Tsab ntawv xov xwm no hais txog yuav ua li cas kom phim txheej tshuab kab nrawm thiab qhov cub ntev kom ntseeg tau tias organosilicone nplaum ncav cuag lub hom phiaj kho kom sov rau PTFE daim kab xev. Lub hauv paus ntsiab lus tseem ceeb: tag nrho lub sijhawm nyob hauv t_total = qhov cub ntev L ÷ kab ceev v yuav tsum tsis pub tsawg tshaj li qhov yuav tsum tau kho lub sijhawm kho. Tau txais cov yam ntxwv kho mob los ntawm DSC lossis cov tshuaj nplaum kho mob uas tsim kom muaj 'kub - yam tsawg kawg nkaus kho lub sij hawm' kev sib raug zoo. Cov qauv sib npaug sib npaug: faib qhov cub rau hauv ib cheeb tsam, xam ti = Li / v thiab tcure(Ti), xyuas kom ∑(ti/tcure(Ti)) ≥1. Cov txheej txheem suav: teeb tsa qhov kub thiab txias nrog qhov ntev Li thiab kub Ti; teem kab ceev v, xam txhua cheeb tsam lub sij hawm nyob thiab qhov sib piv; iterate kom txog thaum tag nrho ≥1 (safety margin 1.1-1.2 pom zoo).

Kab lus no npog cov teebmeem ntawm gamma-ray irradiation ntawm PTFE qauv thiab cov khoom. Cov qauv tshuaj hloov pauv: gamma rays tawg CC lub ntsiab chains thiab CF sab chains (G-tus nqi 3.0-3.5), ua rau cov saw loj loj thiab hnyav molecular poob; Hauv cov pa oxygen, cov dawb radicals tsim peroxy radicals qhia acyl fluoride thiab carboxylic acid kawg pawg (hydrolyzing rau HF). Condensed qauv hloov: crystallinity nce pib (tsawg koob, luv chains rearrange) ces ntog (ntau dua, tsis xws luag cuam tshuam crystals); lamellar crystals tawg mus rau hauv me me crystallites nrog ploj mus ntev-ntev kev txiav txim. Khoom deterioration: elongation ntawm tawg poob ntawm 0.1 kGy nyob rau hauv huab cua, poob> 90% ntawm ~ 1kGy - cov khoom yuav nruj thiab nkig; melting point poob los ntawm 327 ° C mus rau hauv qab 310 ° C; polar pawg me ntsis tsa dielectric tas li / poob; nto hloov ntawm dawb mus rau grey / dub nrog gloss poob.

Kab lus no suav nrog daim ntawv thov zoo ntawm Teflon high-temperature npuag hauv lithium roj teeb electrode ziab. Siv los ua cov siv conveyor lossis qhov cub liner, daws peb qhov teeb meem tseem ceeb: slurry adhesion, corrosion, thiab electrode khawb. Plaub qhov kom zoo dua: Electrode zoo thiab tawm los - los tiv thaiv cov khoom tiv thaiv PVDF binder adhesion ua kom yooj yim ua kom tiav; uniform thermal conductivity ntawm 100-140 ° C tiv thaiv tawg / scorching; du nto tshem tawm khawb thiab hmoov shedding; Durability thiab kev ua haujlwm ruaj khov - tshuaj tiv thaiv tiv thaiv NMP hnyav thiab electrolyte vapors yam tsis muaj o / laus; siab tensile lub zog thiab qhov ntev stability ntawm fiberglass substrate rau meej qhov chaw; yooj yim tu nrog tsawg residue piv rau hlau mesh siv.

Kab lus no hais txog qhov tshwm sim delamination ntawm Teflon high-temperature ntaub. Delamination yog hais txog kev sib cais thiab tev ntawm qhov chaw PTFE txheej thiab sab hauv fiberglass puag ntaub los yog ntawm ntau txheej txheej. Kev pom kev pom: blistering / bulging (nce npuas nrog hollow xav) raws li cov cim thaum ntxov; interlayer tev nrog txheej yooj yim tshem tawm hauv cov nplooj ntawv nthuav tawm cov fiberglass dawb; localized whitening ua raws li flaking tom qab tshav kub / kev sib txhuam. Cov laj thawj tseem ceeb: Kev kub ntxhov siab - sib txawv thermal expansion coefficients ntawm PTFE thiab fiberglass tsim kev ntxhov siab sab hauv, cua kub ceev / cua txias ua rau detachment; Kev tsim khoom tsis zoo - kev kho fiberglass tsis txaus, tsis zoo PTFE impregnation, tsis txaus sintering ua rau tsis muaj zog interfacial bonding.

Kab lus no tshuaj xyuas cov qauv kev hloov pauv hauv PTFE cov ntaub ntawv kub kub thaum laus. Plaub yam: PTFE txheej microstructure - molecular saw scission thiab oxidation (carbonyl / carboxyl pawg tsim), crystallinity hloov (thaum sawv ntxov ces cev qhuav dej), micro-crack thiab pinhole tsim, nto hmoov; iav fiber ntau substrate thiab interface - sizing / coupling tus neeg sawv cev decomposition ua rau poob ntawm kev sib txuas, interfacial debonding thiab delamination (blistering, dawb cheeb tsam), iav fiber ntau yaig thiab embrittlement, alkali hlau oxide nag lossis daus ua rau muaj kev ntxhov siab corrosion; Cov qauv macroscopic thiab tsos - xim hloov (dawb → beige → xim av → dub), shrinkage deformation thiab curling, nto roughening thiab gloss poob, hmoov thaum kov, ua tiav tsis yooj yim. Qhov tseem ceeb ntawm kev laus: txheej txheem txheej txheem ntawm 'coating degradation → interface tsis ua hauj lwm → substrate degradation.'

Kab lus no piav qhia txog cov qauv ntawm kev hloov pauv hauv kev sib koom ua ke ntawm PTFE high-temperature tape adhesive layer after high-temperature aging. Peb-theem qauv: Tom qab kho qhov nce theem (thaum ntxov-qhov kub thiab txias ntawm 200-260 ° C, cov pab pawg residual reactive txuas ntxiv txuas ntxiv, cohesion nce ntxiv); Stable equilibrium theem (crosslinking mus kom tiav, cohesion tseem ruaj khov nyob rau lub sij hawm ntev); Degradation thiab poob theem (ntau lub sij hawm / kub ua rau lub ntsiab saw degradation, cohesion txo, nplaum softens thiab ua tacky). Cov hauv paus hauv paus ua rau tsis sib haum xeeb (sab hauv tearing tawm residue) thiab nyem-tawm (txias ntws los ntawm cov npoo vim txo qis modulus) raug tshuaj xyuas.

Kab lus no qhia txog cov ntawv thov ntawm Teflon high-temperature npuag hauv kev lag luam hnub ci zog. Core daim ntawv thov nyob rau hauv module lamination: tso ntaub tso rau saum toj / hauv qab PV modules tiv thaiv molten EVA (140-150 ° C) los ntawm adhering rau cua sov platen los yog roj hmab phaj, tiv thaiv cov khoom thiab xyuas kom meej cov qauv du; laminator conveyor siv rau tsis siv neeg loading / unloading; roj hmab platen tiv thaiv ntaub txuas ntxiv kev pab cuam lub neej. Cell stringer soldering: conveyor siv nqa cov hlwb thiab ribbon los ntawm thaj chaw cua sov, nrog rau qhov tsis yog-stick nto tiv taus flux thiab solder splashes; cua sov platform cushions rau soldering workstations. Cov rwb thaiv tsev kub kub: qhwv rau cov cua sov, cov thermocouples, cables hauv laminators thiab kho qhov cub; khoom siv thermal rwb thaiv tsev curtains thiab shields.

Kab lus no suav nrog cov kauj ruam ua ntej yuav tsum tau ua rau fiberglass ntaub ua ntej PTFE emulsion impregnation. Kauj Ruam 1: Kev kho cua sov / dewaxing ntawm 300-450 ° C kom tshem tawm tag nrho cov paraffin wax thiab roj los ntawm fiber ntau (paraffin wax, starch derivatives), residual sizing cov ntsiab lus yuav tsum tau qis dua 0.2%, ua 'heat-dewaxed npuag.' Kauj Ruam 2: Kev kho tshuaj deg KH5-0 silica gel, 0. A-174) los tsim cov tshuaj lom neeg cov yeeb yaj kiab rau ntawm qhov chaw fiber ntau, ua kom tus choj molecular ntawm inorganic iav fibers thiab organic PTFE; cov khoom lag luam muaj nyob rau hauv cov ntaub ntawv kho mob ua ntej tuaj yeem hla cov kauj ruam no tab sis yuav tsum tau kuaj xyuas. Kauj Ruam 3: Qhuav thiab preheating - kom qhuav ntawm 80-120 ° C rau 1-2 teev kom txo cov dej noo hauv qab 0.1%, tiv thaiv npuas / void tsim thaum kho.

Kab lus no nthuav tawm txoj hauv kev los txhim kho creep tsis kam thiab lub sij hawm ntev tuav ruaj khov ntawm Teflon high-temperature daim kab xev. Cov tswv yim muaj xws li: Molecular network topology optimization - siab MQ silicone resin / cov pos hniav piv (1.2: 1-2: 1) cov ntaub ntawv nyuaj-theem domains; kev koom ua ke ntawm phenyl pawg (20-30 mol%) cuam tshuam cov saw hlau; crosslink molecular hnyav tswj ntawm 5,000-15,000 g / mol; Gradient modulus multilayer nplaum qauv - primer-anchoring txheej (1-3μm) nrog silane coupling tus neeg sawv cev, high-modulus cohesive txheej (30-50μm) raws li shear-resistant skeleton, viscoelastic functional txheej (3-8μm) rau deg ntub dej; Nanofillers - fumed silica (10-25 wt%) nrog kev hloov kho saum npoo tsim rov qab lub cev sib txuas.

Kab lus no piav qhia yuav ua li cas PTFE txheej daim ntawv cog lus rau fiberglass ntaub substrate nyob rau hauv Teflon high-temperature ntaub. Kev sib txuas ncaj qha tshuaj tsis tuaj yeem ua tsis tau vim PTFE's ultra-low nto zog. Bonding yog tiav los ntawm: Mechanical interlocking (lub cev sib txuas) - PTFE emulsion nkag mus rau fiber ntau thiab grips fiber bundles tom qab sintering; Silane coupling tus neeg saib xyuas ua ntej - tsim cov choj molecular ntawm inorganic iav fibers thiab organic primer; Tshuaj primer hloov txheej txheej - siv PAI, PPS, PES los yog PEEK resins nrog PTFE micropowder, thov tom qab coupling kev kho mob los tsim robust kev hloov txheej; Kub-melt nplaum zaj duab xis lamination - FEP los yog PFA films (melting point 260-310 ° C) daim ntawv cog lus ua ntej tsim PTFE zaj duab xis rau ntaub; Gradient qauv ntawm ntau yam impregnation thiab sintering cycles - dilute thawj dhau nrog binder / coupling tus neeg saib xyuas nkag mus tob rau hauv fibers, ua raws li cov ntshiab PTFE impregnations, tsim compositional gradient los ntawm fiberglass mus rau ntshiab PTFE.