Hoʻopili kēia ʻatikala i nā manawa noi no ka lole wela wela ʻo Teflon i loko o ka ʻoihana pākaukau paʻa e kū nei. ʻEhā mau wahi: ʻO ka hana ʻana o ka membrane electrode/electrolyte maloʻo - nā kāʻei conveyor anti-stick kiʻekiʻe no ke kaomi ʻōwili wela (150-250°C) e hiki ai i ka peeling maʻemaʻe o nā kiʻiʻoniʻoni kākoʻo ponoʻī; ʻO ka uhi uhi ʻili wela ma ke ʻano he semi-permanent anti-stick layer; e hōʻoia i ka maʻemaʻe kiʻiʻoniʻoni, hoʻemi i nā hemahema, hoʻomaikaʻi i ka hua. E hoʻokuʻu i nā laina laina a me nā pad cushioning no ka hoʻopaʻa ʻana i ka wela - ʻo ka sulfide/polymer batteries e koi i ka isostatic / flat pressing (100-300 ° C, ʻumi MPa); ʻO ka lole PTFE i hoʻonoho ʻia ma waena o ka puʻupuʻu pākaukau a me ka mold e pale i ka hoʻopili ʻana, hiki i ka hoʻohele like ʻana o ka puʻupuʻu ma o ka micro-elasticity, pale i nā pā wela.

Ke nānā nei kēia ʻatikala i nā hoʻololi i nā kaulahao molekala PTFE ma lalo o ka irradiation ultraviolet. ʻO ka ʻoki kaulahao nui a me ka hoʻohaʻahaʻa paona molekala: ʻO UV (254nm, 471 kJ/mol) e uhaki i nā mea paʻa CC (347 kJ/mol), ka homolysis, ka hoʻoulu ʻana i nā radical manuahi i hoʻopau ʻia e CF₂, ka hāʻule ʻana o ke kaumaha molekala, nalowale o ka paʻakikī a me ka elongation. ʻO nā ala hoʻololi manuahi manuahi: i loko o ka oxygen, hana ʻia nā radical peroxy, hoʻonohonoho hou i ka acyl fluoride (—COF) a me ka carboxylic acid (—COOH) hui hope, e hoʻokuʻu ana i ka COF₂ a me CO₂ (COF₂ hydrolyzes i HF); i nā lewa inert, ʻoi aku ka disproportionation/recombination, akā mau ka ʻoki kaulahao.

Hoʻopili kēia ʻatikala i ka hoʻohana ʻana i ka lole Teflon kiʻekiʻe i loko o nā papa hana hoʻokalakupua wela. ʻO ke kumu waiwai: ka lole fiberglass i uhi ʻia e PTFE, i ʻike ʻia ma ka aerospace e like me ka lole Beta, e hui pū ana i ka maʻalahi o ka lole me ka PTFE extreme-environment inertness. Ke kuleana: ka papa o waho loa o Thermal Micrometeoroid Garment (TMG) i nā ʻāpana mobility extravehicular, e kū pono ana i ka vacuum, nā ʻokoʻa wela kiʻekiʻe, a me nā micrometeoroids ma ke ʻano he pale kino/thermal mua no nā kiʻiʻoniʻoni aluminized i loko. ʻO ka palekana kaiapuni koʻikoʻi: kū i ka -200 ° C a + 260 ° C ka laulā (ke alo o ka lā> 120 ° C i ke aka -160 ° C); ʻO ka ʻili keʻokeʻo e hōʻike ana i ka radiation lā; pale i nā kiʻiʻoniʻoni polyimide aluminized palupalu mai nā ʻōpala a me nā waimaka. Kōkua ka neʻe ʻana: ʻo ka ʻili PTFE haʻahaʻa haʻahaʻa e pale i ka ʻili ʻana o ka papa i ka wā e kulou ana, e hōʻoia ana i ka hiki ke hoʻololi ʻia ʻo EVA.

Hoʻopili kēia ʻatikala i nā pono noi o Teflon lole wela kiʻekiʻe i ka hoʻomaloʻo ʻana i ka pā uila lithium. Hoʻohana ʻia e like me nā kāʻei conveyor a i ʻole nā ​​​​laina umu, e hoʻonā i nā pilikia koʻikoʻi ʻekolu: slurry adhesion, corrosion, a me electrode scratching. ʻEhā mau wahi maikaʻi: ʻO ka maikaʻi o ka electrode a me ka hua - nā mea anti-stick e pale ai i ka PVDF binder adhesion e hiki ai i ka peeling piha maʻalahi; ʻAʻole ka haʻihaʻi ʻana o ka thermal conductivity ma 100-140 ° C; hoʻopau ka ʻili pahee i nā ʻōpala a me ka hoʻokahe ʻana o ka pauka; ʻO ke kūpaʻa a me ka paʻa o ka hana - ke kūʻē ʻana i nā mea hoʻoheheʻe NMP a me nā mahu electrolyte me ka ʻole o ka pehu ʻana a me ka ʻelemakule; ka ikaika tensile kiʻekiʻe a me ke kūpaʻa dimensional mai ka fiberglass substrate no ke kūlana pololei; hoʻomaʻemaʻe maʻalahi me ke koena liʻiliʻi e hoʻohālikelike ʻia me nā kāʻei mesh mesh.

Hoʻopili kēia ʻatikala i ka laina wikiwiki laina maʻamau no ka PTFE kiʻekiʻe-mehana lole impregnation laina hana. ʻO ka wikiwiki maʻamau: 2-15 m / min, ka pae hana paʻa 3-8 m / min, nā lole lahilahi / nā laina kiʻekiʻe a hiki i ka 10-15 m / min. 'O nā pilikia mai ka komo 'ana i ka impregnation: pono e ho'opiha piha 'ia ka lole me ka emulsion PTFE i loko o ka pū'olo fiber i loko - 'o ke ki'eki'e ki'eki'e ke kumu i lawa 'ole ai ka impregnation, ka pololi resin a me ka pulu maloo; ʻO ka viscosity emulsion, ka hoʻopaʻa paʻa, ka nui o ka ulana lole e hoʻemi ana i ka helu komo ʻana, e koi ana i nā māmā māmā no nā lole mānoanoa. Kaʻaʻaʻahu: pono nā pā he nui (2-6+) no ka uhi ʻole ʻana o ke kīnā ʻole; ʻoi aku ka mālie o ka hele mua ʻana no ka heleuma ʻana, hiki ke hoʻonui ʻia nā hala ma hope.

Hoʻopili kēia ʻatikala i ka ʻike silica a me nā hiʻohiʻona noiʻi o ka lole aniani kiʻekiʻe silica fiber. ʻO ka kikoʻī kikoʻī silica: ʻo ka mea hōʻailona koʻikoʻi ʻo SiO₂ ≥96% (maʻamau 96-98%, nā helu premium> 99% ma o ka leaching acid a me ka sintering, e hoʻokokoke ana i ka fiber quartz maʻemaʻe). Hana ʻia: E hoʻoheheʻe ʻia ka waikika wela e hoʻoheheʻe i nā ʻāpana non-silica (boron oxide, sodium oxide), hana i ka iwi porous kiʻekiʻe-silica, a laila hoʻopaʻa ʻia no ka densification. ʻO nā pōmaikaʻi kumu: ka lawelawe mau ʻana ma 900 ° C i ka oxidizing atmospheres, pōkole ma luna o 1200 ° C, kahi palupalu kokoke i 1700 ° C; paʻa kemika i ka hapa nui o nā ʻakika/alkali koe wale ka HF a me ka waika phosphoric wela; haʻahaʻa dielectric mau a paʻa insulation ma kiʻekiʻe wela.

Hoʻopili kēia ʻatikala i ka hanana delamination o ka lole wela wela ʻo Teflon. ʻO ka Delamination e pili ana i ka hoʻokaʻawale ʻana a me ka ʻili ʻana ma waena o ka uhi ʻana o ka PTFE a me ka lole kumu fiberglass kūloko a i ʻole ma waena o nā papa uhi he nui. Nā hōʻike ʻike maka: ʻōhū/puʻi (nā ʻōpū i hoʻāla ʻia me ka manaʻo hollow) ma ke ʻano he hōʻailona mua; ka ʻili ʻana o ka interlayer me ka uhi maʻalahi e wehe ʻia i nā lau e hōʻike ana i ka fiberglass keʻokeʻo; ʻo ka hoʻomaʻemaʻe kūloko i ukali ʻia e ka flaking ma hope o ka wela/friction. Nā kumu nui: ʻO ka pōʻino koʻikoʻi wela - ʻokoʻa nā koena hoʻonui wela ma waena o PTFE a me fiberglass e hana i ke koʻikoʻi o loko, nā pōʻai hoʻomehana/hoʻoluʻu wikiwiki e hoʻokaʻawale; ʻO nā hemahema o ka maikaʻi o ka hana ʻana - lawa ʻole ka mālama ʻana i ka fiberglass surface, ʻilihune PTFE impregnation, lawa ʻole ka sintering e hoʻonāwaliwali ai i ka pilina interfacial.

Hōʻike kēia ʻatikala i nā hiʻohiʻona microstructural o Teflon lole wela kiʻekiʻe. Ka iwi lepo: ka ulana aniani puluniu ulana lole ma ka laula/twill me ka porosity kiʻekiʻe (micron-scale pores i loko o ka pulupulu pulupulu a me ka warp-weft nodes) e hoolako ana i wahi no ka PTFE impregnation. ʻO ka morphology uhi: piha impregnation encapsulation e hoʻokumu ana i ka ʻano 'reinforced concrete' kahi e hoʻoikaika ai nā fiber aniani i ka pae, PTFE mau matrix; ili nodular microstructure o nā nodules (particles) i hui pū ʻia e nā fibrils maikaʻi i hana ʻia i ka wā sintering; ʻO ka ʻili ʻili paʻa mau (he mau ʻumi o nā microns mānoanoa) o ka PTFE maʻemaʻe ma ke ʻano he pale kī no ka inertness kemika, nā waiwai non-stick, a me ka insulation uila.

Ke nānā nei kēia ʻatikala i nā hoʻololi ʻana o ka PTFE i ka lole wela kiʻekiʻe i ka wā ʻelemakule. ʻEhā mau hiʻohiʻona: PTFE coating microstructure - molecular chain scission and oxidation (carbonyl/carboxyl group formation), hoʻololi crystallinity (ala mua a hāʻule), micro-crack and pinhole formation, surface powder; ʻO ke aniani fiber substrate a me ka interface — ka hoʻoheheʻe ʻia ʻana o ka mea hoʻohui a me ka hoʻopili ʻana i ka nalo ʻana o ka hoʻopaʻa ʻana, ka debonding interfacial a me ka hoʻopau ʻana (ka ʻeleʻele, nā wahi keʻokeʻo), ka ʻānai ʻana o ka pūnaewele fiber glass a me ka embrittlement, ka ua metala metala oxide e hoʻopilikia ai i ke kaumaha; ʻO ke ʻano macroscopic a me ka hiʻohiʻona - hoʻololi kala (keʻokeʻo→beige→brown→ʻeleʻele), ka hoʻohaʻahaʻa ʻana a me ka curling, ka ʻeleʻele o ka ʻili a me ka nalo ʻana, ka pauka ma ka hoʻopā ʻana, pau loa ka loli. ʻO ke ʻano o ka ʻelemakule: ke kaʻina holomua o ka ' hoʻohaʻahaʻa i ka uhi ʻana → hāʻule ʻole o ka interface → hoʻohaʻahaʻa i ka substrate.'

Hoʻopili kēia ʻatikala pehea e hoʻomalu ai i ka manawa sintering o ka lole wela kiʻekiʻe PTFE. Ke ʻano hoʻomalu kumu: hoʻoponopono wikiwiki laina. Ka manawa hoʻoheheʻe = ka lōʻihi o ka pauku hoʻomehana maikaʻi ÷ ka māmā holo lole. ʻO 350°C ka paepae sintering kūpono (ma luna o kēia mahana ke helu ʻia he manawa sintering). ʻO ka hoʻolaha ʻana o ka mahana he nui: preheating (100-250 ° C), sintering (360-395 ° C), hoʻonohonoho wela kiʻekiʻe (380-390 ° C), hoʻoluʻu (ma lalo o 300 ° C). Nā manawa kuhikuhi ma 380-390 ° C: māmā (0.08-0.13mm) 30-60 kekona; maʻamau (0.18-0.25mm) 1.5-3 mau minuke; kaumaha (≥0.35mm) 3-5 mau minuke. Ka ʻike a me ka hoʻoponopono: under-sintering (ikaika haʻahaʻa, hoʻoheheʻe ʻia ka pauka, micro-cracks) → hoʻemi i ka wikiwiki e hoʻolōʻihi i ka manawa; ʻoi aku ka hoʻopaʻa ʻana (yellowing, brittleness, fumes keʻokeʻo) → hoʻonui i ka wikiwiki e pōkole ka noho ʻana. ʻO ka hoʻohālikelike ʻana i ka mahana-manawa hiki ke hoʻopaʻa haʻahaʻa haʻahaʻa (360-375°C, 5-8 mau minuke).