Polytetrafluoroethylene (PTFE) ndi chinthu chopangidwa mwangozi chakumapeto kwa zaka za m'ma 1930 pamene katswiri wa zamankhwala anali kuyesetsa kupanga mtundu watsopano wa refrigerant wopangidwa ndi perfluorethylene.
Polytetrafluoroethylene (PTFE) ndi chinthu chopangidwa mwangozi chakumapeto kwa zaka za m'ma 1930 pomwe katswiri wa zamankhwala akuyesera kupanga mtundu watsopano wa refrigerant wa perfluorethylene.M'malo mokwaniritsa chlorofluorocarbon, wasayansiyo adadabwa kupeza kuti perfluorethylene yomwe idagwiritsidwa ntchito pochita izi idachita ndi chitsulo chomwe chili m'chidebe chake ndikupangidwa ndi polymer mopanikizika.Pasanathe zaka khumi, zinthu zatsopanozi zinali kugawidwa pamalonda ndipo pamapeto pake zidapatsidwa chilolezo chotchedwa polymer®.Zingatenge zaka zina 20 izi zisanachitike poto yokazinga ndikudziwikiratu ngati zokutira zopanda ndodo zophikira, komabe.M'malo mwake, zinthuzi zidagwiritsidwa ntchito pazinthu zosiyanasiyana poyamba.
Panthawi ya Nkhondo Yachiwiri Yapadziko Lonse, PTFE idagwiritsidwa ntchito kuletsa kuthawa kwa zida zotulutsa ma radio pamalo opangira bomba loyamba la atomiki ku US, cholinga chomwe chimatchedwa Manhattan Project.Malowa adayimira malo owoneka bwino okhala ndi masikweya mita 2,000,000 (609,600 sq. metres) momwe mungakhalire uranium hexafluoride.Sikuti chinthuchi chimakhala chapoizoni kwambiri komanso chowononga chokha, komanso chimapanga mpweya wowopsa womwe umadziwika kuti hydrogen fluoride pamaso pa madzi kapena nthunzi yamadzi.Pazifukwa izi, PTFE idagwiritsidwa ntchito ngati zokutira zapaipi kuti ziwapangitse kutayikira umboni.
Zapadera zoteteza zinthu zamtunduwu zidapangitsa kuti kugwiritsidwa ntchito kwake muzinthu zamagetsi kukhala koyenera.Chifukwa chimodzi, si conductive, zomwe zimapangitsa kuti zisagwirizane ndi malo okwera magetsi.Komanso imalimbana kwambiri ndi madzi, kutentha, ndi dzimbiri.M'malo mwake, ikupitilizabe kugwiritsidwa ntchito kupanga zida za labotale ndi zowonjezera zomwe zimakumana ndi hydrofluoric acid, zomwe zingasungunule zida zina, ngakhale magalasi.
PTFE imakhalanso ndi katundu wochepa kwambiri, womwe umawonetsedwa ngati frictional coefficient.Muyezo uwu ndi wocheperako ndipo umasiyana malinga ndi zida zomwe zimalumikizidwa kuti zipangitse kapena kuyerekezera mikangano.Pankhani ya mapulasitiki, kukangana kumawonedwa motsutsana ndi chitsulo chopukutidwa.Kuti PTFE ikhale yocheperako, ndi chinthu chokhacho chodziwika bwino chapamwamba chomwe zala za nalimata zimalephera kumamatira.Khalidweli limapangitsa kuti likhale loyenera kupanga zida zomwe zimafunikira kukana kukangana, monga magiya ndi mayendedwe a mpira.
Izi pamapeto pake zidadziwitsidwa kwa mabanja aku America ndi Marion Trozzolo, woyambitsa Laboratory Plasticware Fabricators.Ngakhale kuti Trozzolo wakhala akupanga zida za sayansi zokhala ndi polymer® kwa zaka zingapo, adalimbikitsidwa ndi injiniya wina wa ku France yemwe adapeza kuti ndizovala zopanda ndodo za zida zake zophera nsomba zomwe pambuyo pake adachitira nazo miphika ndi mapoto a mkazi wake.Ngakhale kuti kuyesaku kunayambitsa kupanga zophikira zomwe zimadziwika kuti Tefal (T-Fal®) ku France pakati pa zaka za m'ma 1950, Trozzolo anakhala woyamba ku US kupanga zophika zophika polima®.M'malo mwake, "The Happy Pan," yomwe idakhazikitsidwa mu 1961, idapeza malo ofunikira mbiri yakale ku Smithsonian Institute ndi Trozzolo dzina lodziwika bwino mu Plastics Hall of Fame.
Nthawi yotumiza: Sep-01-2020