Politetrafluoroéthylène (PTFE) ye polimɛri ye min bɛ kɛ ni karɔbɔni ni fluorine ye. Nin fɛn in tɔgɔ min bɛ dɔn kosɛbɛ: Teflon.
PTFE ka nafaw ye ninnu ye:
Masina baarakɛcogo ɲumanba (<1%) .
Chemique inerteness ka sɔgɔsɔgɔninjɛ
Funteni kunbɛnni
Coefficients de friction minnu ka dɔgɔn kosɛbɛ
Non stick properties(a bɛ se ka funteni caman kunbɛn ka taa a fɛ 500°f (260°c))
Aw bɛ a yɛrɛ minɛ ka a kɛlɛ
A wulicogo ka bon
PTFE ka jogo ɲumanw b’a to a bɛ baara kɛ cogo caman na, wa a ka teli ka kɛ tobilikɛminɛnw dacogo ye min tɛ nɔrɔ. PTFE ka sɛgɛnbaliya ka fisa, o b’a to a bɛ se ka fara ɲɔgɔn kan ni fɛn suguya caman ye emulsiɔn polimerizasiyɔn walima suspension polimerizasiyɔn baarakɛcogo fɛ walasa ka izini fɛnw dilan minnu bɛ se ka funteni kɛlɛ kosɛbɛ, ni masinko ɲuman ye, i n’a fɔ nɛgɛw, dumunifɛnw tacogo, finiw minnu tɛ nɔrɔ, a ɲɔgɔnnaw.
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Politetrafluoroethylene sɔrɔla san 1938. A sɔrɔla fɔlɔ Ameriki kemikɛla Roy J. Plunkett fɛ (1910–1994) tuma min na a tun b’a ɲini ka nɛnɛfɛn kura dilan min bɛ kɛ ni karɔbɔni ni fluorine ye. O waati la, mɔgɔw tun tɛna miiri nin fɛn gansan in na. Katalisita kabakomaw bɛna nɔ bila diɲɛ fan bɛɛ la.
San 1941, DuPont ye patenti sɔrɔ o fɛn in na, ka jagokɛyɔrɔ dɔ sɛbɛn ni tɔgɔ ye ko 'Teflon' san 1944.
Bi bi in na, politetarafluoroetilɛni kɛra baara ye kosɛbɛ fɛn dilanni ni ɲɛnamaya sira caman na. Dumunikɛyɔrɔ la, tobilikɛminɛn minnu dilannen don ni PTFE ye, olu bɛ kɛ kosɛbɛ; finiko la, sanfɛla nɛnɛ tɛ fini minnu na ka bɔ fɛn dilannikɛlaw la i n’a fɔ HELIKON ani Carinthia, olu bɛɛ bɛ PTFE kɛ finimugu walima kɛnɛma fini ye. , walasa ka se ka nɛnɛba muɲu min bɛ se -30°C ma ; sɔrɔdasi siratigɛ la, PTFE fɛnw minnu bɔnɛ ka dɔgɔn, minnu ka dielektriki ka ɲi kosɛbɛ, minnu bɛ bɛn ɲɔgɔn ma kosɛbɛ, minnu ka kemikoro sabatilen don, ani minnu bɛ se ka kɛ ko ji min tɛ ji minɛ, olu bɛ baara kɛ kosɛbɛ arajo rada panɛriw kɔnɔ minnu ka bon. Furakɛcogo la, PTFE fɛnw fana bɛ kɛ kosɛbɛ farikolo yɔrɔ dilannenw na.
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PTFE kɔrɔ ye politetrafluoroethylene ye, o ye kemikɛli daɲɛ ye min bɛ fɔ polimɛri (C2F4)n ma.
Nin fɛn in bɛ tali kɛ caman na ptfe sintetiki fluoropolimɛri suguya o suguya la. Politetrafluoroethylene ka jogo kunbabaw ye ninnu ye:
Baarakɛyɔrɔ funteni hakɛ min ka bon (°F /°C): 500/260
Tensile Strength at Break (PSI): 4000. Bamako, Mali
Dielektriki sabatili (kV/mil): 3,7
A hakɛ: 2,16
Janya waati lafiɲɛbɔ waati: 350% .
Kɔgɔjida D Gɛlɛya: 54
Fluoropolimɛri sintetiki ptfe politetrafluoroéthylène min bɛ baara kɛ kosɛbɛ ni sanfɛla jogo ninnu bɛ a la kaban, a suguya jatebaliya bɛ a la kaban, a suguya kunbabaw ye ninnu ye:
TEFLON®: Kimiyɔmuw
FLUON®: AGC Ltd ye baara kɛ ni a ye
DYNEON®: 3M. Bamako, Mali
POLYFLON: Daikin Industri Co., Ltd. ye baara kɛ ni a ye.
ALGOFLON: Solvay Ltd. ye baara kɛ ni a ye.
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Politetrafluoroethylene ye polimɛri ye min bɛ kɛ ni karɔbɔni (C) ni fluorine (F) atomu ye, a ka kemikaliya formula (C2F4)n, n ye monomɛri unit hakɛ ye.
PTFE sigicogo bɛ se ka fɔ nin cogo la: -CF2-CF2-CF2-CF2- .
PTFE mɔlikuluw ka cakɛda jan bɛ kɛ ni karɔbɔni atomu ye, minnu kelen-kelen bɛɛ sirilen bɛ fluorine atomu fila la.
Fluorine atomuw bɛ ɲini ka cakɛda polimɛri spiral ka karɔbɔni atomuw sanfɛla datugu. Kabɔn atomuw bɛ kɛ polimɛri cakɛda cakɛda kunba ye. Fluorine atomuw bɛ kɛ fɛn ye min bɛ i n’a fɔ kala kabɔri atomuw lamini, o min bɛ karɔbɔni atomu kɔnɔna lakana kosɛbɛ.
O atomiw labɛncogo kɛrɛnkɛrɛnnen in b’a ka jogo kɛrɛnkɛrɛnnenw Di PTFE ma. O molekiyɔmu jɔcogo in bɛ kɛ sababu ye ka PTFE ka farikolo ni a ka kemikaliya cogoyaw sɔrɔ minnu ɲɔgɔn tɛ.
Teflon ye fluoropolimère thermoplastique ye, ani Teflon daɲɛ surun ye PTFE (polytetrafluoroethylene) ye.
Teflon ye Chemours ka jagokɛyɔrɔ taamasiyɛn ye, nka, PTFE bɛ se ka san fana baarakɛda wɛrɛw fɛ minnu tɛ Chemours ye.
Teflon ye fɛn ye min ka di kosɛbɛ k’a sababu kɛ a ka sɔgɔsɔgɔninjɛ dɔgɔyali ye, a ka funteni ka bon, ani a ka se ka kemikɛli kɛ.
Tiɲɛ don, Teflon ye polimɛri fɛn ye min bɛ polimɛri kɛ ni tetarafluoroetilɛni ye, wa a ye fɛn sugu dɔ ye min bɛ kɛ ni perfluorine ye. A tɔgɔ kemikali ye politetrafluoroéthylène (PTFE) ye.
Teflon kemikaliya jɔcogo ye fɛn ye min ɲɔgɔn tɛ yen kosɛbɛ. Molecules (molecules) jɔcogo ye ko F (fluorine atomes) bɛ H (hydrogène atomes) bɛɛ bila C cakɛda kan. O waati kelen na, bawo fluorine atomu ka radiyali ka bon kosɛbɛ ka tɛmɛ carbon atom radius kan, o la, atomiw ni ɲɔgɔn cɛ gɛnni ka bon kosɛbɛ, o la a tɛna kɛ I n’a fɔ idɔrɔzi atomu, u bɛ se ka labɛn plan kɔnɔ, o la, fluorine atomu bɛ ɲini ka wuli ka kabɔn atomuw siri, walasa kɛnɛma diɲɛ bɛ se ka ɲɔgɔn sɔrɔ dɔrɔn ni fluorine atomu ye minnu tɛ baara kɛ kosɛbɛ.
Ni fluorine atomu barika barikama bɛ a la, Teflon polimɛri jɔcogo bɛ sabati kosɛbɛ ni i y’a suma ni fɛn wɛrɛw ye.
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PTFE ye polimɛri ye min bɛ polimɛri kɛ ka bɔ tetarafluoroetilɛni monomɛri la. O ye sizo ye min bɛ ye walima min tɛ ye, a ni PE bɛ tali kɛ ɲɔgɔn na. A hakɛ ye 2,2g/cm3 ye wa a ji minta hakɛ tɛ 0,01% bɔ.
PTFE polimɛri ka kemikaliya cogoya ni PE ta bɔlen don, fo ni poliyetilɛni kɔnɔ hidrɔzɛni atomu bɛɛ bɛ bila fluorine atomu nɔ na. K’a sababu kɛ CF jɛɲɔgɔnya ka jɛɲɔgɔnya fanga ka bon ani a ka baarakɛcogo sabatilen ye, a bɛ se ka sɔgɔsɔgɔninjɛ kɛlɛ kosɛbɛ kemikɛli fɛ, wa a bɛ se ka asidi barikama bɛɛ muɲu (aqua regia fana sen bɛ o la) fo n’a ma fɔ nɛgɛ alkali wulilenw, oksidanw, ani idɔrɔkisidi sodiyɔmu minnu ka ca ni 300°C ye. Ka fara oksidan barikamaw nɔ kan, fɛn minnu bɛ fɛnw dɔgɔya ani fɛnɲɛnɛma suguya caman.
F atomu min bɛ PTFE molekiyɔrɔ la, o ye simetri ye, wa CF jɛɲɔgɔnya kɔnɔfɛn fila bɛ ɲɔgɔn na ni kovalɛn ye. Elektɔron hɔrɔnw tɛ molekiyɔmu kɔnɔ, o b’a to mɔlikulu bɛɛ bɛ kɛ fɛn ye min tɛ fɛn wɛrɛ ye. O la, a bɛ ni dielektriki jogo ɲumanw ye, wa a kuran insulation tɛ nɔ bila The influence of environment and frequency.
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A ka fɔcogo ka ca ni 1017 ye, a ka dielektriki bɔnɛ ka dɔgɔn, a ka tiɲɛni wulicogo ka bon, a ka arc resistance ka ɲi, wa a bɛ se ka baara kɛ kuran sigida la min ye 250°C ye. Ikomi hidrɔzɛni jɛɲɔgɔnya tɛ PTFE molekiyɔmu jɔcogo la, a jɔcogo ye simetri ye, o la a ka kristali Kristaliya hakɛ ka bon kosɛbɛ (a ka c’a la, kristali ye 55%~75% ye, tuma dɔw la, a bɛ se 94%) ma, o min b’a to PTFE bɛ se ka funteni kɛlɛ kosɛbɛ. A wulicogo funteni ye 324C ye, a toli funteni ye 415°C ye, a baarakɛcogo funteni hakɛ cayalenba ye 250°C ye. A bɛ kari A funteni ye -190°C ye, ani funteni jiginni funteni (0,46MPa cogoyaw la) ye 120C ye.
Teflon fɛn bɛ ni masinko ɲuman ye. A ka sɔgɔli fanga ye 21~28MPa ye, a kɔrɔta fanga ye 11~14MPa ye, a janya ye 250%~300% ye, wa a ka sɔgɔsɔgɔninjɛ fanga ni a jɔlen ye nɛgɛ kan, o fila bɛɛ ye 0,04 ye, o min ka fisa ni nilon, polifɔrmaldehidi, ani poliyetilɛni ye. Plastiki nɛnɛmanw ka ɲɔgɔnkanu coefficient (coefficient de friction) ka dɔgɔn.
PTFE saniyalen fanga ka dɔgɔn, a tɛ sɛgɛn ani a tɛ se ka sɔgɔsɔgɔ kosɛbɛ. A ka c’a la, a ka kan ka fɛnɲɛnamafagalan dɔw fara PTFE polimɛri kan, i n’a fɔ grafite, disulfide kulu, aluminiyɔmu ɔkisidi, gilasi fibre, carbone fibre, a ɲɔgɔnnaw walasa k’a ka masinko kɛcogo ɲɛ. , wa a bɛ se ka bonya fana ni jɛkafɔ ye ni polimɛri wɛrɛw ye i n’a fɔ polifenilazi (PHB), polifenilɛni sulfide (PFS), polietilɛni gilikɔli (PEEK), poliyetilɛni/poropilini kopolimɛri (PFEP), a ɲɔgɔnnaw a ka jisuma hakɛ dantɛmɛnen, o bɛ a ka se ka fɛn caman sɛgɛsɛgɛli kɛcogo ɲɛ.
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A dilanni taabolo bɛ kɛ ni kulorofɔrimu ye i n’a fɔ fɛn fɔlɔ, ka asidi fluorique jilama kɛ ka kulorofɔrimu fluorize, a kɛcogo funteni bɛ tɛmɛ 65oC kan, a bɛ kɛ ni antimoni pentachloride ye i n’a fɔ fɛn min bɛ kɛ ka fɛnw kɛ, ka laban ka baara kɛ ni funteni kari ye walasa ka tetarafluoroéthylène dilan.
Aokai bɛ dilan ni polimɛrizi ye min bɛ kɛ ni suspension ye walima ni polimɛrizi ye min bɛ kɛ ni emulsiɔn ye.
Tetarafluoroéthylène monomɛri labɛnni
Sɛnɛko siratigɛ la, kulorofɔrimu bɛ kɛ fɛnɲɛnamafagalan ye, asidi fluorique jilama bɛ kɛ ka kulorofɔrimu fluorize, a kɛcogo funteni bɛ tɛmɛ 65oC kan, antimoni pentachloride bɛ kɛ katalisita ye, ani laban na, tetarafluoroéthylène bɛ dilan ni funteni karilen ye. Tetarafluoroéthylène fana bɛ se ka sɔrɔ ni zinki ni tetarafluorodichloroéthane kɛra ɲɔgɔn fɛ funteni caman na.
Politetrafluoroéthylène labɛnni
Enamel walima nɛgɛ inox polimerizasiyɔn kɛli kɔnɔ, ji bɛ kɛ fɛnɲɛnamafagalan ye, potasiyɔmu persulfate bɛ kɛ a daminɛfɛn ye, asidi perfluorocarboxylic amoniyɔmu kɔgɔ bɛ kɛ fɛn ye min bɛ se ka jɛnsɛn, fluorocarbone bɛ kɛ a sabatilikɛlan ye, ani tetarafluoroéthylène bɛ kɛ redox polimerize ye walasa ka poliyetilɛni mugu finman sɔrɔ. Tetarafluoroetilɛni (Tetrafluoroéthylène) ye.
Aw bɛ faralifɛn suguya caman fara farikolojidɛsɛ furakisɛ kan, o la tetarafluoroetilɛni monomɛri bɛ don polimerizasiyɔn daga kɔnɔ gazi fasa kɔnɔ. Aw bɛ funteni hakɛ ladilan jisuma na fo ka se 25°C ma, o kɔ aw bɛ activateur (métabisulfite de sodium) hakɛ dɔ fara a kan walasa ka polimerizasiyɔn daminɛ ni redox system ye. Polimerizasiyɔn kɛcogo la, monomɛriw bɛ fara a kan tuma bɛɛ, wa polimɛrizi tansiyɔn bɛ to 0,49~0,78MPa la. Dispersion min bɛ sɔrɔ polimɛrizi kɔfɛ, o bɛ wuli fo ka se hakɛ dɔ ma ni ji ye, ka sɔrɔ ka funteni ladilan ka se 15~20oC ma. A faralen kɔ ni masin ye, a bɛ ko ni ji ye ka ja, o kɔrɔ ye ko Nin fɛn in bɛ sɔrɔ i n’a fɔ resin granulaire fine.
Yala Teflon tɛ mɔgɔ tɔɔrɔ wa?
Teflon dacogo yɛrɛ farati tɛ: Teflon fɛn yɛrɛ tɛ baga ye, a tɛna toli, wa a tɛna farati lase kɛnɛya ma. N’a sɔrɔla o bɛ Kɛ k’a sababu Kɛ a molekiyɔmuw jɔcogo jɔnjɔn tɛ Se ka Dòn kemikɛlifɛn lakikaw la, a kana fɔ ko a bɛ Dòn hadamaden farikolo la k’a Minɛ.
Aw ye kunnafoni wɛrɛw sɔrɔ Teflon lakanani kan
PTFE bɛ baara kɛ ni mun ye?
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PTFE ka jogo kɛrɛnkɛrɛnnenw b’a to a bɛ baara kɛ kosɛbɛ izini ni kɔgɔji baara la i n’a fɔ kemikɛli, petoroli, finiko, dumuni, papiye dilanni, furakɛli, ɛntɛrinɛti ani masinw.
Politetrafluoroéthylène (PTFE) kɛli sɔgɔli kɛlɛli fɛɛrɛw la:
K’a sababu kɛ lastikuw, gilasi, nɛgɛdaga ani fɛn wɛrɛw ka sɔgɔlibaliya ye, a ka gɛlɛn ka sigida gɛlɛn kunbɛn, funteni, tansiyɔn ani kemikɛlifɛnw bɛ ɲɔgɔn fɛ yɔrɔ min na, wa bɔnɛ minnu bɛ sɔrɔ o la, olu bɛ mɔgɔ jalaki kosɛbɛ. Hali ni PTFE fɛn bɛ se ka sɔgɔsɔgɔ kosɛbɛ, politetrafluoroethylene bɛ baara kɛ ni fɛnba ye minnu bɛ se ka sɔgɔ petoroli, kemikɛli, finiko ani izini wɛrɛw la.
Baara kɛrɛnkɛrɛnnenw ye : fɛnw lase pipew, fɛnɲɛnamafagalanw, watara pipe minnu bɛ gazi sɔgɔlenw ta, tulu pipe minnu bɛ tansiyɔnba la, minnu bɛ kɛ ka wuli-wuli-minɛnw, tansiyɔnba, cɛmancɛ ani dɔgɔman pipe minnu bɛ kɛ awiyɔnw ka ji-sɛnɛfɛnw na ani presse nɛnɛmaw, distillation towers, funteni-falen-falen-minɛnw, kettles, sankansow ani tankiw. Kemikɛli minɛnw sigilanw baarakɛcogo i n’a fɔ finimuguw ni u dawolo, o bɛ nɔba bila masin ni minɛnw bɛɛ ka baarakɛcogo ɲuman n’u ka baarakɛcogo la. PTFE fɛn dilannen bɛ ni fɛnw ye minnu bɛ se ka sɔgɔsɔgɔ, ka kɔrɔya, ka sɔgɔsɔgɔninjɛ hakɛ dɔgɔya ani ka nɔrɔ ɲɔgɔn na, ka funteni hakɛ caya, ani ka sɔgɔli ɲuman kɛ, o b’a to a bɛnnen don kosɛbɛ sigilanw dilanni na minnu ka sɔgɔli kunbɛnni wajibiyalenw ka bon ani minnu ka baara funteni bɛ tɛmɛ 100° kan. I n’a fɔ masinw ka flansɛw sigilanw, funteni-falen-falen-minɛnw, tansiyɔnba-minɛnw, minɛnw cɛmancɛba, bɔgɔlanw, ani pɔnpew, sigilanw minnu bɛ kɛ galasi-wale-minɛnw na, flansɛ fla, flansɛw cɛmancɛba, jirisunw, piston berew, bɔlɔnw, Worm gear pɔnpew, tie rod sigilanw, a ɲɔgɔnnaw.
2.Politetrafluoroethylene (PTFE) ka sɔgɔsɔgɔninjɛ baarakɛcogo dɔgɔman bɛ kɛ doni tali la.
Minɛn dɔw ka sɔgɔsɔgɔninjɛ yɔrɔw tɛ bɛn tulumafɛnw ma, i n’a fɔ ko minnu na tulumafɛnw bɛna wuli ni furajiw ye, ka kɛ nafama ye, walima papiyew dilanni na, furaw dilanni na, dumuniw dilanni na, finiw dilanni na, a ɲɔgɔnnaw bearing) ka masinw ka minɛnw yɔrɔw. O bɛ Kɛ k’a sababu Kɛ o fɛn in ka sɔgɔsɔgɔninjɛ hakɛ ka dɔgɔn fɛn gɛlɛn dɔntaw la. A baara Kɛrɛnkɛrɛnnenw ye birikiw ye kemikɛli minɛnw kama, papiye dilanni masinw, ani sɛnɛ masinw, i n’a fɔ pisini bololanɛgɛw, masinw baarakɛminɛnw ɲɛminɛlanw, ani ɲɛminɛlanw. U bɛ kɛ kosɛbɛ siwili jɔli porozɛw la i n’a fɔ dɛmɛnanw ka ɲɛsin bɔrɔw ma, tunɛri nɛgɛ jɔli so sanfɛlanw, kemikɛli pibiliki belebelebaw, ani fɛn marayɔrɔw. Blokiw, ka fara u kan i n’a fɔ bridge supports ani bridge swivels, wdfl.
3.Politetrafluoroéthylène (PTFE) kɛcogo ɛntɛrinɛti ni kuran baarakɛcogo la.
PTFE fɛnw ka bɔnɛ dɔgɔyalen ni dielektriki sabatili fitinin min bɛ sɔrɔ a kɔnɔ, o b’a to a bɛ se ka kɛ filiw ye minnu bɛ kɛ ni enamelé ye walasa ka baara kɛ ni mikro motɛriw ye, thermocouples, control devices, a ɲɔgɔnnaw, PTFE kuran insulasi filimu A ye insulating material ɲuman ye min bɛ kɛ ka condensateurs, radio insulateurs liners, insulations cables, moteurs ani transformateurs dilan. O fana ye fɛn nafama dɔ ye izini ɛntɛrinɛti yɔrɔw la i n’a fɔ sanfɛla ni sanfɛla. Fluorine plastiki filimuw tali bɛ se ka oksizɛni don kosɛbɛ ani ka ji labɔ kosɛbɛ. O permeabilité sugandilen in min ye permeability misɛnninw ye, o bɛ se ka kɛ ka oksizɛni sensɛriw dilan. Fluoroplastic (fluoroplastic) jogo minnu bɛ kɛ sababu ye ka charge polar deviation (sara) polari (polar charge deviation) kɛ funteni caman na ani tansiyɔnba kɔnɔ, olu bɛ se ka kɛ ka mikrow, kumakanfɔlanw, yɔrɔw dilan robow kan, a ɲɔgɔnnaw, wa u ka refraction dɔgɔyalen bɛ se ka kɛ. Nafa caman kɛcogo bɛ se ka fibre optique dilan.
4.Politétrafluoroéthylène (PTFE) tali furakɛli la.
PTFE fɛn min bonyalen don, o ye fɛn ye min tɛ se ka kɛ dɔrɔn, wa a bɛ se ka ladamu biologiki la kosɛbɛ. A tɛna kɛ sababu ye farikolo ka ban ani a tɛ farikolo kɔlɔlɔ si lase hadamaden farikolo ma. A bɛ se ka sterilize ni fɛɛrɛ o fɛɛrɛ ye. A ka mikoroporozɛni cogoya bɛ a to a bɛ se ka kɛ furakɛli fura suguya caman na, i n’a fɔ joli sira dilannenw ni yɔrɔw minnu bɛ kɛ ka farikolo yɔrɔ nɔgɔlenw labɛn kokura ani opereli sirili minnu bɛ kɛ ka jolilabanaw, dusukun, bɛɛjɛfanga ani kolotugudaw opereli kɛ.
5.Politetrafluoroéthylène (PTFE) ka sɔgɔsɔgɔninjɛ furaw tali.
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Hali ni PTFE fɛnw bɛ gɛlɛyaba la hali bi solda la, ni fɛɛrɛ kuraw bɛ ka taa ɲɛ, sintezi fɛɛrɛ kura bɛna PTFE dimi yɔrɔw ɲɛnabɔ sɔɔni ani ka PTFE kɛ foro caman na.
