Njengento entsha yekhabhoni esebenzayo, i-Expanded Graphite (EG) iyinto exegayo futhi enezimbotshana efana nezikelemu etholwe ku-graphite flake yemvelo ngokuhlanganisa, ukuwashwa, ukomiswa kanye nokwanda kwezinga lokushisa eliphezulu.I-EG Ngaphezu kwezakhiwo ezinhle kakhulu ze-graphite yemvelo ngokwayo, njengokumelana nokubanda nokushisa, ukumelana nokugqwala kanye nokuzigcoba, ibuye ibe nezici zokuthambile, ukuqina kokucindezela, i-adsorption, ukuhlanganiswa kwemvelo yemvelo, i-biocompatibility kanye nokumelana nemisebe ye-graphite yemvelo. akanayo.Ngasekuqaleni kwawo-1860, u-Brodie wathola i-graphite enwetshiwe ngokufudumeza i-graphite yemvelo ngama-reagents amakhemikhali afana ne-sulfuric acid ne-nitric acid, kodwa ukusetshenziswa kwayo akuzange kuqale kwaze kwaba yiminyaka eyikhulu kamuva.Kusukela lapho, amazwe amaningi ethule ucwaningo nokuthuthukiswa kwe-graphite eyandisiwe, futhi enza impumelelo enkulu yesayensi.
I-graphite enwetshiwe ekushiseni okuphezulu inganweba ngokushesha ivolumu yezikhathi eziyi-150 kuye kwezingama-300, isuka eshidini iye njenge-wormlike, ukuze isakhiwo sikhululeke, sibe nezimbotshana futhi sigobile, indawo engaphezulu ikhulisiwe, amandla angaphezulu ayathuthukiswa, i-adsorption ye-flake graphite ithuthukisiwe, futhi i-graphite efana ne-worm ingaba i-self-mosaic, okwandisa ukuthamba kwayo, ukuqina kwayo kanye nepulasitiki.
I-graphite enwebekayo (EG) iyinhlanganisela ye-graphite interlayer etholakala ku-flake yemvelo ye-graphite nge-chemical oxidation noma i-electrochemical oxidation.Ngokuya ngesakhiwo, i-EG iyinto ehlanganisiwe ye-nanoscale.Lapho i-EG etholwe yi-oxidation ye-H2SO4 evamile ingaphansi kwezinga lokushisa elingaphezu kuka-200 ℃, ukusabela kwe-REDOX kwenzeka phakathi kwama-athomu e-sulfuric acid ne-graphite carbon, kukhiqiza inani elikhulu le-SO2, CO2 kanye nomhwamuko wamanzi, ukuze i-EG iqale ukwanda. , futhi ifinyelela kumthamo wayo omkhulu ku-1 100℃, futhi umthamo wayo wokugcina ungafinyelela izikhathi ezingama-280 weyokuqala.Lesi sakhiwo sivumela i-EG ukucisha ilangabi ngokunyuka kwesikhashana kosayizi uma kwenzeka umlilo.
Indlela ye-EG ebushela amalangabi ingeyendlela yokuvimbela ilangabi yesigaba sokuqiniswa, evimbezela ilangabi ngokubambezela noma ukuphazamisa ukukhiqizwa kwezinto ezivuthayo ezivela ezintweni eziqinile.I-EG Uma ishisa ngezinga elithile, izoqala ukwanda, futhi i-graphite eyandisiwe izoba yisimo se-vermicular enomthamo ophansi kakhulu kusukela esikalini sokuqala, ngaleyo ndlela yakha isendlalelo esihle sokufakelwa.Ishidi le-graphite elinwetshiwe alilona nje umthombo wekhabhoni ohlelweni olwandisiwe, kodwa futhi ungqimba lokufakelwa, olungakwazi ukushisa ukushisa ngokuphumelelayo, ukubambezeleka nokumisa ukubola kwe-polymer;Ngesikhathi esifanayo, ukushisa okukhulu kudonswa ngesikhathi senqubo yokwandisa, okunciphisa izinga lokushisa kwesistimu.Ngaphezu kwalokho, phakathi nenqubo yokwandisa, ama-ion e-asidi ku-interlayer akhululwa ukuze akhuthaze ukuphelelwa amandla kwamanzi kanye ne-carbonization.
I-EG njengesinqamuleli somlilo esivikela imvelo esingenayo i-halogen, izinzuzo zayo yilezi: ezingenabuthi, azikhiqizi amagesi anobuthi futhi agqwalayo lapho kushisa, futhi ikhiqiza igesi encane yomlilo;Inani elingeziwe lincane;Akukho ukuconsa;Ukuvumelana nezimo kwemvelo okuqinile, akukho mkhuba wokufuduka;Ukuzinza kwe-Uv nokuzinza kokukhanya kuhle;Umthombo wanele futhi inqubo yokukhiqiza ilula.Ngakho-ke, i-EG isetshenziswe kabanzi ezintweni ezihlukahlukene zokuvimbela amalangabi nezinto ezingashi umlilo, njengezimpawu zomlilo, amabhodi omlilo, i-fire retardant kanye ne-anti-static coatings, izikhwama zomlilo, izinto ezivimbela umlilo wepulasitiki, indandatho yomlilo kanye namaplastiki abushela umlilo.
Isikhathi sokuthumela: Nov-09-2023