Dab tsi yog PTFE (polytetrafluoroethylene)? Saib: 0 Sau: Tus xaib Editor Tshaj Tawm Lub Sijhawm: 2023-11-10 Keeb Kwm: Lub chaw
Noog
Polytetrafluoroethylene (PTFE) yog cov pa roj carbon thiab fluorine polymer. Cov ntaub ntawv no muaj lub npe paub tshaj plaws: Teflon.
Cov khoom ntawm PTFE suav nrog:
Cov khoom siv zoo heev (<1%)
Tshuaj lom neeg inertness corrosion
Thaum Tshav Kub Kub Ua
Tsawg tshaj coefficients ntawm kev sib txhuam
Tsis Lo Hniav Cov Khoom (withstands txuas ntxiv qhov kub ntawm 500 ° F (260 ° C))
Hnav Tsis kam
Siab melting point
Cov khoom zoo tshaj plaws ntawm PTFE muab nws ntau cov ntawv thov, thiab nws yog feem ntau siv los ua cov txheej uas tsis yog tus pas. PTFE lub ntsej muag zoo dua tso cai rau nws ua ke nrog ntau yam khoom siv hluav taws xob, cov khoom siv ntsuas hluav taws xob ua kom zoo dua qub, cov khoom siv roj carbon monoxide.
Polytetrafluoroethylene tau nrhiav tau nyob rau hauv 1938. Nws yog Ameslikas nrhiav tau pom los ntawm cov neeg muaj pa roj hmab thiab ua yeeb yaj kiab tshiab. Cov neeg nyob rau lub sijhawm yuav tsis muaj kev xav ntawm cov khoom lag luam zoo tib yam. Coj txawv txawv catalysts yuav cuam tshuam txhua yam ntawm lub ntiaj teb.
Xyoo 1941, dupont tau txais patent rau cov khoom no thiab sau npe ib lub cim lag luam nyob rau hauv lub npe 'Teflon ' xyoo 1944.
Tam sim no, Polytetrarafluoroethylene tau siv dav hauv ntau qhov chaw tsim khoom thiab lub neej. Hauv kev lag luam catering, PTFE Coated cookware yog siv dav; Hauv cov khaub ncaws kev lag luam, sab saum kiab khaub ncaws los ntawm cov hom xws li Helikon thiab Carinthia tag nrho siv PTFE raws li txheej lossis txheej sab nraud. , txhawm rau ua tiav lub peev xwm los tiv taus qhov txias heev ntawm -30 ° C; Nyob rau hauv cov tub rog teb, PTFE cov ntaub ntawv nrog cov khoom poob qis, zoo nkauj dielectric zog, thiab yuav luag tsis muaj tshuaj lom neeg siv hauv xov tooj cua siab radar panels. Hauv cov teb kho mob, PTFE cov ntaub ntawv kuj tseem siv tau dav hauv cov khoom cuav ntawm lub cev.
PTFE sawv ntsug rau dab tsi?
PTFE sawv rau polytetrosauruoroethylene, lub sij hawm siv tshuaj rau cov polymer (c2f4) n.
Cov ntaub ntawv no feem ntau yog hais txog txhua tus fluoropolicmer. Cov yam ntxwv tseem ceeb ntawm PolytetrosraTrene yog li hauv qab no:
Qhov siab tshaj plaws ua haujlwm kub (° F / ° C): 500/260
Tensile lub zog ntawm so (PSI): 4,000
Dielectric constant (KV / MIL): 3.7
Zauv: 2.16
Elongation thaum tawg: 350%
Ntug dej D Hardness: 54
Cov khoom siv dav PTFE PolytetraTrene zoo nkauj nrog cov yam ntxwv zoo saum toj no twb tau suav cov cim saum toj no, lub npe tseem ceeb yog raws li hauv qab no:
Polytetrafluoroethylene yog linear polymer muaj cov pa roj carbon monoxide (c)
Cov qauv ntawm PTFE tuaj yeem qhia tau raws li: -CF2-cf2-cf2-cf2-
Cov saw ntev ntawm PTFE molecules yog tsim los ntawm cov roj ntsha atoms, txhua tus uas txuas rau ob lub tshuaj fluorine atoms.
Fluorine atoms yuav luag muab npog saum npoo ntawm cov pa roj carbon atoms ntawm kauv polymer saw. Cov pa roj carbon atoms ua cov saw tseem ceeb ntawm cov saw polymer. Fluorine atoms fluorine fluorine fluorine tsim cov ntaub thaiv npog-nyiam ib puag ncig cov pa roj carbon atoms, uas tau tiv thaiv cov pa roj hauv cov roj ntsha sab hauv.
Qhov kev lees paub no ntawm atoms muab PTFE nws cov khoom tshwj xeeb. Cov qauv molecular no ua rau PTFE lub zog tsis sib xws thiab tshuaj lom neeg.
Dab tsi yog teflon khoom? Teflon yog qhov thermoplastic fluoropicymer, thiab Teflon cov ntawv sau yog PTFE (polytetrafluoroethylene).
Teflon yog lub cim lag luam ntawm chemours, txawm li cas los xij, PTFE tseem tuaj yeem muas tau los ntawm cov tuam txhab tsis yog chemours.
Teflon yog cov khoom siv nrov vim tias nws cov kev sib txhuam qis, kub tsis kam, thiab tshuaj lom neeg kuj.
Tau kawg, Teflon yog cov polymer cov khoom siv polymerized los ntawm Tetrafluoroethylene thiab yog hom ntawm perfluorinated khoom siv. Nws cov tshuaj yog polytetrosraethoroethylene (PTFE).
Teflon cov qauv tshuaj muaj kuab heev. Cov qauv molecular yog f (fluorine atoms) hloov txhua atoms atoms) ntawm C saw. Nyob rau tib lub sijhawm, vim tias lub vojvoog ntawm fluorine atom yog ntau dua li cov roj fluorine atoms, yog li ntawd lub ntiaj teb sab nraud tsuas tuaj yeem tuaj yeem nkag mus rau hauv cov tshuaj tsw qab.
Nrog lub fluorine muaj zog atom Barrier, Teflon polymer qauv yog qhov ruaj khov piv rau lwm cov ntaub ntawv.
PTFE yog polymer polymerized los ntawm Tetrafluoroethylene monomer. Nws yog pob tshab los yog opaque quav ciab zoo ib yam li PE. Nws qhov ntom ntom yog 2.2g / cm3 thiab nws cov dej nqus tus nqi yog tsawg dua 0.01%.
Cov qauv siv tshuaj ntawm PTFE polymer yog ib qho zoo ib yam li PE, tsuas yog tias txhua yam hydrogen atoms hauv polyethylene raug hloov los ntawm cov tshuaj fluorine atoms. Vim yog lub zog ua kom haum zog thiab ua tau ruaj khov ntawm CF txoj kev sib tw, suav nrog cov khoom siv roj ntsha tsis zoo thiab muaj kuab lom, oxidizing media, thiab sodium hydrocide saum 300 ° C. Raws li cov kev cuam tshuam ntawm cov neeg muaj zog oxidants, txo cov neeg sawv cev thiab ntau yam kuab tshuaj orguab.
Cov ftom nyob rau hauv ptfe molecule yog qhov zoo ib yam, thiab ob lub ntsiab hauv CF txoj kev sib khi yog kev sib khi. Tsis muaj neeg siv hluav taws xob dawb hauv cov lwg me me, ua tag nrho cov molecule nruab nrab. Yog li ntawd, nws muaj cov khoom siv daelric zoo heev, thiab nws lub rwb thaiv tsev hluav taws xob tsis cuam tshuam dab tsi los ntawm ib puag ncig thiab zaus.
Nws ntim resistivity yog ntau dua 1017, nws txoj kev poob yog me, nws lub arc tsis kam, thiab nws tuaj yeem ua haujlwm hauv ib puag ncig hluav taws xob ntawm 250 ° C. Vim tias tsis muaj hydrogen bonds nyob rau hauv ptfe molecular qauv, yog li cov crystallical yog 55%, qee zaum ua rau PTFE heev cua sov-resistant. Nws melting kub yog 324C, nws qhov kev txiav txim siab tsis kub yog 415 ° C, thiab nws qhov kev siv kub siab tshaj plaws yog 250 ° C. Nws yog nkig ntsuas kub yog -190 ° C, thiab cua sov distortion kub (nyob rau hauv 0.46mpa tej yam kev mob) yog 120C.
Teflon cov khoom muaj cov khoom siv zoo. Nws lub zog tensile yog 21 ~ 28mpa, kev sib txhuam nws yog 250%, thiab nws zoo li qub (0.04, uas yog qhov zoo dua li Nylon, polyformaldehyde, thiab polyethylene, thiab polyethylene. Lub coefficient ntawm kev sib txhuam ntawm txias plastics yog me me.
Cov ntshiab PTFE muaj lub zog tsawg, hnav tsis kam thiab cov neeg txom nyem tsis kam. Nws yog feem ntau tsim nyog ntxiv ib co inorganic cov lus rau lub PTFE cov pa, disulfide pab pawg, iav olid, carbon fiber, thiab lwm yam. , thiab kuj tseem tuaj yeem sib koom ua ke los ntawm kev koom tes nrog lwm cov polyphenylase (peephenylene
Cov khoom tsim tsim tau siv chloroform li cov khoom siv raw, siv cov tshuaj pleev hydroform, thiab thaum kawg siv thermal tawg los tsim tetrafluoroethylene.
Aokai yog tsim kev siv kev ncua qib polymerization lossis emulsion polymerization.
Kev npaj ntawm Monomer Tetrafuoroethylene
Kev lag luam kev lag luam, chloroform yog siv los ua cov khoom siv raw, cov tshuaj tiv thaiv hydrofluor yog siv los ua cov tshuaj tiv thaiv kev kub siab yog tsim los ua kev kub ntxhov, thiab thaum kawg Tetrafuoroethylene yog tsim los ntawm thermal tawg. Tetrafluoroethylene tseem tuaj yeem tsim los ntawm retacting zinc nrog tetrafluorichhlorohlorohlorohlorohalane ntawm qhov kub.
Kev npaj ntawm polytetrospaethylene
Nyob rau hauv ib tug enamel lossis stainless hlau polymerization Kettle, potiduorocarbon yog siv los ua tus pib siv tshuaj, Tetrafluoroethylene.
Ntxiv ntau yam tshuaj ntxiv rau cov tshuaj tiv thaiv kab mob, thiab Tetrafluoroethylene monomer nkag mus rau hauv cov roj polymerization hauv theem. Kho qhov ntsuas kub nyob rau hauv lub lauj kaub rau 25 ° C, tom qab ntawd ntxiv ib qho kev ua kom zoo (sodium metabisulfite) los pib polymerization los ntawm lub tshuab redox. Thaum lub sij hawm polymerization, cov monomers tau ntxiv, thiab cov polymerization nruj yog tswj hwm ntawm 0.49 ~ 0.78mpa. Lub dispersion tau txais tom qab polymerization yog dilutation rau qee qhov kev xav nrog dej, thiab qhov kub tau hloov kho rau 15 ~ 20ºC. Tom qab kev sib sau ua ke nrog cov tshuab nplawm, nws yog ntxuav nrog dej thiab qhuav, uas yog, cov khoom no tau txais cov khoom nplua nuj.
Puas yog Teflon muaj kev nyab xeeb? Teflon txheej nws tus kheej muaj kev nyab xeeb: Teflon cov khoom nws tus kheej yog tsis-lom, yuav tsis decompose, thiab yuav tsis ua rau muaj kev phom sij rau kev noj qab haus huv. Qhov no yog tej zaum vim tias nws cov qauv molecular yog qhov tseem insoluble hauv cov tshuaj tiag, cia ib leeg zom thiab nqus tau ib leeg lub cev.
Kawm paub ntau ntxiv txog teflon kev nyab xeeb
Cov khoom tshwj xeeb ntawm PTFE ua rau nws dav siv nyob rau hauv kev lag luam thiab cov tub rog ua haujlwm xws li kev lag luam tshuaj lom neeg, cov khoom noj, tshuaj, khoom siv hluav taws xob thiab tshuab.
Daim ntawv thov ntawm polytetrosauruoroethylene (PTFE) hauv kev tiv thaiv corrosion:
Vim yog qhov tsis xws luag hauv corrosion tsis kam ntawm roj hmab, iav, hlau alloys uas muaj kev kub ntxhov, thiab tshuaj lom neeg poob yog qhov ceeb toom heev. Thaum PTFE cov khoom muaj cov khoom siv corrosion zoo heev, polytetrostoroethylene siv lub corrosion corrosion-resistant cov ntaub ntawv hauv roj av, tshuaj, textile thiab lwm yam kev lag luam.
Cov ntawv thov tshwj xeeb suav nrog: kev xa cov khoom xa tuaj, cov kav dej tso tawm rau cov roj corrosive, lub zog kub thiab hluav taws xob txias, kaws kub, cov tub yees duab. Cov kev ua tau zoo ntawm cov khoom siv tshuaj lom neeg xws li cov ntaub li qub thiab li qub yog qhov cuam tshuam zoo rau kev ua haujlwm tau zoo thiab kev ua tau ntawm tag nrho cov tshuab thiab khoom siv. PTFE cov khoom muaj cov yam ntxwv ntawm corrosion tsis kam, kev tiv thaiv kev sib txhuam, tsis muaj qhov sib xyaw ua ke, ntau qhov ntsuas kub thiab txias tshaj plaws 100 °. Xws li cov ntsaws ruaj ruaj rau cov tshuab nqus pa, cov nqaj hluav taws xob, cov hlua cua, cov pob zeb loj, khi cov iav cab, khi cov iav pob, khi hlua khi, thiab lwm yam.
2.Qhov kev sib txhuam tsis tshua muaj kev sib txhuam ntawm polytetrosauruoroethylene (PTFE) yog siv hauv kev siv cov ntawv thov thauj khoom.
Qhov kev sib txhuam ntawm qee cov khoom siv tsis haum rau lubrication, xws li hauv cov khoom siv PTFE yuav tsum tau ua kom cov roj muaj zog rau cov roj av (lossis cov khoom siv hluav taws xob) Qhov no vim tias kev sib txhuam coefficient ntawm cov khoom no yog qhov qis tshaj ntawm cov ntaub ntawv cov khoom siv. Nws cov kev siv tshwj xeeb suav nrog cov kabmob rau cov cuab yeej siv tshuaj lom neeg, tshuab ua liaj ua teb thiab cov yees duab piston, siv cov ntawv qhia tshuab, thiab coj cov nplhaib. Lawv tau dav siv hauv kev tsim kho cov cai lij choj kev tsim kho rau cov choj Cov block, raws li tau siv raws li Choj txhawb nqa thiab choj hloov, thiab lwm yam.
3. Cov npog ntawm polytetrosraTrafluoroethylene (PTFE) hauv cov khoom siv hluav taws xob thiab hluav taws xob.
Qhov xam pom kev poob qis thiab cov khoom siv me me kom haum rau cov ntaub ntawv hluav taws xob, tswj hluav taws xob, ptfe insulating cov ntaub pua chaw, tshuaj paus coojsulating cib, tshuaj paus insulated, motors thiab transsors thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers thiab transformers. Nws tseem yog ib qho ntawm cov ntaub ntawv tsis tseem ceeb rau cov khoom siv hluav taws xob xws li aerospace thiab aerospace. Kev siv fluorine yas zaj duab xis muaj ermeability siab rau oxygen thiab siab permeability rau dej vapor. Qhov kev xaiv no uas muaj kev xaiv ntawm cov ntawv me me tuaj yeem siv tau los tsim cov pa oxygen. Cov yam ntxwv ntawm fluoroplastics uas ua rau kev them nyiaj rau kev sib txawv ntawm kev siv lub microsphones siv tau los tsim lub microphones, cov neeg hais lus, thiab lwm yam kom siv tau. Cov yam ntxwv ntawm kev ua haujlwm siab tuaj yeem ua rau muaj qhov muag roj.
4.Application ntawm polytetrosauruoroethylene (PTFE) hauv tshuaj kho mob.
Cov khoom siv PTFE txuas tau yog cov inert thiab muaj kev hloov kho muaj tseeb heev. Nws yuav tsis lees txais los ntawm lub cev thiab tsis muaj kev mob tshwm sim rau tib neeg lub cev. Nws tuaj yeem ua kom tsis muaj menyuam los ntawm ib txoj kev. Nws cov qauv microporous tso cai rau siv nyob rau hauv ntau cov kev daws teeb meem kev rov kho dua thiab kev phais mob rau cov leeg ntshav thiab kev phais mob rau cov leeg ntshav, plawv thiab orthopedic kev phais.
5.Application ntawm anti-steg cov khoom ntawm polytetrosraethylene (PTFE).
PTFE cov khoom muaj qhov tsawg tshaj plaws nto nro ntawm cov ntaub ntawv cov khoom thiab tsis ua raws li ib yam khoom twg. Nws tseem muaj cov yam ntxwv ntawm cov siab thiab kub tsis kam thiab tshuaj lom inertness, ua rau nws haum rau kev siv xws li kev tsim khoom. Cov lauj kaub uas tsis yog tus pas tau siv dav hauv cov ntawv thov tiv thaiv kab. Cov txheej txheem los tiv thaiv cov txheej txheem tsuas yog suav nrog ob hom: Txhim kho cov ntawv PTFE ntawm cov substrate thiab tso cov PTFE txheej lossis varnish composited nrog iav ntawm lub substrate
Kawm paub ntau ntxiv txog PTFE txheej txheej
Txawm hais tias cov ntaub ntawv PTFE tseem muaj qhov teeb meem ntawm kev nyuaj hauv vuam, nrog kev nce qib ntawm PTFE thiab thov PTFE rau qhov dav ntau ntawm cov teb.
