiri kuposa bakiteriya ndipo ndi lalikulu kwambiri ngati ma atomu anayi. Mulimonsemo, sitingathe kuwona chinthu cha 1 nm ndi maso athu amaliseche. Tiyenera kugwiritsa ntchito microscope. Kupezeka kwa nanotechnology kwabweretsa magawo atsopano achitukuko kwa anthu, ndipo graphene ndiukadaulo wofunikira kwambiri woyimira.
Mpaka pano, graphene ndiye gulu la thinnest lomwe lapezeka padziko lapansi la anthu. Kukhuthala kwake kumangofanana ndi atomu imodzi. Panthawi imodzimodziyo, ndizinthu zopepuka komanso zowongolera zamagetsi zabwino kwambiri padziko lonse lapansi.
Anthu ndi graphene
Komabe, mbiri ya anthu ndi graphene yakhalapo kwa zaka zoposa theka. Kumayambiriro kwa 1948, asayansi anapeza kukhalapo kwa graphene m’chilengedwe. Komabe, panthawiyo, zinali zovuta kuti mulingo wa sayansi ndi umisiri uchotse graphene kuchokera pagawo limodzi, kotero kuti ma graphene awa adayikidwa palimodzi, kuwonetsa mkhalidwe wa graphite. 1 mm iliyonse ya graphite imakhala ndi zigawo pafupifupi 3 miliyoni za graphene.
Koma kwa nthawi yaitali, graphene ankaonedwa kuti kulibe. Anthu ena amaganiza kuti ndi chinthu chomwe asayansi amalingalira, chifukwa ngati graphene ilipodi, nchifukwa chiyani asayansi sangathe kuichotsa yokha?
Mpaka 2004, asayansi Andre Geim ndi Konstantin Volov ochokera ku yunivesite ya Manchester ku UK adapeza njira yolekanitsira graphene. Iwo adapeza kuti ngati ma graphite amachotsedwa ku graphite ya pyrolytic kwambiri, ndiye kuti mbali ziwiri za graphite flakes zimamangiriridwa ku tepi yapadera, ndiyeno tepiyo inang'ambika, njirayi ikhoza kulekanitsa bwino ma graphite flakes.
Pambuyo pake, muyenera kubwereza zomwe zili pamwambapa mosalekeza kuti pepala la graphite lili m'manja mwanu likhale lochepa komanso lochepa. Pomaliza, mutha kupeza pepala lapadera lopangidwa ndi maatomu a kaboni okha. Zomwe zili patsamba ili ndi graphene. Andre Geim ndi Konstantin Novoselov adapambananso Mphotho ya Nobel pakupeza graphene, ndipo omwe adati graphene kulibe adamenyedwa kumaso. Ndiye n'chifukwa chiyani graphene angasonyeze makhalidwe amenewa?
Graphene, mfumu ya zipangizo
graphene itapezeka, idasinthiratu masanjidwe a kafukufuku wasayansi padziko lonse lapansi. Popeza kuti graphene ndi zinthu zoonda kwambiri padziko lonse lapansi, gilamu imodzi ya graphene ndiyokwanira kuphimba mabwalo a mpira wamba. Kuphatikiza apo, graphene imakhalanso ndi matenthedwe abwino kwambiri komanso magetsi.
graphene yoyera yopanda wosanjikiza imodzi imakhala ndi matenthedwe amphamvu kwambiri, ndipo matenthedwe ake ndi okwera mpaka 5300w / MK (w / m · digiri: poganiza kuti makulidwe amodzi azinthu ndi 1m ndi kusiyana kwa kutentha pakati pa mbali ziwiri ndi 1C, zinthuzi zimatha kutentha kwambiri kudera la 1m2 mu ola limodzi), Ndi zinthu za carbon zomwe zimakhala ndi matenthedwe apamwamba kwambiri omwe amadziwika ndi anthu.
Zogulitsa za SUNGRAF BRAND
Maonekedwe mtundu Black ufa
Za carbon% > makumi asanu ndi anayi mphambu zisanu ndi zinayi
Chip m'mimba mwake (D50, um) 6-12
Chinyezi% <awiri
Kachulukidwe g / cm3 0.02~0.08
Nthawi yotumiza: May-17-2022