Sengoliloeng sena se akaretsa menyetla ea ts'ebeliso ea lesela la mocheso o phahameng oa Teflon indastering e hlahang ea betri ea boemo bo tiileng. Libaka tse 'nè: Ho etsa li-membrane tsa electrode / electrolyte tse omileng - mabanta a conveyor a mocheso a phahameng a mocheso o thibelang lithupa bakeng sa ho hatisa hot roll (150-250 ° C) ho nolofalletsang ho peeling boreleli ba lifilimi tse ikemetseng; hot rolara kwahelang lera e le seka-ka ho sa feleng-ba khahlanong le thupa lera; e tiisa bokaholimo ba filimi e boreleli, e fokotsa liphoso, e ntlafatsa chai. Lokolla li-liner le li-cushioning pads bakeng sa densification e chesang e chesang - libeteri tsa sulfide / polymer li hloka ho hatelloa ha isostatic / flat flat (100-300 ° C, mashome a MPa); Lesela la PTFE le behiloeng pakeng tsa stack ea betri le hlobo le thibela ho khomarela, le nolofalletsa ho ajoa ha khatello e tšoanang ka micro-elasticity, ho sireletsa lipoleiti tse futhumatsang.

Sengoliloeng sena se hlahloba liphetoho ho liketane tsa limolek'hule tsa PTFE tlas'a mahlaseli a ultraviolet. Main-chain scission le phokotso ea boima ba limolek'hule: UV (254nm, 471 kJ/mol) e roba bond CC (347 kJ/mol), e bakang homolysis, e hlahisa li-radicals tsa mahala tse felisitsoeng ke CF₂, ho theoha ho matla ha limolek'hule, tahlehelo ea boima le bolelele. Litsela tsa mahala tsa radical reaction: ka oksijene, li-peroxy radicals li theha, ho hlophisa bocha ho acyl fluoride (-COF) le lihlopha tsa ho qetela tsa carboxylic acid (-COOH), ho lokolla COF₂ le CO₂ (COF₂ hydrolyzes ho HF); libakeng tse sa sebetseng, ho se leka-lekane / ho kopanngoa hoa busa, empa ketane scission e ntse e le eona e ka sehloohong.

Sengoliloeng sena se akaretsa ts'ebeliso ea lesela la mocheso o phahameng oa Teflon ka har'a sepakapaka sa mohatsela oa mocheso. Lintho tse bonahalang: Lesela la fiberglass le koahetsoeng ke PTFE, le tsejoang sebakeng sa sefofane e le lesela la Beta, le kopanyang ho feto-fetoha ha lesela le PTFE e feteletseng-tikoloho inertness. Karolo: karolo e ka ntle ea Thermal Micrometeoroid Garment (TMG) ka li-unit tsa motsamao tsa extravehicular, tse shebaneng ka kotloloho le vacuum, phapang e feteletseng ea mocheso, le li-micrometeoroids e le tšitiso ea pele ea 'mele / mocheso bakeng sa lifilimi tse ka hare tsa aluminium. Tšireletso e feteletseng ea tikoloho: e mamella -200 ° C ho ea +260 ° C (e shebaneng le letsatsi> 120 ° C ho ea moriting -160 ° C); bokaholimo bo bosoeu bo bonahatsa mahlaseli a letsatsi; e sireletsa lifilimi tse senyehang tsa aluminium tsa polyimide ho tsoa mengopeng le meokhong. Thuso ea ho sisinyeha: khohlano e tlase ea PTFE e thibela ho tsitsinyeha ha lera nakong ea ho kobeha ha manonyeletso, ho netefatsa hore EVA e fetoha le maemo.

Sengoliloeng sena se akaretsa melemo ea ts'ebeliso ea lesela la Teflon le mocheso o phahameng ka ho omisa li-electrode tsa lithium. E sebelisoa e le mabanta a conveyor kapa liner tsa ontong, e rarolla mathata a mararo a mantlha: slurry adhesion, corrosion, le electrode scratching. Libaka tse 'nè tsa melemo: Boleng ba Electrode le lihlahisoa - thepa e khahlanong le lithupa e thibela ho khomarela PVDF binder e nolofalletsang ho peeling ho feletseng habonolo; conductivity e tšoanang ea mocheso ho 100-140 ° C e thibela ho phunyeha / ho chesa; bokaholimo bo boreleli bo felisa mengopo le phokotseho ea phofshoana; Ho tšoarella le botsitso ba ts'ebetso - khanyetso ea lik'hemik'hale khahlanong le mouoane oa NMP le mouoane oa electrolyte ntle le ho ruruha / botsofali; matla a phahameng a tsitsipano le botsitso ba sebopeho ho tloha ho fiberglass substrate bakeng sa boemo bo nepahetseng; ho hloekisa habonolo ka masala a fokolang ha ho bapisoa le mabanta a tšepe.

Sengoliloeng sena se akaretsa lebelo le tloaelehileng la lebelo bakeng sa mohala oa tlhahiso ea lesela la PTFE le mocheso o phahameng oa mocheso. Lebelo le tloaelehileng: 2-15 m / min, sebaka se tsitsitseng sa ts'ebetso ea 3-8 m / min, masela a mosesaane / mela e phahameng ho fihlela ho 10-15 m / min. Litšitiso tsa ho kenella ho kenella: lesela le tlameha ho tlala ka botlalo ka PTFE emulsion ho kena ka har'a li-fiber bundle insides - lebelo le phahameng haholo le baka ho se lekane ho kenngoa, tlala ea resin le likhoele tse omeletseng; emulsion viscosity, solids concentration, lesela la weave density kaofela li fokotsa sekhahla sa ho kenella, tse hlokang lebelo le tlase bakeng sa masela a teteaneng / a teteaneng. Liphasete tsa ho roala: li-passes tse ngata (2-6+) tse hlokahalang bakeng sa ho roala ho se nang sekoli; pele ho feta butle bakeng sa ho anchoring, liphase tse latelang li ka eketseha ka mokhoa o itekanetseng.

Sengoliloeng sena se akaretsa litaba tsa silika le maemo a ts'ebeliso ea lesela la fiber e phahameng ea silika. Tlhaloso ea litaba tsa silika: pontšo ea mantlha ke SiO₂ ≥96% (e tloaelehileng 96-98%, litekanyetso tsa premium> 99% ka acid leaching le sintering, e atamelang fiber e hloekileng ea quartz). Tlhahiso: Lesela la E-glass le kena ka har'a asiti e chesang ho qhaqha likarolo tseo e seng tsa silika (boron oxide, sodium oxide), ho etsa skeleton e nang le porous high-silica skeleton, ebe e siloa bakeng sa densification. Melemo ea mantlha: ts'ebeletso e tsoelang pele ho 900 ° C libakeng tse nang le oxidizing, nako e khuts'oane ka holimo ho 1200 ° C, sebaka sa ho nolofatsa haufi le 1700 ° C; botsitso ba lik'hemik'hale khahlanong le li-acids / alkali tse ngata ntle le HF le hot phosphoric acid; li-insulation tsa dielectric tse tlaase le tse tsitsitseng ka mocheso o phahameng.

Sengoliloeng sena se akaretsa ketsahalo ea delamination ea lesela la mocheso o phahameng oa Teflon. Delamination e bolela karohano le ho ebola pakeng tsa holim'a PTFE barbotage le ka hare fiberglass base lesela kapa pakeng tsa multiple barbota le dikarolo. Lipontšo tse bonahalang: ho phatloha / ho phunyeha (li-bubble tse phahamisitsoeng tse nang le maikutlo a sekoti) e le matšoao a pele; interlayer peeling ka ho roala ho tlosoa habonolo ka maqephe a pepesang fiberglass e tšoeu; bosweu ba sebakeng se lateloang ke ho benya ka mora mocheso/kgohlano. Lisosa tse ka sehloohong: Tšenyo ea khatello ea mocheso - li-coefficients tse fapaneng tsa ho atolosa mocheso pakeng tsa PTFE le fiberglass li baka khatello ea kelello ka hare, ho futhumatsa ka potlako / ho pholile ho etsa hore ho be le sesole; Litšitiso tsa boleng ba tlhahiso - phekolo e sa lekaneng ea fiberglass holim'a metsi, ho kenngoa ha PTFE e fokolang, sintering e sa lekaneng e bakang maqhama a fokolang a sefahleho.

Sehlooho sena se hlalosa litšobotsi tsa microstructural tsa Teflon lesela la mocheso o phahameng oa mocheso. Substrate skeleton: fiber fiber weaving texture ka plain/twill weave with high porosity (micron-scale pores ka hare ho fiber bundles le at warp-weft nodes) ho fana ka sebaka bakeng sa ho kenngoa ha PTFE. Coating morphology: encapsulation encapsulation e felletseng e theha 'konkreite e matlafalitsoeng'' moo likhoele tsa khalase li matlafatsang mohato, PTFE ke matrix a tsoelang pele; holim'a li-nodular microstructure ea li-nodule (likaroloana) tse kopantsoeng ke li-fibrils tse ntle tse entsoeng nakong ea sintering; lera le sa khaotseng le letenya la letlalo (tse 'maloa ho isa ho mashome a li-micron tse botenya) la PTFE e hloekileng e le mokoallo oa bohlokoa bakeng sa ho se sebetse ha lik'hemik'hale, thepa e sa thupeng le ho kenya motlakase.

Sehlooho sena se hlahloba liphetoho tsa meralo ea lesela la PTFE le mocheso o phahameng nakong ea botsofali. Lintlha tse 'nè: PTFE coating microstructure - molecular chain scission and oxidation (carbonyl/carboxyl group formation), liphetoho tsa crystallinity (tsoho ea pele ebe e oa), micro-crack le pinhole formation, holim'a phofo; Glass fiber substrate and interface - sizing/coupling agent decomposition e baka tahlehelo ea bonding, interfacial debonding le delamination (blistering, white areas), glass fiber network khoholeho le embrittlement, alkali metal oxide precipitation e bakang khatello ea maikutlo; Sebopeho le ponahalo ea macroscopic - phetoho ea 'mala (e tšoeu → beige→ sootho → e ntšo), ho honyela ho hoholo le ho kobeha, ho putlama ha bokaholimo le ho lahleheloa ke gloss, phofshoana ha motho a ama, tahlehelo e felletseng ea ho feto-fetoha ha maemo. Moko oa botsofali: ts'ebetso e tsoelang pele ea 'ho silafala ha mokhabiso → ho se sebetse hantle ha sebopeho → ho senyeha ha karoloana.'

Sengoliloeng sena se akaretsa mokhoa oa ho laola nako ea sintering ea lesela la mocheso o phahameng oa PTFE. Mokhoa oa taolo ea mantlha: phetoho ea lebelo la mohala. Sintering nako = bolelele ba karolo e futhumatsang e sebetsang ÷ lebelo la leeto la lesela. Mocheso o sebetsang hantle oa sintering ke 350°C (kaholimo ho thempereichara e baloa joalo ka nako ea sintering). Kabo ea mocheso oa libaka tse ngata: preheating (100-250 ° C), sintering (360-395 ° C), boemo ba mocheso o phahameng (380-390 ° C), ho pholisa (ka tlase ho 300 ° C). Linako tsa litšupiso ho 380-390 ° C: bobebe (0.08-0.13mm) metsotsoana e 30-60; maemo a tloaelehileng (0.18-0.25mm) metsotso e 1.5-3; boima (≥0.35mm) metsotso e 3-5. Ho tsebahatsa le ho lokisoa: ho fokotseha ho tlase (matla a tlase, phokotso ea phofo, mapetsong a manyane) → fokotsa lebelo ho eketsa nako; ho sintering ho feta tekano (mosehla, ho brittleness, mosi o mosoeu) → eketsa lebelo ho khutsufatsa bolulo. Tekano ea nako ea mocheso e lumella ho sintering ka potlako ea mocheso o phahameng (395-405 ° C, metsotsoana) kapa mocheso o tlaase o liehang (360-375 ° C, 5-8 metsotso).