Saa asɛm yi ka hokwan ahorow a wobetumi de adi dwuma ama Teflon ntama a ɛyɛ hyew kɛse wɔ batere adwuma a ɛreba no mu. Mmeae anan: Dry electrode/electrolyte membrane manufacturing — ɔhyew a ɛkorɔn anti-stick conveyor belts ma ɔhyew roll pressing (150-250 ° C) a ɛma wotumi peeling smooth of self-supporting films; ɔhyew roller kata so layer sɛ semi-daa anti-stick layer; hwɛ hu sɛ film no ani yɛ torotoro, ɛtew sintɔ ahorow so, ɛma aba a wonya no tu mpɔn. Gyae liners ne cushioning pads ma ɔhyew-pressing densification — sulfide / polymer batere hia ɔhyew isostatic / flat pressing (100-300 ° C, MPa du du); PTFE ntama a wɔde si battery stack ne nkuku ntam no siw adhesion ano, ɛma wotumi kyekyɛ nhyɛso a ɛyɛ pɛ denam micro-elasticity so, ɛbɔ ɔhyew mprɛte ho ban.

Saa asɛm yi hwehwɛ nsakrae a ɛba PTFE molecule nkɔnsɔnkɔnsɔn mu wɔ ultraviolet mframa ase. Main-chain scission ne molecule weight reduction: UV (254nm, 471 kJ/mol) bubu CC bonds (347 kJ/mol), na ɛde homolysis ba, ɛma CF2-terminated free radicals, molecule mu duru a ɛkɔ fam denneennen, toughness ne elongation a ɛyera. Free radical reaction akwan: wɔ oxygen mu no, peroxy radicals ba, ɛsan hyehyɛ ma ɛbɛyɛ acyl fluoride (—COF) ne carboxylic acid (—COOH) awiei akuw, na ɛma COF2 ne CO2 gyae (COF2 hydrolyzes to HF); wɔ wim tebea a ɛnyɛ adwuma mu no, disproportionation/recombination na ɛwɔ hɔ kɛse, nanso nkɔnsɔnkɔnsɔn mu mpaapaemu da so ara yɛ kɛse.

Saa asɛm yi ka Teflon ntama a ɛyɛ hyew kɛse a wɔde di dwuma wɔ ahunmu ntade a wɔde siw ɔhyew ano ho asɛm. Nneɛma titiriw: PTFE-coated fiberglass ntama, a wonim no wɔ ahunmu sɛ Beta ntama, a ɛka ntama a ɛyɛ mmerɛw ne PTFE extreme-environment inertness bom. Dwuma: Thermal Micrometeoroid Garment (TMG) akyi fã kɛse wɔ extravehicular mobility units mu, a ɛhwɛ vacuum tẽẽ, ɔhyew mu nsonsonoe a emu yɛ den, ne micrometeoroids sɛ honam fam/ɔhyew akwanside a edi kan ma emu aluminized films. Nneɛma a atwa yɛn ho ahyia ho banbɔ a ɛtra so: egyina -200°C kosi +260°C ano (ɛhwɛ owia >120°C kosi sunsuma -160°C); fitaa a ɛwɔ soro no da owia hann adi; bɔ polyimide sini ahorow a wɔde aluminize ayɛ a ɛyɛ mmerɛw ho ban fi nsensanee ne nusu ho. Motion mmoa: low friction PTFE soro siw layer tangling bere a nkwaa bending, hwɛ hu sɛ EVA flexibility.

Saa asɛm yi ka mfaso a ɛwɔ Teflon ntama a ɛyɛ hyew kɛse a wɔde di dwuma wɔ lithium battery electrode drying mu ho asɛm. Wɔde di dwuma sɛ conveyor belts anaa oven liners, na edi ɔhaw atitiriw abiɛsa ho dwuma: slurry adhesion, corrosion, ne electrode scratching. Mfaso anan mmeae: Electrode su ne aba — anti-stick su siw PVDF binder adhesion a ɛma ɛyɛ mmerɛw koraa peeling; ɔhyew a ɛyɛ pɛ wɔ 100-140°C siw mpaapaemu/ɔhyew ano; sɛ ɛyɛ torotoro a, eyi nsensanee ne powder a ɛhwie gu fi hɔ; Durability ne adwumayɛ mu pintinn — nnuru a ɛko tia NMP solvent ne electrolyte vapors a enni ahonhon / onyin; ahoɔden a ɛkorɔn a ɛtwetwe ne dimensional stability fi fiberglass substrate ma gyinabea pɛpɛɛpɛ; ɛnyɛ den sɛ wobɛhohoro ho a nkae kakraa bi na ɛwom sɛ wɔde toto dade a wɔde ahama abɔso ayɛ ho a.

Saa asɛm yi kata typical line ahoɔhare range ma PTFE high-temperature ntama impregnation production line. Ahoɔhare a wɔtaa de di dwuma: 2-15 m/min, adwumayɛ kwan a ɛyɛ den 3-8 m/min, ntama a ɛyɛ tratraa/ahoɔhare kɛse nhama a ɛkɔ 10-15 m/min. Anohyeto ahorow a efi nsu a wɔde hyɛ mu no mu: ɛsɛ sɛ wɔde PTFE emulsion hyɛ ntama mu ma koraa kɔ fiber bundle mu — ahoɔhare a ɛkɔ soro dodo de nsu a ɛnyɛ nea ɛfata, resin kɔm ne nhama a ɛyɛ dry ba; emulsion viscosity, solids concentration, fabric weave density nyinaa brɛ penetration rate ase, na ɛhwehwɛ sɛ wɔde ahoɔhare yɛ brɛoo ma ntama a ɛyɛ den/dense. Coating passes: passes pii (2-6+) a ɛho hia ma dense defect-free coating; first pass slower for anchoring, akyiri yi passes betumi akɔ soro kakra.

Saa asɛm yi ka silica a ɛwɔ mu ne sɛnea wɔde di dwuma wɔ silica ahwehwɛ nhama a ɛdɔɔso ntama mu ho asɛm. Silica content specification: core indicator ne SiO2 ≥96% (gyinabea 96-98%, premium grades >99% denam acid leaching ne sintering, bɛn quartz fiber kronkron). Nneɛma a wɔyɛ: E-glass ntama no fa acid a ɛyɛ hyew mu ma ɛpete nneɛma a ɛnyɛ silica (boron oxide, sodium oxide), na ɛma ɛyɛ nnompe a silica pii wom a ɛwɔ abon, afei wɔde sintered ma ɛyɛ den. Mfaso titiriw: ɔsom adwuma a ɛkɔ so wɔ 900°C wɔ wim tebea a ɛyɛ hyew mu, bere tiaa mu boro 1200°C, beae a ɛyɛ mmerɛw a ɛbɛn 1700°C; nnuru a ɛgyina pintinn tia acid/alkali dodow no ara gye HF ne phosphoric acid a ɛyɛ hyew; dielectric constant a ɛba fam ne insulation a ɛyɛ den wɔ ɔhyew a ɛkɔ soro mu.

Saa asɛm yi ka delamination phenomenon a ɛwɔ Teflon ntama a ɛyɛ hyew kɛse mu ho asɛm. Delamination kyerɛ mpaapaemu ne peeling ntam PTFE coating a ɛwɔ soro ne fiberglass base ntama a ɛwɔ mu anaasɛ coating layers pii ntam. Nneɛma a wɔda no adi wɔ aniwa so: akisikuru/abubuw (ahurututu a ɛkɔ soro a ɛte sɛ tokuru) sɛ sɛnkyerɛnne a edi kan; interlayer peeling a coating a ɛnyɛ den sɛ wobeyi afi nkratafa a ɛda fiberglass fitaa adi mu; localized whitening a ɛno akyi no flaking akyi ɔhyew/friction. Nneɛma titiriw a ɛde ba: Ɔhyew nhyɛso sɛe — ɔhyew ntrɛwmu nsusuwii ahorow a ɛsono wɔ PTFE ne fiberglass ntam no ma emu nhyɛso ba, ɔhyew/onwini kyinhyia a ɛkɔ ntɛmntɛm no ma ɛtwetwe; Production quality defects — fiberglass surface treatment a ɛnnɔɔso, PTFE impregnation a enye, sintering a ɛnnɔɔso a ɛde interfacial bonding a ɛyɛ mmerɛw ba.

Saa asɛm yi kyerɛkyerɛ Teflon ntama a ɛyɛ hyew kɛse no microstructural su ahorow mu. Substrate nnompe: glass fiber weaving texture wɔ plain/twill weaves a porosity a ɛkorɔn (micron-scale pores wɔ fiber bundles mu ne wɔ warp-weft nodes) a ɛma baabi ma PTFE impregnation. Coating morphology: full impregnation encapsulation a ɛyɛ 'reinforced concrete' nhyehyɛe a ahwehwɛ nhama reyɛ den phase, PTFE yɛ kɔ so matrix; surface nodular microstructure of nodules (particles) a fibrils fɛfɛ a ɛba bere a wɔreyɛ sintering no abɔ mu; kɔ so dense skin layer (a ne kɛse yɛ microns pii kosi du du) a PTFE kronkron sɛ akwanside titiriw ma nnuru a ɛnyɛ adwuma, su a ɛnyɛ nea ɛbata ho, ne anyinam ahoɔden a wɔde siw ano.

Saa asɛm yi hwehwɛ nsakrae a ɛba PTFE ntama a ɛyɛ hyew kɛse mu wɔ nhyehyɛe mu bere a onyin mu. Afã anan: PTFE coating microstructure — molecule nkɔnsɔnkɔnsɔn scission ne oxidation (carbonyl / carboxyl kuw a wɔhyehyɛ), crystallinity nsakrae (ntɛmntɛm sɔre afei ɔhwe ase), micro-mpaapaemu ne pinhole formation, soro powdering Glass fiber substrate ne interface — sizing/coupling agent decomposition a ɛde bonding a ɛyera ba, interfacial debonding ne delamination (blistering, mmeae fitaa), glass fiber network erosion ne embrittlement, alkali metal oxide osutɔ a ɛde stress corrosion ba Macroscopic nhyehyɛe ne ne hwɛbea — kɔla nsakrae (fitaa → beige → bruu → tuntum), shrinkage deformation ne curling, soro roughening ne gloss hwere, powdering bere a woka, koraa hwere flexibility. Essence of onyin: nkɔso kwan a wɔfa so yɛ 'coating degradation → interface huammɔdi → substrate asɛe.'

Saa asɛm yi ka sɛnea wɔhwɛ sintering bere a PTFE ntama a ɛyɛ hyew kɛse so. Core control kwan: line ahoɔhare nsakrae. Sintering bere = ɔhyew ɔfã tenten a etu mpɔn ÷ ntama akwantu ahoɔhare. Sintering threshold a etu mpɔn yɛ 350°C (a ɛboro saa ɔhyew yi bu akontaa sɛ sintering bere). Ɔhyew a wɔkyekyɛ wɔ mmeae pii: ɔhyew a edi kan (100-250°C), sintering (360-395°C), ɔhyew a ɛkorɔn a wɔde si hɔ (380-390°C), onwini (a ɛba fam 300°C). Mmere a wɔde gyina hɔ ma wɔ 380-390°C: emu yɛ hare (0.08-0.13mm) sikani 30-60; gyinapɛn (0.18-0.25mm) simma 1.5-3; emu yɛ duru (≥0.35mm) simma 3-5. Nkyerɛkyerɛmu ne nsakrae: under-sintering (ahoɔden a ɛba fam, powder shedding, micro-cracks) → tew ahoɔhare so ma ɛtrɛw bere mu; over-sintering (yellowing, brittleness, white fumes) → ma ahoɔhare kɔ soro na ama baabi a wɔtra no ayɛ tiaa. Ɔhyew-bere a ɛyɛ pɛ ma kwan ma wɔde ɔhyew a ɛkɔ soro ntɛmntɛm sintering (395-405°C, sikani) anaasɛ low-temp slow sintering (360-375°C, simma 5-8).