Lesi sihloko sihlanganisa ukusetshenziswa kwendwangu ye-PTFE enezinga eliphezulu lokushisa emikhiqizweni eyinhlanganisela ye-carbon fibre flat. Ukubunjwa kokucindezela: kubekwe phakathi kwesikhunta kanye nama-prepregs ukuvimbela ukunamathela kwe-epoxy resin, okuvumela ukudonsa kalula; kufakwe phakathi kwamaphaneli amancane amancane ukuze kugwenywe ukunamathelana. Ukubumba isikhwama se-vacuum: ifilimu ekhishwa kabusha esetshenziswayo phakathi kwendwangu ye-prepreg ne-breather, evumela indawo yegesi/inhlaka kuyilapho kuvumela ukuxebuka kalula ngemva kokwelashwa; uhlangothi oluthungwe ludlulisa ukuthungwa okuhle kwendawo ukuze kuthuthukiswe ubuhwaba obuhlanganisayo, kuqede ukuthungatha isihlabathi. Ukukhiqizwa okuqhubekayo: amabhande okuthutha angenamthungo angagxili athwala ama-prepregs ngokusebenzisa izindawo zokufudumeza/ukucindezela; isendlalelo se-cushion sisabalalisa ingcindezi ngokulinganayo inciphisa ukuhlehlisa okwenziwe kwasendaweni.

Lesi sihloko sihlola ukuthi kungenzeka yini ukwelashwa kwelangabi lokuguqulwa kwendawo ye-PTFE futhi iqhathanise imiphumela ne-corona kanye nokwelashwa kwe-plasma. Ukuba nokwenzeka: ilangabi lingashintsha i-PTFE kodwa akuvamile ukuthi lisetshenziswe ezimbonini — izingozi zokuphepha (i-PTFE ibola ikhipha i-HF enobuthi ne-perfluoroisobutylene); ukusebenza kunomkhawulo (amandla angaphezulu angama-30-35 mN/m kuphela, enza isendlalelo somngcele esibuthakathaka). Izindlela zokusebenza: ilangabi — i-oxidation yesikhashana ephezulu yezinga lokushisa (>1000°C), i-etching kancane, amaqembu ambalwa omoya-mpilo; i-corona - ukukhishwa kwe-voltage ephezulu kukhiqiza i-ozone/i-oxygen esebenzayo, i-oxidation emnene, ukuminyana kwamandla aphansi akukwazi ukuphula izibopho ze-CF; i-plasma — izinhlayiya ezinamandla/ama-electron/ama-radicals wamahhala ahlukanisa ngokuqondile izibopho ze-CF namaqembu e-polar axhunyelelwe (i-hydroxyl, i-carboxyl, i-amino).

Lesi sihloko sihlanganisa indlela yokufanisa isivinini somugqa womshini wokumboza kanye nobude be-ovini ukuze kuqinisekiswe ukunamathela kwe-organosilicone kufinyelela izinga lokuphulukisa eliqondiwe letheyiphu ye-PTFE yokushisa ephezulu. Isimiso sokufanisa esiyinhloko: isikhathi sokuhlala sisonke t_total = ubude behhavini obusebenzayo L ÷ isivinini somugqa v akumelwe sibe ngaphansi kwesilinganiso esincane esidingekayo sokwelapha. Thola izici zokwelapha nge-DSC noma ukuhlola okunamathelayo okusungula ubuhlobo 'izinga lokushisa - ubuncane besikhathi sokwelapha'. Imodeli yokwelapha eqongelelekayo elinganayo: hlukanisa i-ovini ibe izindawo, bala i-ti=Li/v kanye ne-tcure(Ti), qinisekisa ∑(ti/tcure(Ti)) ≥1. Izinqubo zokubala: setha izindawo zokushisa ezinobude uLi namazinga okushisa Ti; setha isivinini somugqa v, ubale isikhathi sokuhlala sendawo ngayinye nesilinganiso somnikelo; phinda kuze kube isamba esingu-≥1 (imajini yokuphepha engu-1.1-1.2 iyanconywa).

Lesi sihloko sihlanganisa imisebenzi ye-PTFE ekuhlanganisweni kwe-thermal insulation yezinjini ezicitshwayo. Izindlela ezine: Ukubola kwe-Endothermic — PTFE depolymerizes at ~400°C to tetrafluoroethylene (highly endothermic, ~3,000°C ukuchayeka kwegesi evuthayo), imunca ukushisa okukhulu futhi ikhiphe amandla ashisayo endaweni yodonga. Ukupholisa i-transpiration kanye ne-gas film insulation - amagesi okubola (tetrafluoroethylene) angena ngaphandle ngama-micro-pores, asuse ukushisa komhlaba; ifilimu yegesi egelezayo ihlukanisa igesi evuthayo eshisa kakhulu odongeni, inciphisa ukushisa okuseduze nodonga nge>50%; ifilimu yegesi iguqula isivinini/izinga lokushisa lomngcele, inciphise ukuguguleka kwezinhlayiyana.

Lesi sihloko sihlanganisa imiphumela ye-gamma-ray irradiation kusakhiwo nezakhiwo ze-PTFE. Izinguquko zesakhiwo samakhemikhali: imisebe ye-gamma iphula amaketango ayinhloko e-CC kanye namaketango aseceleni e-CF (inani le-G 3.0-3.5), okubangela ukugoqa okukhulu kweketango kanye nokwehla okukhulu kwesisindo samangqamuzana; ku-oxygen, ama-radicals amahhala enza i-peroxy radicals ethula i-acyl fluoride kanye namaqembu okuphela kwe-carboxylic acid (i-hydrolyzing kuya ku-HF). Isakhiwo esijiyile siyashintsha: i-crystallinity ikhuphuka ekuqaleni (umthamo ophansi, amaketanga amafushane ahlela kabusha) bese ewa (umthamo ophezulu, amaphutha aphazamisa amakristalu); i-lamellar crystals fragment ibe amakristalu amancane ane-oda lebanga elide elanyamalala. Ukuwohloka kwempahla: ubude ngesikhathi sekhefu buyehla ukusuka ku-0.1 kGy emoyeni, ukulahlekelwa > 90% ku-~1kGy — impahla iba lukhuni futhi ibe brittle; indawo yokuncibilika yehla isuka ku-327°C iye ngaphansi kuka-310°C; amaqembu e-polar aphakamisa kancane ukwehla kwe-dielectric / ukulahlekelwa; izinguquko ezingaphezulu ukusuka kokumhlophe kuye kokumpunga/okumnyama nokulahlekelwa isicwebezelisi.

Lesi sihloko sihlanganisa izindlela zokulawula ukucwebezela kwe-PTFE enamathela kwindwangu ye-Teflon enezinga eliphezulu lokushisa. Ukulawulwa kwezinga lokupholisa kuqondile kakhulu futhi kusebenza ngempumelelo: Ukupholisa okusheshayo (ukucisha) ngamakhethini omoya obandayo, amarola okupholisa noma amathange amanzi - amaketanga amangqamuzana ayabanda ngaphambi kokuhleleka oku-oda, akhe amakristalu amancane angaphelele; ukunamathela kuthambile, kuqinile ngokusebenza okuthuthukisiwe okungenanduku, ubulukhuni obuncishisiwe/ukumelana nokugqoka. Ukupholisa kancane (i-annealing) ngesigaba sokugcina ukushisa ku-10-50°C/h noma ukupholisa esithandweni - amaketanga e-molecular ahleleka ngokugcwele abe ama-spherulite amakhulu aphelele; ukugqoka kunokuqina okuphezulu, ukumelana nokugqokwa okuvelele, ubukhulu obuzinzile, ukuguquguquka okuncishisiwe kanye nokwenyuka kwe-brittleness.

Lesi sihloko sihlanganisa ukusetshenziswa kwendwangu ye-Teflon enezinga lokushisa eliphezulu ezithandweni zokushisa komoya oshisayo. Ukuba nokwenzeka: kungasetshenziswa njengomcamelo ongagxili kumabhande anezikhala noma amathreyi lapho izinga lokushisa lomlilo lingu-≤260°C (ukoma okunezinga lokushisa eliphansi, ukususwa kwe-binder, ukuphulukiswa kwe-slurry) — kuthuthukisa ukubhidliza nokucosha ukusebenza kahle. Akuvunyelwe ngokuqinile emazingeni okushisa aphakathi nendawo/aphezulu (300-950°C) — I-PTFE ibola ikhiphe i-HF enobuthi ne-perfluoroisobutylene, okokusebenza okugqwalile futhi kubangele ushevu obulalayo. Umgomo wokuphepha: uma izinga lokushisa lomlilo lingacacile noma lingenakuqinisekiswa ngaphansi kuka-260°C, ungasebenzisi. Izakhiwo eziyinhloko: isevisi eqhubekayo -70 ° C kuya ku-260 ° C, yesikhathi esifushane 300 ° C; ukungabi nenduku okwedlulele kanye nokungabi namakhemikhali; ukufakwa kahle kagesi; ukungqubuzana okuphansi (~0.04); Isisekelo se-fiberglass sinikeza amandla aphezulu okudonsa.

Lesi sihloko siqhathanisa umehluko phakathi kokushisisa ngemisebe ye-infrared kanye nezindlela zokuphulukisa zokufudumeza komoya oshisayo ekufanisweni kwesakhiwo esiphambanayo sezendlalelo zokunamathela ze-silicone. Izindlela zokudlulisa ukushisa: umoya oshisayo uncike ekuqhubeni i-convection ngokukhuphuka kwezinga lokushisa elithambile, umehluko omncane wokushisa wangaphakathi / wangaphandle; I-IR inokujula kokungena okulinganiselwe nokumuncwa okuqinile kwendawo (amashumi kuya kumakhulu ama-micrometer) okudala ukuthambekela okuphakathi nendawo kuya kwangaphakathi. Imithelela ekufaniseni kwe-crosslink: umoya oshisayo uvumela ukuphulukiswa okuvumelanayo ngaphakathi nangaphandle ngobuningi be-crosslink obufanayo; I-IR ibangela ungqimba olungaphezulu ukuthi lwakhe 'ifilimu yesikhumba' eliminyene ngokushesha evimbela ukuqhutshwa kokushisa kanye nokunyakaza kwangaphakathi kweketango, okudala ukuminyana kwe-crosslink kwehla ukusuka phezulu kuye ngaphakathi.

Lesi sihloko sifaka ububanzi besivinini somugqa ojwayelekile womugqa wokukhiqiza wendwangu we-Teflon wezinga lokushisa eliphezulu. Amabanga wejubane: imikhiqizo emincane evamile (0.08-0.30mm) ku-0.5-3 m / min, ezinzile ku-1-3 m / min; imikhiqizo ewugqinsi/ehlanganiswe kaningi (≥0.4mm) ku-0.3-1 m/min; imigqa esebenza kahle kakhulu enamahhavini amade ingafinyelela ku-3-6 m/min kodwa imishini enzima. Izithiyo zenqubo: ukomisa nokucwilisa kudinga isikhathi sokuhlala (i-PTFE idinga amaminithi angu-1-3 ku-380-400 ° C; okunganele kubangela ukunamathela / ukuqhekeka okubi); isivinini sinqunywa ubuncane besikhathi sokumisa/sokushisa ngaphansi kobude behhavini obumisiwe. Izithiyo zezinto ezibonakalayo: ama-solids aphezulu / ama-viscosity dispersions angena kancane; izindwangu eziwugqinsi/eziminyene zimunca uketshezi futhi zidlulise ukushisa kancane; izindwangu ezibanzi ezijwayele ukuhluka kombala omaphakathi nendawo ezidinga ukuncishiswa kwesivinini. Izisetshenziswa kanye nekhwalithi yohwebo: amahhavini amade anezizoni eziningi avumela isivinini esikhulu.

Lesi sihloko sihlanganisa umehluko phakathi kwe-PTFE emulsion ekhiqizwa i-polymerization yokumiswa vs ukuhlakazwa kwe-polymerization. Ukucaciswa: i-polymerization yokumiswa ayikwazi ukukhiqiza ngokuqondile i-emulsion ye-PTFE; I-emulsion ye-PTFE yangempela ivela kuphela ekuhlakazweni kwe-polymerization. 'I-emulsion yendlela yokumiswa' empeleni iwukulengiswa okunamanzi kwe-ground suspension-polymerized resin micropowder. I-Dispersion polymerization (i-emulsion eyinhloko): izinhlayiya eziyindilinga (0.1-0.3μm, ukusatshalaliswa okuncane), ezinziswe ama-surfactants ane-perfluorinated, isisindo samangqamuzana aphezulu kakhulu (>94% crystallinity), i-fibrillation eqinile, idinga i-380°C sintering ukuze yenze ifilimu eqinile eqhubekayo.