Saa asɛm yi hwehwɛ nkɛntɛnso a platinum catalyst type ne concentration nya wɔ crosslinking kinetics a addition-cure silicone rɔba. Catalyst ahorow: Speier catalyst (chloroplatinic acid, Pt4+) hwehwɛ sɛ wɔtew so ma ɛyɛ nnam low-valent species, a ɛyɛ adwuma sɛ precatalyst; Karstedt aduru a ɛma nneɛma yɛ kɛse (Pt0 a divinyltetramethyldisiloxane ka ho) hyɛn nneɛma a ɛma nneɛma yɛ kɛse no mu tẽẽ. Type effects: Speier kyerɛ induction bere a ɛda adi pefee a S-shaped curing curve (ɛyɛ brɛoo ntɛm, ɛyɛ ntɛmntɛm akyiri yi) ne activation ahoɔden a ɛda adi sɛ ɛkorɔn; Karstedt kyerɛ sɛ induction biara nni hɔ, mfiase rate a ɛkorɔn a exotherm a ano yɛ nnam wom, activation ahoɔden a ɛba fam.

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 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 ka dodow a ɛne ne ho hyia wɔ gel fã ne ahoɔden a ɛka bom wɔ silicone nhyɛso-te nka adhesives ma Teflon tape ntam. Gel fã = mass ɔha biara mu nkyem a ɛyɛ crosslinked network a entumi nnye toluene mu (Soxhlet extraction, 24hr). Ahoɔden a ɛka bom a ɛda nsow ne ɔhyew a ɛkorɔn a ɛkura tumi (180°C, 1kg). Ranges abiɛsa: ase critical point (<60%) — percolating network biara nni hɔ, kura tumi a ɛbɛn zero; practical range (60-85%) — cohesive ahoɔden nyin exponentially ne gel fraction, 60%→70% ma bere a wɔde kura mu fi simma kosi nnɔnhwerew, 70%→80% ma 3-10x nkɔanim; crosslinking a ɛkorɔn (>85%) — mfasoɔ brɛoo (85%→95% 20-50% pɛ kɔ soro), tack kɔ fam kɛseɛ, >95% hwere PSA agyapadeɛ.

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 ɛhyɛ so, nanso nkɔnsɔnkɔnsɔn mu mpaapaemu da so ara yɛ kɛse.

Saa asɛm yi ka Teflon ntama a ɛyɛ hyew kɛse a wɔde di dwuma wɔ spacesuit thermal insulation layers mu 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 aluminium 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 ayɛ abɔso ho a.

Saa asɛm yi ka sɛnea wɔde peroxide crosslinking agents (BPO ne DCP) a ɛporɔw hyew ne ne fã nkwa nna ne curing process window a wɔde yɛ Teflon tape no bɛyɛ pɛ. Core data: BPO — 1-simma fã nkwa wɔ ~ 131 ° C, 1-hr wɔ ~ 92 ° C, 10-hr wɔ ~ 72 ° C; DCP — 1-min wɔ ~ 171 ° C, 1-hr wɔ ~ 135 ° C, 10-hr wɔ ~ 115 ° C. Nteaseɛ a ɛne ne ho hyia: adhesive hia 97-99% crosslinking = 5-7 fã-nkwa; bere a wɔde sa yare = 5-7 × nkwa fã wɔ ɔhyew a wɔde asi wɔn ani so. Back-bu ɔhyew fi production line residence bere anaasɛ back-bu bere fi maximum a wɔma ho kwan.

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 tew penetration rate so, 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 de nsonsonoe a ɛda infrared radiation heating ne hot-air circulation heating ntam toto crosslinked structure uniformity of silicone adhesive layer ho. Ɔhyew a wɔde kɔ baabi foforo: mframa a ɛyɛ hyew yɛ convection-conduction, ɛyɛ brɛoo na ɛkɔ so, na ɛma ɔhyew a ɛkɔ soro a ɛkɔ fam; IR yɛ radiation-absorption a ɛwɔ soro absorption a emu yɛ den (micrometers kosi millimeters) a ɛma ɛyɛ mmepɔwmmepɔw soro-kɔ-mfinimfini gradient. Nkɛntɛnso a ɛwɔ crosslink density kyekyɛ so: mframa a ɛyɛ hyew ma emu ne akyi afã horow no kwan ma ɛkame ayɛ sɛ hyɛn vulcanization temperature range mu bere koro mu, na ɛma crosslink density a ɛyɛ pɛ wɔ thickness no mu; IR ma soro layer sa ntɛm ara a ɛyɛ honam ani a ɛyɛ den a esiw ɔhyew a ɛkɔ baabi foforo kwan, na ɛde sharp gradient of crosslink density so tew fi soro kɔ mu ba.

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.