Zinthu zowonjezera za graphite ndi zoletsa moto

Monga zinthu zatsopano zogwirira ntchito za kaboni, Expanded Graphite (EG) ndi chinthu chotayirira komanso chowoneka ngati nyongolotsi chotengedwa kuchokera ku flake yachilengedwe ya graphite polumikizana, kuchapa, kuyanika ndi kukulitsa kutentha.EG Kuphatikiza pa zinthu zabwino kwambiri za graphite yachilengedwe yokha, monga kukana kuzizira ndi kutentha, kukana kwa dzimbiri ndi kudzipaka mafuta, ilinso ndi mawonekedwe a kufewa, kulimba mtima, kutsatsa, kugwirizanitsa chilengedwe, biocompatibility ndi kukana ma radiation kuti graphite yachilengedwe. alibe.Kumayambiriro kwa zaka za m'ma 1860, Brodie anapeza graphite yowonjezera powotcha graphite yachilengedwe ndi mankhwala opangira mankhwala monga sulfuric acid ndi nitric acid, koma kugwiritsa ntchito kwake sikunayambe mpaka zaka zana pambuyo pake.Kuyambira nthawi imeneyo, mayiko ambiri adayambitsa kafukufuku ndi chitukuko cha graphite yowonjezera, ndipo apanga zopambana zazikulu za sayansi.

Kuwonjezedwa kwa graphite pa kutentha kwakukulu kumatha kukulitsa nthawi yomweyo kuchuluka kwa nthawi 150 mpaka 300, kuchokera papepala kupita ku nyongolotsi, kotero kuti mawonekedwewo ndi otayirira, opindika komanso opindika, kumtunda kumakulitsidwa, mphamvu yakumtunda imakula bwino, kukopa kwa graphite ya flake ndi kuwonjezeredwa, ndipo graphite yonga nyongolotsi imatha kukhala yodzipangira yokha, yomwe imawonjezera kufewa kwake, kulimba kwake komanso pulasitiki.

Expandable graphite (EG) ndi graphite interlayer compound yotengedwa kuchokera ku flake flake graphite ndi mankhwala oxidation kapena electrochemical oxidation.Pankhani yamapangidwe, EG ndi nanoscale composite material.Pamene EG analandira ndi makutidwe ndi okosijeni wa H2SO4 wamba ndi pansi kutentha pamwamba 200 ℃, ndi REDOX anachita kumachitika pakati sulfuric asidi ndi graphite maatomu mpweya, kutulutsa kuchuluka kwa SO2, CO2 ndi nthunzi madzi, kuti EG akuyamba kukulitsa. , ndipo imafika pa voliyumu yake yayikulu pa 1 100 ℃, ndipo voliyumu yake yomaliza imatha kufika nthawi za 280 zoyambira.Katunduyu amalola EG kuzimitsa lawi lamoto ndikuwonjeza kwakanthawi kukula pakayaka moto.

Makina oletsa moto a EG ndi a gawo lotsekereza lawilo, lomwe limatsekereza lawi pochedwetsa kapena kusokoneza kupanga zinthu zoyaka kuchokera kuzinthu zolimba.EG Ikatenthedwa kumlingo wina, imayamba kukula, ndipo graphite yowonjezereka idzakhala mawonekedwe a vermicular okhala ndi kachulukidwe kakang'ono kwambiri kuchokera pamlingo wapachiyambi, motero amapanga wosanjikiza wabwino.The kukodzedwa graphite pepala si gwero mpweya mu kukodzedwa dongosolo, komanso kutchinjiriza wosanjikiza, amene angathe mogwira kutentha kutchinjiriza, kuchedwa ndi kusiya kuwonongeka kwa polima;Panthawi imodzimodziyo, kutentha kwakukulu kumatengedwa panthawi yowonjezera, zomwe zimachepetsa kutentha kwa dongosolo.Kuonjezera apo, panthawi yowonjezera, ma ions a asidi mu interlayer amamasulidwa kuti apititse patsogolo kutaya madzi m'thupi ndi carbonization.

EG monga halogen-free chilengedwe chitetezo retardant lawi, ubwino wake ndi: sanali poizoni, samapanga mpweya wakupha ndi zowononga pamene watenthedwa, ndipo imatulutsa mpweya wochepa;Kuchulukitsa kowonjezerako ndi kochepa;Palibe kudontha;Kusinthasintha kwamphamvu kwachilengedwe, palibe chodabwitsa cha kusamuka;Kukhazikika kwa UV ndi kukhazikika kwa kuwala ndizabwino;Gwero ndilokwanira ndipo njira yopangira ndi yosavuta.Choncho, EG yakhala ikugwiritsidwa ntchito kwambiri pazinthu zosiyanasiyana zoyaka moto komanso zowotcha moto, monga zisindikizo zamoto, matabwa amoto, zotchingira moto komanso zotetezera, zikwama zamoto, zotchinga moto za pulasitiki, mphete yoyaka moto ndi mapulasitiki oletsa moto.