Nakuba i-PTFE (polytetrafluoroethylene) kanyei-ePTFE(i-polytetrafluoroethylene enwetshiwe) inesisekelo esifanayo samakhemikhali, inomehluko omkhulu ekwakhiweni, ekusebenzeni kanye nasezindaweni zokusetshenziswa.
Isakhiwo samakhemikhali kanye nezakhiwo eziyisisekelo
Zombili i-PTFE ne-ePTFE zenziwe nge-polymer kusuka kuma-monomers e-tetrafluoroethylene, futhi zombili zinefomula yamakhemikhali (CF₂-CF₂)ₙ, angasebenzi kahle ngamakhemikhali futhi amelana nokushisa okuphezulu. I-PTFE yakhiwa ngokushiswa kokushisa okuphezulu, futhi amaketanga ama-molecule ahlelwe eduze ukuze akhe isakhiwo esiminyene, esingenazo izimbobo. I-ePTFE isebenzisa inqubo ekhethekile yokwelula ukwenza i-PTFE ibe yi-fiberize emazingeni okushisa aphezulu ukuze yakhe isakhiwo se-mesh esinezimbobo esingu-70%-90%.
Ukuqhathaniswa kwezakhiwo ezibonakalayo
| Izici | I-PTFE | i-ePTFE |
| Ubuningi | Okuphezulu (2.1-2.3 g/cm³) | Okuphansi (0.1-1.5 g/cm³) |
| Ukuvunyelwa komoya | Akukho ukungena kwamanzi (kuminyene ngokuphelele) | Ukuvuleka okuphezulu (ama-micropores avumela ukusabalala kwegesi) |
| Ukuzivumelanisa nezimo | Kuqinile futhi kuyaphuka kalula | Ukuguquguquka okuphezulu kanye nokunwebeka |
| Amandla omshini | Amandla aphezulu okucindezela, ukumelana okuphansi kokunyenya | Ukumelana nezinyembezi okuthuthukisiwe kakhulu |
| Ukubhoboka kwe-Porosity | Azikho izimbobo | Ukugoba kungafinyelela ku-70% -90% |
Izici zokusebenza
●I-PTFE: Ayisebenzi ngamakhemikhali futhi imelana nama-asidi aqinile, ama-alkali aqinile kanye nezinyibilikisi eziphilayo, inobubanzi bokushisa obuqala ku--200°C kuya ku-+260°C, futhi ine-dielectric constant ephansi kakhulu (cishe i-2.0), okwenza ifaneleke ekufakweni kwe-high-frequency circuit insulation.
● i-ePTFE: Isakhiwo esinezimbobo ezincane singafinyelela izakhiwo ezingangeni manzi neziphefumulayo (njengesimiso se-Gore-Tex), futhi sisetshenziswa kabanzi ezifakelweni zezokwelapha (njengezimbobo zemithambo yegazi). Isakhiwo esinezimbobo sifanelekile ukuvala ama-gasket (ukugoba kabusha ngemva kokucindezelwa ukuze kugcwaliswe igebe).
Izimo ezijwayelekile zohlelo lokusebenza
● I-PTFE: Ifanelekela ukufakelwa kwekhebula lokushisa eliphezulu, izembozo zokugcoba ezithwalayo, izintambo zamapayipi amakhemikhali, kanye nezintambo ze-reactor ezihlanzekile kakhulu embonini ye-semiconductor.
● i-ePTFE: Ensimini yekhebula, isetshenziswa njengengqimba yokuvikela izintambo zokuxhumana ezivame kakhulu, emkhakheni wezokwelapha, isetshenziselwa imithambo yegazi yokwenziwa kanye nama-suture, kanti emkhakheni wezimboni, isetshenziselwa ulwelwesi lokushintshana kwe-proton cell fuel cell kanye nezinto zokuhlunga umoya.
I-PTFE kanye ne-ePTFE ngayinye inezinzuzo zayo. I-PTFE ifanelekela izindawo zokushisa okuphezulu, umfutho ophezulu, kanye nezindawo ezigqwala ngamakhemikhali ngenxa yokumelana kwayo nokushisa okuphezulu, ukumelana namakhemikhali, kanye ne-coefficient ephansi yokungqubuzana; i-ePTFE, ngokuguquguquka kwayo, ukungena komoya, kanye nokuhambisana kwezinto eziphilayo okulethwa yisakhiwo sayo esinezimbobo ezincane, isebenza kahle embonini yezokwelapha, yokuhlunga, kanye neyokuvala enamandla. Ukukhetha izinto kufanele kunqunywe ngokusekelwe ezidingweni zesimo esithile sokusetshenziswa.
Yiziphi izinhlelo zokusebenza ze-ePTFE emkhakheni wezokwelapha?
i-ePTFE (i-polytetrafluoroethylene enwetshiwe)isetshenziswa kabanzi emkhakheni wezokwelapha, ikakhulukazi ngenxa yesakhiwo sayo esiyingqayizivele se-microbe ne-porous, ukuhambisana kwezinto eziphilayo, izakhiwo zayo ezingezona ezinobuthi, ezingazweli futhi ezingezona ezibangela umdlavuza. Nazi izindlela zayo eziyinhloko zokusebenzisa:
1. Insimu yenhliziyo nemithambo yegazi
Imithambo yegazi yokwenziwa: i-ePTFE iyinto yokwenziwa esetshenziswa kakhulu emithanjeni yegazi yokwenziwa, engaba ngu-60%. Isakhiwo sayo esinezimbobo ezincane sivumela amangqamuzana ezicubu zomuntu kanye nemithambo yegazi ukuba ikhule kuyo, yakha ukuxhumana eduze kwezicubu ze-autologous, ngaleyo ndlela ithuthukise izinga lokuphulukiswa kanye nokuqina kwemithambo yegazi yokwenziwa.
I-patch yenhliziyo: esetshenziselwa ukulungisa izicubu zenhliziyo, njenge-pericardium. I-patch yenhliziyo ye-ePTFE ingavimbela ukunamathelana phakathi kwenhliziyo nezicubu ze-sternum, inciphise ingozi yokuhlinzwa kwesibili.
I-Vascular stent: i-ePTFE ingasetshenziswa ukwenza uqweqwe lwe-vascular stents, futhi ukuhambisana kwayo okuhle kanye nezakhiwo zayo zemishini kusiza ekunciphiseni ukuvuvukala kanye ne-thrombosis.
2. Ukuhlinzwa kwepulasitiki
Izinto zokufakelwa kobuso: i-ePTFE ingasetshenziswa ukwenza izinto zepulasitiki zobuso, njenge-rhinoplasty kanye ne-facial fillers. Isakhiwo sayo esinezimbobo ezincane sisiza ukukhula kwezicubu futhi sinciphise ukwenqatshwa.
Ukufakelwa Kwamathambo: Emkhakheni wezokwelapha ngamathambo, i-ePTFE ingasetshenziswa ukukhiqiza ukufakelwa kwamalunga, futhi ukumelana kwayo nokuguguleka okuhle kanye nokuhambisana kwayo nezinto eziphilayo kusiza ukwandisa impilo yenkonzo yokufakelwa.
3. Ezinye izinhlelo zokusebenza
Ama-patches e-Hernia: Ama-patches e-Hernia enziwe nge-ePTFE angavimbela ngempumelelo ukuphinda kwe-hernia, futhi isakhiwo sawo esinezimbobo sisiza ukuhlanganiswa kwezicubu.
I-Medical sutures: I-ePTFE sutures inokuguquguquka okuhle kanye namandla okunamathela, okunganciphisa ukunamathela kwezicubu ngemva kokuhlinzwa.
Ama-valve enhliziyo: i-ePTFE ingasetshenziswa ukukhiqiza ama-valve enhliziyo, futhi ukuqina kwayo kanye nokuhambisana kwayo nezinto eziphilayo kusiza ukwandisa impilo yenkonzo yama-valve.
4. Izimbozo zedivayisi yezokwelapha
I-ePTFE ingasetshenziswa futhi ekumbozeni amadivayisi ezokwelapha, njenge-catheter kanye nezinsimbi zokuhlinza. I-coefficient yayo ephansi yokungqubuzana kanye nokuhambisana kwezinto eziphilayo kusiza ekunciphiseni ukulimala kwezicubu ngesikhathi sokuhlinzwa.
Isikhathi sokuthunyelwe: Ephreli-27-2025