Nyati sia ƒo nu tso mɔnukpɔkpɔ siwo ate ŋu asu Teflon avɔ si me dzoxɔxɔ le ŋutɔ zazã me le batri ƒe dɔwɔƒe si le dodom le nɔnɔme sesẽwo me ŋu. Nuto ene: Dry electrode/electrolyte membrane manufacturing — dzoxɔxɔ gã anti-stick conveyor belts na dzodzoe agbalẽ xatsaxatsa tete (150-250°C) si wɔnɛ be woate ŋu atsɔ film siwo léa wo ɖokui ɖe te ƒe ʋuʋu nyuie; dzodzoe roller nutsyɔnu ƒuƒoƒo abe afã-mavɔ anti-ati ƒuƒoƒo; ekpɔa egbɔ be film ƒe anyigba le gbadzaa, eɖea nusiwo gblẽ dzi kpɔtɔna, enaa nuku ƒe ŋeŋe nyona ɖe edzi. Ðe asi le liners kple cushioning pads na dzoxɔxɔ-tete densification — sulfide / polymer batriwo hiã dzoxɔxɔ isostatic / gbadzaa tete (100-300°C, MPa ewo); PTFE avɔ si woda ɖe batri ƒe ƒuƒoƒo kple aŋɔ dome xea mɔ na adhesion, enaa nyaƒoɖeamenu mama ɖekae to micro-elasticity dzi, kpɔa dzoxɔxɔ ƒe agbalẽviwo ta.

Nyati sia dzro tɔtrɔ siwo vaa PTFE molecule kɔsɔkɔsɔwo me le ultraviolet keklẽŋusẽ te me. Main-chain scission kple molecule ƒe kpekpeme dzi ɖeɖe kpɔtɔ: UV (254nm, 471 kJ/mol) gblẽa CC kadodowo (347 kJ/mol), si hea homolysis vɛ, si wɔnɛ be CF2-terminated free radicals, molecule ƒe kpekpeme ƒe ɖiɖi sesĩe, sesẽme kple didime ƒe bu. Free radical reaction pathways: le oxygen me la, peroxy radicals dzɔna, wogbugbɔ ɖoa ​​wo ɖe acyl fluoride (—COF) kple carboxylic acid (—COOH) ƒe nuwuwu ƒuƒoƒowo me, eye woɖea COF2 kple CO2 (COF2 tsia tsi me zua HF); le yamenutome siwo mewɔa dɔ o me la, masɔmasɔ/gbugbɔgaƒoƒo xɔa aƒe ɖe eme, gake kɔsɔkɔsɔ ƒe ʋuʋu gakpɔtɔ xɔ aƒe ɖe eme.

Nyati sia ƒo nu tso Teflon avɔ si me dzoxɔxɔ le ŋutɔ zazã le yamenutomewu ƒe dzoxɔxɔnutsitikewo me ŋu. Nusiwo wotsɔ wɔe ƒe vevienyenye: avɔ si wotsɔ fiberglass si ŋu wofa PTFE ɖo, si woyɔna le yamenutome be Beta avɔ, si tsɔ avɔa ƒe asitɔtrɔ le nɔnɔmewo ŋu kple PTFE ƒe nutome ƒe dɔmawɔmawɔ nyuie si gbɔ eme tsaka. Akpa si wòwɔna: Thermal Micrometeoroid Garment (TMG) ƒe gotagome ƒuƒoƒo le extravehicular mobility units me, si dze ŋgɔ vacuum tẽ, dzoxɔxɔ ƒe vovototo siwo gbɔ eme, kple micrometeoroids abe dzɔdzɔme/dzoxɔxɔ ƒe mɔxenu gbãtɔ ene na ememe aluminized films. Nutome takpɔkpɔ si gbɔ eme: te ŋu nɔa te ɖe -200°C va ɖo +260°C ƒe didime nu (ɣe dze ŋgɔ >120°C va ɖo vɔvɔli -160°C); anyigba ɣia ɖea ɣe ƒe keklẽ fiana; kpɔa polyimide film siwo wotsɔ aluminize wɔe siwo mebɔbɔ o ta tso ƒoƒo kple aɖatsi me. Ʋuʋu ƒe kpekpeɖeŋu: PTFE ƒe anyigba si me ʋuʋudedi le bɔbɔe xea mɔ na layer tangling le ƒunukpeƒe ƒe bɔbɔ me, si naa EVA te ŋu trɔna ɖe nɔnɔmewo ŋu.

Nyati sia ƒo nu tso viɖe siwo le Teflon avɔ si ƒe dzoxɔxɔ lolo ŋu zazã le lithium batri ƒe elektrikŋusẽnamɔ̃ ƒe ƒuƒu me ŋu. Wozãnɛ abe mɔ̃ siwo wotsɔna tsɔa nu alo dzodoƒe ƒe nutrenu ene, eye wokpɔa kuxi vevi etɔ̃ gbɔ: ʋuʋudedi ƒe ƒoƒo, eƒe xɔxlɔ̃, kple elektrikŋusẽ ƒe ʋuʋu. Ene viɖe teƒewo: Elektrode ƒe nyonyome kple kutsetse — anti-stick nɔnɔmewo xea mɔ na PVDF binder adhesion si wɔnɛ be bɔbɔe bliboe peeling; dzoxɔxɔ ƒe tsɔtsɔme ɖekae le 100-140°C xea mɔ na gbagbã/bibi; anyigba si le gbadzaa la ɖea ʋuʋudedi kple aŋɔ ƒe sisi ɖa; Nusiwo nɔa anyi didina kple dɔwɔwɔ ƒe liƒo — atikewo ƒe tsitretsitsi ɖe NMP solvent kple electrolyte vapors ŋu evɔ mevuvu/tsi o; tensile ŋusẽ gã kple didime li ke tso fiberglass substrate hena teƒe si sɔ pɛpɛpɛ; dzadzɛnyenye bɔbɔe kple nusiwo susɔ vie ne wotsɔe sɔ kple ga mesh belts.

Nyati sia ƒo nu tso fli ƒe duƒuƒu ƒe didime si bɔ na PTFE dzoxɔxɔ gã avɔ impregnation wɔwɔ fli. Duƒuƒu si bɔ: 2-15 m/min, dɔwɔwɔ ƒe didime si li ke 3-8 m/min, avɔ tsɛwo/fli sesẽwo vaseɖe 10-15 m/min. Mɔxenu siwo tso tsidedee ƒe gege ɖe eme gbɔ: ele be woatsɔ PTFE emulsion ayɔ avɔa me bliboe ɖe fiber bundle ƒe eme — duƒuƒu si nu sẽ akpa hea tsidedee si mesɔ o, resin dɔwuame kple ka ƒuƒuwo vɛ; emulsion viscosity, solids concentration, fabric weave density katã ɖea gege ɖe eme ƒe agbɔsɔsɔ dzi kpɔtɔna, si bia be woawɔ duƒuƒu blewu na avɔ siwo le kpekpem/siwo le kpekpem. Coating passes: pass geɖe (2-6+) si hiã na dense defect-free coating; gbãtɔ ƒe yiyi blewu na seke, woate ŋu adzi mɔzɔzɔ siwo kplɔe ɖo ɖe edzi le mɔ si sɔ nu.

Nyati sia ƒo nu tso silica ƒe agbɔsɔsɔ kple alesi wozãa avɔ si me silica sɔ gbɔ ɖo le glass fiber avɔ me ŋu. Silica ƒe agbɔsɔsɔ ƒe nɔnɔme: vevitɔ ƒe dzesi enye SiO2 ≥96% (dzidzenu 96-98%, premium grades >99% to acid leaching kple sintering, te ɖe quartz fiber dzadzɛ ŋu). Ewɔwɔ: E-glass avɔ toa acid dzodzoe ƒe ʋuʋu me be wòatsɔ alɔ akpa siwo menye silica o (boron oxide, sodium oxide), si wɔnɛ be ƒunukpeƒe si me silica sɔ gbɔ ɖo si me ʋuʋudedi le, emegbe wotsɔa wo ƒua gbe be wòaƒo. Viɖe veviwo: subɔsubɔdɔ si yia edzi le 900°C me le yame ƒe dzoxɔxɔ si me dzoxɔxɔ le me, ɣeyiɣi kpui aɖe ƒe dzoxɔxɔ si wu 1200°C, fafaƒe si gogo 1700°C; atikewo ƒe liƒo ɖe acid/alkali akpa gãtɔ ŋu negbe HF kple phosphoric acid dzodzoe koe mele eme o; dielectric constant si bɔbɔ kple insulation si li ke le dzoxɔxɔ gã me.

Nyati sia ƒo nu tso Teflon avɔ si me dzoxɔxɔ le ŋutɔ ƒe delamination nudzɔdzɔ ŋu. Delamination fia mama kple lãɖeɖe le anyigba dzi PTFE nutsyɔnu kple ememe fiberglass gɔmeɖoanyi avɔ dome alo le nutsyɔnu ƒe ƒuƒoƒo geɖe dome. Nukpɔkpɔ ƒe dzesiwo: ʋuʋudedi/ʋuʋudedi (kuɖɔ siwo kɔ ɖe dzi kple do ƒe seselelãme) abe dzesi gbãtɔwo ene; interlayer peeling kple coating si woɖena bɔbɔe le agbalẽ siwo ɖea fiberglass ɣi fiana me; localized whitening si kplɔe ɖo kple flaking le dzoxɔxɔ/friction megbe. Nu vevi siwo gbɔ wòtsona: Dzoxɔxɔ ƒe nuteɖeamedzi ƒe nugbegblẽ — dzoxɔxɔ ƒe kekeɖenudɔwɔwɔ ƒe xexlẽdzesi vovovo siwo le PTFE kple fiberglass dome hea ememe nuteɖeamedzi vɛ, dzoxɔxɔ/fafa ƒe tsatsam kabakaba hea vovototodedeameme vɛ; Ewɔwɔ ƒe nyonyome ƒe gbɔdzɔgbɔdzɔwo — fiberglass ƒe anyigbadzidɔwɔwɔ si mesɔ o, PTFE ƒe tsi si mesɔ o, sintering si mesɔ gbɔ o si hea dometsotso ƒe kadodo si gbɔdzɔ vɛ.

Nyati sia ƒo nu tso Teflon avɔ si me dzoxɔxɔ le ŋutɔ ƒe nu suewo ƒe nɔnɔmewo ŋu. Substrate skeleton: glass fiber weaving texture le plain/twill weaves me kple porosity gã (micron-scale pores le fiber bundles me kple le warp-weft nodes) si naa teƒe na PTFE impregnation. Coating nɔnɔme: blibo impregnation encapsulation wɔwɔ 'reinforced concrete' xɔtuɖoɖo afisi glass fibers le ŋusẽdodo phase, PTFE nye matrix madzudzɔmadzudzɔe; surface nodular microstructure of nodules (nusuewo) siwo do ƒome kple wo nɔewo to fibrils nyui siwo wowɔ le sintering me; ŋutigbalẽ ƒe ƒuƒoƒo si le ʋeʋẽm ɖaa (si ƒe titrime nye micron geɖe va ɖo ewo) si me PTFE dzadzɛ le abe mɔxenu vevitɔ si xea mɔ na atikewo ƒe dɔmawɔmawɔ, nɔnɔme siwo meléna ɖe nu ŋu o, kple elektrikŋusẽ ƒe xɔxlɔ̃ ene.

Nyati sia dzro PTFE avɔ si me dzoxɔxɔ le ŋutɔ ƒe xɔtuɖoɖo me le tsitsi me. Akpa ene: PTFE nutsyɔnu microstructure — molecule kɔsɔkɔsɔ scission kple oxidation (carbonyl / carboxyl ƒuƒoƒo wɔwɔ), crystallinity tɔtrɔ (kaba dziyi emegbe mumu), micro-crack kple pinhole wɔwɔ, anyigba dzi powdering; Glass fiber substrate kple interface — sizing/coupling agent decomposition si hea kadodo ƒe bu, interfacial debonding kple delamination (blistering, teƒe ɣiwo), glass fiber network ƒe ʋuʋu kple embrittlement, alkali metal oxide ƒe tsidzadza si hea nuteɖeamedzi ƒe xɔxlɔ̃ vɛ; Macroscopic wɔwɔme kple dzedzeme — amadede ƒe tɔtrɔ (yevu→beige→brown→yibɔ), shrinkage deformation kple curling, anyigba ƒe roughening kple gloss bu, powdering ne woka asi eŋu, keŋkeŋ bu le asitɔtrɔ le nɔnɔmewo ŋu. Tsitsi ƒe vevienyenye: ŋgɔyiyi ƒe ɖoɖo si nye 'nutsyɔnu ƒe gbegblẽ → ƒomedodo ƒe kpododonu → substrate ƒe gbegblẽ.'

Nyati sia ƒo nu tso alesi woakpɔ PTFE avɔ si ƒe dzoxɔxɔ lolo ƒe sintering ɣeyiɣi dzi. Core dziɖuɖu mɔnu: fli ƒe duƒuƒu ƒe asitɔtrɔ. Sintering ɣeyiɣi = dzoxɔxɔ nyui ƒe akpa ƒe didime ÷ avɔ ƒe mɔzɔzɔ ƒe duƒuƒu. Sintering threshold nyuitɔ nye 350°C (le dzoxɔxɔ sia dzi la, wobua sintering ɣeyiɣi). Dzoxɔxɔ ƒe mama le nuto vovovowo me: dzoxɔxɔ do ŋgɔ (100-250°C), dzoxɔxɔ (360-395°C), dzoxɔxɔ gã ɖoɖo (380-390°C), fafa (si le 300°C te). Ɣeyiɣi siwo woatsɔ akpɔe le 380-390°C: eƒe kpekpeme le bɔbɔe (0.08-0.13mm) sɛkɛnd 30-60; dzidzenu (0.18-0.25mm) miniti 1.5-3; kpekpe (≥0.35mm) miniti 3-5. De dzesii kple asitɔtrɔ: under-sintering (ŋusẽ si le sue, powder shedding, micro-cracks) → ɖe duƒuƒu dzi kpɔtɔ be nàdidi ɣeyiɣi ɖe edzi; over-sintering (yellowing, brittleness, white fumes) → dzi duƒuƒu ɖe edzi be wòanɔ kpuie. Dzoxɔxɔ-ɣeyiɣi ƒe sɔsɔ ɖe mɔ na dzoxɔxɔ si nu sẽ ƒe dzoxɔxɔ kabakaba (395-405°C, sɛkɛnd) alo dzoxɔxɔ si bɔbɔ ƒe dzoxɔxɔ blewu (360-375°C, miniti 5-8).